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Cleveland-Cliffs Inc
(NYSE:CLF) 

CLF stock logo

Cleveland-Cliffs Inc. operates as an independent iron ore mining company in the United States, Canada, and internationally. It operates in two segments, Mining and Pelletizing, and Metallics. The company operates three iron ore mines, including the Tilden mine in Michigan; and the Northshore and Uni...

Founded: 1847
Full Time Employees: 2,372
Sector: Basic Materials
Industry: Steel

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At a glance:
  • Earnings Highly Levered to Steel Pricing and Auto Demand: Cleveland-Cliffs’ results are strongly influenced by North American steel price cycles and demand from automotive OEMs, making revenue and margins sensitive to macro conditions and contract resets.
  • Vertical Integration Supports Supply Security but Raises Cost Complexity: Owning iron ore assets and downstream steelmaking can stabilize raw-material supply and improve strategic positioning, but also increases fixed-cost intensity and operational complexity during downturns.
  • Balance Sheet and Liquidity Remain Key Investor Focus Areas: Debt levels, interest expense, and available liquidity are central to the equity story, with investors tracking deleveraging progress and refinancing risk alongside cyclical earnings volatility.
  • Capital Allocation Priorities: Maintenance Capex, Deleveraging, and Optionality: Management’s capital allocation typically centers on sustaining operations and investing in efficiency, while weighing debt reduction against opportunistic growth or shareholder returns depending on the cycle.
  • Policy and Trade Dynamics Can Shift the Competitive Landscape: Tariffs, quotas, and other trade measures—as well as regulatory and decarbonization requirements—can materially affect domestic pricing power, input costs, and long-term competitiveness.
Bull Thesis:
  • Integrated Business Model & Cost Control: Cleveland-Cliffs' fully integrated operations, from iron ore mining to finished steel production, provide significant cost advantages, supply chain stability, and resilience against raw material price volatility compared to less integrated peers.
  • Strategic Focus on High-Value Steel & Automotive Sector: The company has a strong presence in the automotive industry and produces advanced, high-strength steels. This segment typically commands higher margins and benefits from ongoing trends like the shift to electric vehicles and general automotive demand.
  • Beneficiary of Domestic Manufacturing & Infrastructure Spending: As a major domestic steel producer, Cleveland-Cliffs is well-positioned to benefit from 'Buy American' policies, Section 232 tariffs, and government-led infrastructure projects, which support domestic steel demand and reduce import competition.
  • HBI Production & Decarbonization Trend: Cleveland-Cliffs is a leading producer of Hot Briquetted Iron (HBI), a key input for electric arc furnaces (EAFs) which are more environmentally friendly. This positions the company favorably as the steel industry increasingly focuses on decarbonization.
Bear Thesis:
  • Cyclicality of the Steel Industry: The steel industry is highly cyclical and sensitive to economic downturns. Slowdowns in key end markets like construction, automotive, or manufacturing can significantly impact demand, pricing, and ultimately, Cleveland-Cliffs' profitability.
  • Raw Material Price Volatility: Despite its integrated model, Cleveland-Cliffs remains exposed to fluctuations in iron ore and scrap prices. Significant drops in these commodity prices, or unfavorable spreads between raw materials and finished steel, can pressure margins.
  • Global Competition & Import Pressure: Persistent global steel overcapacity, particularly from countries like China, poses a continuous threat. While tariffs offer some protection, any reduction or removal of these measures could lead to increased import competition and downward pressure on domestic steel prices.
  • High Capital Expenditure & Decarbonization Costs: The steel industry is capital-intensive, requiring ongoing investments in maintenance, upgrades, and environmental compliance. Increasing regulatory pressure and investor demands for decarbonization could necessitate substantial future capital expenditures, potentially limiting free cash flow.
Main Competitors:
  • Nucor Corporation ($NUE) (Flat-rolled steel, structural steel, plate steel, rebar), As the largest steel producer in North America by volume, Nucor competes directly with Cleveland-Cliffs across a wide range of flat-rolled steel products. While primarily an electric arc furnace (EAF) mini-mill operator, Nucor's extensive product portfolio, geographic reach, and focus on efficiency and innovation make it a formidable competitor for automotive, construction, and manufacturing customers.
  • ArcelorMittal ($MT) (Flat-rolled steel, long products, mining), A global steel and mining giant, ArcelorMittal has significant integrated and EAF operations in North America. It competes with Cleveland-Cliffs for market share in flat-rolled steel, including specialized grades for the automotive sector, and also has its own iron ore mining operations, though its North American steel production is the primary competitive overlap.
  • U.S. Steel Corporation ($X) (Flat-rolled steel, tubular products), U.S. Steel is a long-standing integrated steel producer in North America, historically similar to Cleveland-Cliffs in its reliance on blast furnace technology and focus on flat-rolled products for automotive and industrial applications. It competes directly for many of the same customers and market segments, though its future ownership is subject to a pending acquisition by Nippon Steel.
  • Steel Dynamics, Inc. ($STLD) (Flat-rolled steel, structural steel, rail), Steel Dynamics is a highly efficient and growing electric arc furnace (EAF) mini-mill operator. It competes with Cleveland-Cliffs in the flat-rolled steel market, offering a broad range of products to the automotive, construction, and manufacturing sectors. STLD's focus on cost-effectiveness, strategic acquisitions, and diversified product offerings makes it a strong competitor.
Moat:
Cleveland-Cliffs Inc. operates in a highly competitive and cyclical steel industry, primarily in North America. Its main competitive advantages (moat) include its unique vertical integration, being the largest producer of iron ore pellets in North America, which provides significant cost control and supply chain security for its steelmaking operations. The company also benefits from a strategic focus on high-value, specialized flat-rolled steel products, particularly advanced high-strength steels (AHSS) for the automotive sector, and is investing in lower-carbon steel production pathways. Competition is intense from other large domestic integrated producers (like U.S. Steel and ArcelorMittal's North American operations) and highly efficient electric arc furnace (EAF) mini-mills (like Nucor and Steel Dynamics), which often have lower capital intensity and greater operational flexibility. Additionally, the market is influenced by steel imports and global economic conditions.
Income Statements:
Quarterly
Annual
    Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 
                                                                          
      revenues
    4,734,000,000 4,934,000,000 4,629,000,000 4,325,000,000 4,569,000,000 5,092,000,000 5,199,000,000 5,112,000,000 5,605,000,000 5,984,000,000 5,295,000,000 5,044,000,000 5,653,000,000 6,337,000,000 5,955,000,000 6,004,000,000 5,045,000,000 4,049,000,000 2,255,800,000 1,646,000,000 1,092,700,000 324,500,000                                                 
      yoy
    3.61% -3.10% -10.96% -15.40% -18.48% -14.91% -1.81% 1.35% -0.85% -5.57% -11.08% -15.99% 12.05% 56.51% 163.99% 264.76% 361.70% 1147.77%                                                     
      qoq
    -4.05% 6.59% 7.03% -5.34% -10.27% -2.06% 1.70% -8.80% -6.33% 13.01% 4.98% -10.77% -10.79% 6.41% -0.82% 19.01% 24.60% 79.49% 37.05% 50.64% 236.73%                                                  
      operating costs:
                                                                          
      cost of goods sold
    -4,780,000,000 -5,143,000,000 -5,020,000,000 -4,598,000,000 -4,673,000,000 -4,930,000,000 -4,914,000,000 -4,944,000,000 -5,125,000,000 -5,340,000,000 -5,196,000,000 -5,104,000,000 -5,305,000,000 -5,356,000,000 -4,706,000,000 -4,229,000,000 -3,848,000,000 -3,761,000,000 -2,013,100,000 -1,525,400,000 -1,207,500,000 -356,000,000 -251,750,000 -400,700,000 -480.2 -126.1                                             
      selling, general and administrative expenses
    -130,000,000 -137,000,000 -133,000,000 -139,000,000 -112,000,000 -103,000,000 -132,000,000 -157,000,000 -144,000,000 -149,000,000 -127,000,000 -112,000,000 -124,000,000 -107,000,000 -122,000,000 -112,000,000 -104,000,000 -95,000,000 -94,800,000 -59,600,000 -62,100,000 -26,100,000 -37,200,000 -25,500,000 -30.6 -28.1 -35,400,000 -30,100,000 -26,200,000 -27,700,000 -105,799,922.2 -24.6 -27.5 -25.7 -117,799,918.2 -31.1 -22.5 -28.2               -83,500,000 -63,000,000 -81,000,000 -78,300,000 -69,500,000 -50,700,000 -73,700,000 -68,100,000 -50,200,000 -46,000,000 -37,100,000 -28,400,000 -23,400,000 -31,800,000 -50,200,000 -41,800,000 -52,100,000 -44,600,000 
      acquisition-related costs
       -30,000,000 -14,000,000           -4,000,000 -1,000,000 -13,000,000 -21,600,000 -7,500,000 -18,400,000 -42,500,000                                                 
      restructuring and other charges
    -3,000,000 -86,000,000 -3,000,000 2,000,000 -2,000,000 -25,000,000 -104,000,000                                                                
      asset impairment
     -39,000,000                                                                     
      miscellaneous – net
    -25,000,000 -27,000,000 -11,000,000 -25,000,000 -27,000,000 -13,000,000 -23,000,000 -6,500,000 -11,000,000 -12,000,000 -3,000,000 -6,000,000 -37,000,000 -34,000,000 -33,000,000 -10,000,000 -25,000,000 -3,000,000 -19,500,000 -15,500,000 -13,100,000 -13,300,000 -4,750,000 -7,800,000 -5.6 -3.6 -4,050,000 -6,000,000 -4,100,000 -8,700,000                                         
      total operating costs
    -4,938,000,000 -5,432,000,000 -5,167,000,000 -4,790,000,000 -4,828,000,000 -5,086,000,000 -5,237,000,000 -5,212,000,000 -5,280,000,000 -5,501,000,000 -5,326,000,000 -5,226,000,000 -5,466,000,000 -5,497,000,000 -4,861,000,000 -4,355,000,000 -3,978,000,000 -3,872,000,000 -2,149,000,000 -1,608,000,000 -1,301,100,000 -437,900,000                                                 
      operating income
    -204,000,000 -498,000,000 -538,000,000 -465,000,000 -259,000,000 6,000,000 -38,000,000 -100,000,000 325,000,000 483,000,000 -31,000,000 -182,000,000 187,000,000 840,000,000 1,094,000,000 1,649,000,000 1,067,000,000 177,000,000 107,200,000 38,000,000 -208,400,000 -78,800,000 81,700,000 121,600,000 226.8 -0.8 163,200,000 225,500,000 254,200,000 -40,000,000 423,599,673.8 129.7 114.6 81.9 240,799,890.9 34.7 74.7 -0.3 -126,799,848.7              365,300,000 231,100,000 367,900,000 820,300,000 616,900,000 541,200,000 396,600,000 389,200,000 365,800,000 113,400,000 155,600,000 80,500,000 -17,300,000 11,400,000 147,300,000 339,400,000 409,400,000 42,600,000 
      yoy
    -21.24% -8400.00% 1315.79% 365.00% -179.69% -98.76% 22.58% -45.05% 73.80% -42.50% -102.83% -111.04% -82.47% 374.58% 920.52% 4239.47% -612.00% -324.62% 31.21% -68.75% -91887225.22% 9849999900.00% -49.94% -46.08% -100.00% -100.00% -61.47% 173862660.22% 221814908.73% -48840148.84% 75.91% 273.78% 53.41% -27400.00% -289.91%                  -40.78% -57.30% -7.24% 110.77% 68.64% 377.25% 154.88% 383.48% -2214.45% 894.74% 5.63% -76.28% -104.23% -73.24%     
      qoq
    -59.04% -7.43% 15.70% 79.54% -4416.67% -115.79% -62.00% -130.77% -32.71% -1658.06% -82.97% -197.33% -77.74% -23.22% -33.66% 54.55% 502.82% 65.11% 182.11% -118.23% 164.47% -196.45% -32.81% 53615420.28% -28450.00% -100.00% -27.63% -11.29% -735.50% -109.44% 326599494.29% 13.18% 39.93% -100.00% 693947712.39% -53.55% -25000.00% -100.00%               58.07% -37.18% -55.15% 32.97% 13.99% 36.46% 1.90% 6.40% 222.57% -27.12% 93.29% -565.32% -251.75% -92.26% -56.60% -17.10% 861.03%  
      operating margin %
    -4.31% -10.09% -11.62% -10.75% -5.67% 0.12% -0.73% -1.96% 5.80% 8.07% -0.59% -3.61% 3.31% 13.26% 18.37% 27.47% 21.15% 4.37% 4.75% 2.31% -19.07% -24.28% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% -Infinity% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 
      other income:
                                                                          
      interest expense
    -153,000,000 -149,000,000 -140,000,000 -135,000,000 -102,000,000 -69,000,000 -64,000,000 -63,000,000 -70,000,000 -79,000,000 -77,000,000 -71,000,000 -64,000,000 -64,000,000 -77,000,000 -81,000,000 -85,000,000 -92,000,000 -70,100,000 -68,200,000 -68,700,000 -31,000,000 -24,700,000 -25,300,000 -26.1 -25.1 -25,800,000 -29,500,000 -31,200,000 -33,500,000 -131,999,896.9 -28.9 -31.4 -42.8 -200,499,843.8 -48.7 -50.7 -56.8               -47,100,000 -47,300,000 -47,300,000 -49,600,000 -81,000,000 -38,200,000 -28,900,000 -17,300,000 -13,300,000 -10,200,000 -9,700,000 -10,000,000 -10,000,000 -9,300,000 -12,100,000 -10,700,000 -9,800,000 -7,200,000 
      loss on extinguishment of debt
         -6,000,000 -21,000,000       -66,000,000 -14,000,000                                                        
      net periodic benefit credits other than service cost component
    57,000,000 43,000,000 57,000,000 63,000,000 62,000,000 62,000,000 60,000,000 54,000,000 50,000,000 50,000,000 50,000,000 64,000,000 49,000,000 50,000,000 49,000,000 46,000,000 46,000,000 47,000,000                                                     
      changes in fair value of derivatives
    -10,000,000                                                                      
      other non-operating income
    1,000,000 -14,000,000 -9,000,000 -40,000,000  1,000,000 2,000,000 1,000,000 -2,000,000 4,000,000 2,000,000 2,000,000 -1,000,000 -3,000,000  1,000,000 4,000,000  25,800,000 10,000,000 15,200,000 9,200,000 900,000 300,000 0.6 0.1 4,100,000 4,300,000 4,400,000 4,400,000 3,199,997.7 0.8 0.8 0.7 399,999.6 0.1 0.2 0.1               -500,000 1,500,000 -1,300,000 -1,700,000 500,000 500,000 6,800,000 -300,000 6,500,000 700,000 3,500,000 200,000 -1,300,000      
      total other expense
    -105,000,000 -120,000,000 -92,000,000 -105,000,000 -47,000,000 -12,000,000 -23,000,000 -8,000,000 -22,000,000 -25,000,000 -25,000,000 -4,000,000 -12,000,000 -83,000,000 -44,000,000 -34,000,000  -111,000,000 -46,900,000 -58,200,000                                                   
      loss from continuing operations before income taxes
    -309,000,000      -61,000,000                       -69,100,000                                         
      income tax benefit
    78,000,000 148,000,000 147,000,000 136,000,000 76,000,000 15,000,000 8,000,000    13,000,000     -334,000,000 -216,000,000 -9,000,000 12,500,000 22,400,000 24,700,000 51,400,000   -22 3.7 489,600,000 -500,000 1,800,000 -15,700,000 252,399,993.2 7.6 -2.6 1.8 12,199,998.3 7.1 2.1                -42,900,000 210,800,000     -69,500,000 -115,700,000 -99,300,000  3,650,000 -1,900,000 17,600,000      
      loss from continuing operations
    -231,000,000      -53,000,000                       -84,800,000                                         
      loss from discontinued operations, net of tax
    -3,000,000                   -300,000     -0.6    -64,300,000      -0.15 -2.7                                   
      net income
    -234,000,000 -470,000,000 -483,000,000 -434,000,000 -230,000,000 9,000,000 -53,000,000 -139,000,000 275,000,000 356,000,000 -42,000,000 -204,000,000 165,000,000 601,000,000 814,000,000 1,282,000,000 795,000,000 57,000,000 73,800,000 1,900,000 -108,100,000 -48,600,000 63,200,000 90,900,000 160.8 -22.1 609,500,000 437,800,000 165,100,000 -84,300,000 363,099,946.8 52.9 30.1 -29.8 199,299,881.5 -27.8 29.5 116.8               274,300,000 391,400,000 221,900,000 741,300,000 426,000,000 423,300,000 393,200,000 297,400,000 260,600,000 93,500,000 108,100,000 58,600,000 45,200,000 -7,600,000 53,900,000 174,900,000 270,200,000 16,700,000 
      yoy
    1.74% -5322.22% 811.32% 212.23% -183.64% -97.47% 26.19% -31.86% 66.67% -40.77% -105.16% -115.91% -79.25% 954.39% 1002.98% 67373.68% -835.43% -217.28% 16.77% -97.91% -67226468.16% 219909402.26% -89.63% -79.24% -100.00% -100.00% 67.86% 827599143.86% 548504883.39% 282885806.04% 82.19% -290.29% 2.03% -125.51%                   -35.61% -7.54% -43.57% 149.26% 63.47% 352.73% 263.74% 407.51% 476.55% -1330.26% 100.56% -66.50% -83.27% -145.51%     
      qoq
    -50.21% -2.69% 11.29% 88.70% -2655.56% -116.98% -61.87% -150.55% -22.75% -947.62% -79.41% -223.64% -72.55% -26.17% -36.51% 61.26% 1294.74% -22.76% 3784.21% -101.76% 122.43% -176.90% -30.47% 56529750.75% -827.60% -100.00% 39.22% 165.17% -295.85% -123.22% 686389213.42% 75.75% -201.01% -100.00% -716906148.56% -194.24% -74.74%                -29.92% 76.39% -70.07% 74.01% 0.64% 7.66% 32.21% 14.12% 178.72% -13.51% 84.47% 29.65% -694.74% -114.10% -69.18% -35.27% 1517.96%  
      net income margin %
    -4.94% -9.53% -10.43% -10.03% -5.03% 0.18% -1.02% -2.72% 4.91% 5.95% -0.79% -4.04% 2.92% 9.48% 13.67% 21.35% 15.76% 1.41% 3.27% 0.12% -9.89% -14.98% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% -Infinity% Infinity% Infinity% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% 
      net income attributable to noncontrolling interests
    -17,000,000 -13,000,000 -12,000,000                                                                    
      net loss attributable to cliffs shareholders
    -251,000,000  -495,000,000    -67,000,000                       -84,300,000                                         
      loss per common share attributable to cliffs shareholders - basic
                                                                          
      continuing operations
    -510,000   -930,000 -520,000  -140,000 -300,000 520,000 680,000 -110,000 -410,000 300,000 1,140,000 1,540,000 2,460,000 1,400,000 80,000 190,000 -20,000 -310,000 -180,000 240,000 340,000 0.59 -0.08 2,100,000 670,000 770,000 -290,000 1,339,999.75 0.07 0.26 -0.11 979,999.49 -0.11 0.07 0.61  190,000  1,020,000     1,720,000 670,000 870,000 660,000 -7,190,000 620,000 1,810,000 2,640,000 1,370,000 4,210,000               
      discontinued operations
                              -50,000 800,000 -220,000  -59,999.95 0.11 -0.16   -0.01  0.01                  -120,000               
      loss per common share attributable to cliffs shareholders - diluted
                                                                          
      other comprehensive income:
                                                                          
      changes in pension and opeb, net of tax
    -26,000,000 -25,000,000 -27,000,000 -81,000,000 -29,000,000 -29,000,000 -28,000,000 60,000,000 -27,000,000 -26,000,000 -27,000,000 1,204,000,000 93,000,000  1,000,000 6,000,000 7,000,000 7,000,000 162,800,000 6,600,000 6,000,000                                                  
      changes in derivative financial instruments, net of tax
    -19,000,000 -45,000,000 101,000,000 17,250,000 2,000,000 47,000,000 20,000,000 -51,000,000 31,000,000 18,000,000 -152,000,000 -186,000,000 61,000,000 -55,000,000 96,000,000 83,000,000 47,000,000 7,000,000 -15,200,000 15,700,000 4,500,000                                                  
      changes in foreign currency translation, net of tax
    -36,000,000 102,000,000                                                                     
      total other comprehensive income
    -81,000,000 32,000,000 75,000,000 -103,000,000 -26,000,000 18,000,000  10,000,000 4,000,000 -8,000,000 -179,000,000 1,020,000,000 152,000,000 -57,000,000 97,000,000 89,000,000 54,000,000 13,000,000 149,200,000 23,900,000 11,200,000                                                  
      comprehensive loss
    -315,000,000  -408,000,000    -62,000,000                                                                
      comprehensive income attributable to noncontrolling interests
    -17,000,000 -13,000,000 -12,000,000 -13,000,000 -12,000,000  -14,000,000 -16,000,000 -11,000,000 -9,000,000 -15,000,000 -10,000,000 -13,000,000 -5,000,000 -13,000,000 -8,000,000 -15,000,000 -16,000,000 -9,800,000 -11,900,000 -15,800,000                                                  
      comprehensive loss attributable to cliffs shareholders
    -332,000,000  -420,000,000    -76,000,000                                                                
      income before income taxes
     -618,000,000 -630,000,000                                                                    
      net income attributable to cliffs shareholders
     -483,000,000  -447,000,000 -242,000,000 2,000,000  -155,000,000 264,000,000 347,000,000 -57,000,000 -214,000,000 152,000,000 596,000,000 801,000,000 1,274,000,000 780,000,000 41,000,000 64,000,000 -10,000,000 -123,900,000 -52,100,000     609,500,000 437,800,000 165,100,000  366,999,942.9 53.4 31.8 -28.1 174,099,905 -25.8 12.8 108  10,600,000 60,200,000    10,900,000  296,300,000 117,200,000 146,000,000 107,000,000 -984,500,000 85,100,000 258,000,000 375,800,000 198,500,000 589,500,000 407,700,000 423,400,000 393,300,000 297,400,000 260,700,000 93,500,000 108,200,000 58,800,000 45,500,000      
      earnings per common share attributable to cliffs shareholders:
                                                                          
      basic
     -970,000                                                                     
      diluted
     -970,000                                                                     
      comprehensive income
     -438,000,000  -537,000,000 -256,000,000 27,000,000  -129,000,000 279,000,000 348,000,000 -221,000,000 816,000,000 317,000,000 544,000,000 911,000,000 1,371,000,000 849,000,000 70,000,000 223,000,000 25,800,000 -96,900,000                                                  
      comprehensive income attributable to cliffs shareholders
     -451,000,000  -550,000,000 -268,000,000 20,000,000  -145,000,000 268,000,000 339,000,000 -236,000,000 806,000,000 304,000,000 539,000,000 898,000,000 1,363,000,000 834,000,000 54,000,000 213,200,000 13,900,000 -112,700,000                                                  
      loss per common share attributable to cliffs shareholders:
                                                                          
      basic
      -1,000,000                                                                    
      diluted
      -1,000,000                                                                    
      changes in foreign currency translation
      1,000,000  1,000,000  -1,000,000     2,000,000 -2,000,000 -2,000,000    -1,000,000 1,600,000 1,600,000 700,000                                                  
      asset impairments
       -19,750,000  -15,000,000 -64,000,000                                                                
      changes in fair value of foreign currency contracts
       -1,750,000 -7,000,000                                                 300,000 1,400,000 -6,200,000 50,400,000 56,300,000 15,000,000 32,500,000 -10,000,000 2,300,000 900,000 8,800,000 79,300,000 -3,300,000     
      income from continuing operations before income taxes
       -570,000,000 -306,000,000 -6,000,000  -108,000,000 303,000,000 458,000,000 -56,000,000 -186,000,000 175,000,000 757,000,000 1,050,000,000 1,615,000,000 1,010,000,000 66,000,000 60,300,000 -20,200,000 -132,500,000 -100,600,000 57,900,000 96,600,000 183.4 -25.8 134,500,000 200,300,000 227,600,000  15 13 79.1 -32.1 29.35 -32.2 27.8 121.8                                 
      income from continuing operations
       -434,000,000 -230,000,000 9,000,000  -138,000,000 274,000,000 356,000,000 -43,000,000 -205,000,000 165,000,000 600,000,000 813,000,000 1,281,000,000 794,000,000 57,000,000 72,800,000 2,200,000 -107,800,000 -49,200,000 63,400,000 91,800,000 161.4 -22.1 624,100,000 199,800,000 229,400,000  381,799,933.2 20.6 76.5 -30.3 219,199,880.9 -25.1 29.9 114.3 -178,499,856.3              274,300,000 391,500,000 221,700,000 758,800,000               
      income from discontinued operations, net of tax
           -1,000,000 1,000,000  1,000,000 1,000,000  1,000,000 1,000,000 1,000,000 1,000,000    -300,000 600,000 -200,000 -900,000   -14,600,000 238,000,000  500,000 -18,699,986.4 32.3 -46.4 0.5   -0.4 2.5                -100,000 200,000 -17,500,000               
      income attributable to noncontrolling interests
       -8,250,000 -12,000,000 -7,000,000 -14,000,000                                                                
      earnings per common share attributable to cliffs shareholders - basic
                                                            2,930,000 3,120,000 1,157,500 2,200,000 1,930,000 690,000 197,500 450,000 360,000 -70,000     
      earnings per common share attributable to cliffs shareholders - diluted
                                                            2,920,000 3,110,000 1,150,000 2,180,000 1,920,000 690,000 195,000 450,000 360,000 -70,000     
      comprehensive loss attributable to noncontrolling interests
         -7,000,000                                                                 
      total other comprehensive loss
          -9,000,000                                                                
      gain on extinguishment of debt
               1,000,000 4,000,000    -22,000,000 -66,000,000 -2,600,000  129,400,000  -4,550,000  -17.9  50,000  200,000          -392,899,607.1                                
      income tax expense
           -30,000,000 -29,000,000 -102,000,000  -101,000,000 -10,000,000 -157,000,000 -237,000,000        -5,775,000 -4,800,000              -7.5                 -107,800,000 -17,800,000 -151,900,000 -142,000,000    -72,300,000         
      income attributable to noncontrolling interest
           -8,750,000 -11,000,000 -9,000,000 -15,000,000 -10,000,000 -13,000,000 -5,000,000 -13,000,000 -8,000,000 -15,000,000 -16,000,000 -9,800,000 -11,900,000 -15,800,000 -3,500,000               -16.7                                  
      other non-operating expense
                  -2,000,000                                                        
      total other income
                    -57,000,000    75,900,000 -21,800,000                                                 
      realization of deferred revenue
                      400,000   34,600,000                                                 
      average number of shares
                                                                          
      basic
                      91,311,250,000 399,399,000,000 399,088,000,000 297,515,000,000 -1,657,000,000 269,960,000,000 275,769 289,525 -411,000,000 297,878,000,000 297,618,000,000 297,266,000,000 288,434,714,229 296,079 296,070 265,164 197,658,813,546 206,279 182,330 171,677 -153,212,846,770              142,380,000,000 142,226,000,000 671,000,000 144,203,000,000 139,000,000,000 135,486,000,000 21,000,000 135,345,000,000 135,319,000,000 135,174,000,000 1,953,000,000 130,840,000,000 125,055,000,000 113,240,000,000 3,866,000,000 104,753,000,000 98,127,000,000 44,968,000,000 
      diluted
                      91,311,250,000 399,399,000,000 399,088,000,000 297,515,000,000 -3,275,000,000 276,578,000,000 285,479 289,525 623,000,000 310,203,000,000 301,275,000,000 297,266,000,000 292,960,709,488 301,075 300,711 265,164 200,144,811,529 206,279 184,557 171,962 -153,212,846,395              142,814,000,000 142,709,000,000 691,000,000 144,989,000,000 139,783,000,000 136,191,000,000 40,000,000 136,213,000,000 136,134,000,000 135,954,000,000 1,983,000,000 131,736,000,000 125,779,000,000 113,240,000,000 1,849,000,000 108,719,000,000 105,227,000,000 52,458,000,000 
      revenues from product sales and services
                                                                          
      product
                          339,450,000 515,000,000 697.4 145.4 646,400,000 684,700,000 672,000,000 220,700,000 2,089,198,447.7 627.5 512 412.8 1,913,498,763 508.6 452.8 275.6  542,500,000 454,300,000 399,500,000 -1,190,795,769.2 1,190,800,000 1,018,600,000 860,900,000 3,892,000,000 1,454,600,000 1,391,600,000 1,082,600,000 4,073,000,000 1,447,900,000 1,546,600,000 1,200,900,000 1,589,300,000 2,124,400,000 1,705,000,000 1,133,000,000 1,341,900,000 1,287,200,000 1,116,200,000 671,500,000 772,100,000 669,900,000 353,100,000 421,100,000 850,400,000 1,110,800,000 921,600,000 412,000,000 
      freight
                          24,500,000 40,600,000 45.8 11.6                                             
      sales margin
                          126,900,000 154,900,000 263 30.9 202,000,000 261,600,000 284,500,000 -3,600,000 501,699,599 160.2 145.1 95.7 389,299,792.2 85.4 91.5 30.9 -193,199,763.5              449,300,000 303,500,000 493,700,000 863,300,000 730,800,000 598,700,000 482,300,000 476,500,000 414,700,000 150,000,000 175,000,000 103,200,000 -11,700,000 42,400,000 285,900,000 365,000,000 426,300,000 82,400,000 
      other operating expense
                                                                          
      other income
                                                                          
      earnings per common share – basic
                                                                          
      earnings per common share – diluted
                                                                          
      liabilities
                                                                          
      current liabilities
                                                                          
      accounts payable
                            188,100,000 171,700,000      102,000,000 111,700,000 91,100,000  81,300,000 91,900,000 77,200,000                                 
      accrued employment costs
                            58,400,000 42,100,000                                             
      accrued interest
                            31,300,000 23,000,000      21,700,000 30,700,000 19,700,000                                     
      partnership distribution payable
                            44,100,000 43,800,000                                             
      other current liabilities
                            115,500,000 113,400,000      125,100,000 108,100,000 95,600,000  102,300,000 137,700,000 138,800,000                                 
      total current liabilities
                            437,400,000 394,000,000      417,500,000 413,300,000 309,300,000  323,500,000 376,100,000 439,800,000                                 
      pension and postemployment benefit liabilities
                            239,300,000 244,200,000      254,300,000 276,100,000 279,100,000  198,500,000 206,400,000 213,800,000                                 
      environmental and mine closure obligations
                            176,700,000 174,400,000      205,400,000 201,900,000 198,200,000  220,200,000 217,400,000 214,300,000                                 
      long-term debt
                            2,104,500,000 2,087,000,000      1,689,400,000 1,611,800,000 1,642,900,000  2,195,900,000 2,489,700,000 2,499,100,000                                 
      other liabilities
                            149,700,000 145,000,000      189,800,000 193,700,000 199,200,000  235,300,000 240,300,000 216,000,000                                 
      total liabilities
                            3,107,600,000 3,044,600,000      2,756,400,000 2,696,800,000 2,628,700,000  3,173,400,000 3,529,900,000 3,583,000,000                                 
      commitments and contingencies
                                                                          
      equity
                                                                          
      shareholders' equity
                                                                          
      preferred stock - no par value
                                                                          
      class a - 3,000,000 shares authorized
                                                                          
      class b - 4,000,000 shares authorized
                                                                          
      common shares - par value 0.125 per share
                                                                          
      authorized - 600,000,000 shares (2018 - 600,000,000 shares);
                                                                          
      issued - 301,886,794 shares (2018 - 301,886,794 shares);
                                                                          
      outstanding - 270,042,018 shares
                            37.7                                              
      capital in excess of par value of shares
                            3,863.6 3,860.2      3,913.2 3,999.7 4,000.1  3,336 3,037.5 3,032.5                                 
      retained deficit
                            -2,952.6 -3,096.8      -4,517.2 -4,570.6 -4,602.4  -4,653.4 -4,627.4 -4,640.4                                 
      cost of 31,844,776 common shares in treasury
                            -391.3                                              
      accumulated other comprehensive loss
                            -271.8 -275.5      -30.8 -19.4 -24.3  -1.2 -9 -12.3                                 
      total equity
                            285.6 261.7                                             
      total liabilities and equity
                            3,393.2 3,306.3                                             
      outstanding - 282,839,140 shares
                             37.7                                             
      cost of 19,047,654 common shares in treasury
                             -263.9                                             
      loss per common share – basic
                                                                          
      loss per common share – diluted
                                                                          
      freight and venture partners' cost reimbursements
                              49,900,000 57,100,000 42,300,000 18,300,000 240,999,823 70.9 57.3 48.8 195,499,882 44.7 43.4 29.9 -137,399,819.1              79,400,000                  
      cost of goods sold and operating expenses
                              -494,300,000 -480,200,000 -429,800,000 -242,600,000 -1,828,498,671.7 -538.2 -424.2 -365.9 -1,719,698,852.8 -467.9 -404.7 -274.6               -1,176,700,000 -961,200,000 -1,168,800,000 -1,279,500,000 -1,075,000,000 -584,500,000 -941,900,000 -869,500,000 -769,600,000 -577,700,000 -645,500,000 -563,200,000 -402,000,000 -422,400,000 -630,400,000 -824,700,000 -582,300,000 -412,000,000 
      other operating income
                                                                          
      loss attributable to noncontrolling interest
                                  0.975 0.5 1.7 1.7 -5.875  -8.8 -1,500,000.9                                
      income per common share attributable to cliffs shareholders – basic
                                                                          
      income per common share attributable to cliffs shareholders – diluted
                                                                          
      loss per common share attributable to cliffs shareholders – basic
                                                                          
      loss per common share attributable to cliffs shareholders – diluted
                                                                          
      accrued expenses
                                   109,400,000 112,800,000 102,900,000  134,200,000 141,100,000 111,100,000                                 
      contingent claims
                                   50,000,000 50,000,000                                      
      derivative liabilities
                                   9,300,000                                       
      cliffs shareholders' deficit
                                                                          
      authorized - 600,000,000 shares (2016 - 400,000,000 shares);
                                                                          
      issued - 301,886,794 shares (2016 - 238,636,794 shares);
                                                                          
      outstanding - 296,503,284 shares
                                   37.7                                       
      cost of 5,383,510 common shares in treasury
                                   -236.2                                       
      total cliffs shareholders' deficit
                                   -833.3 -789.1 -830.1  -1,544.3 -1,830.7 -1,859.4                                 
      noncontrolling interest
                                   0.2 122.4 127.1  143.8 151.8 162.7               16,300,000 15,600,000     -25,000  -100,000     -200,000     
      total deficit
                                   -833.1 -666.7 -703  -1,400.5 -1,678.9 -1,696.7                                 
      total liabilities and deficit
                                   1,923.3 2,030.1 1,925.7  1,772.9 1,851 1,886.3                                 
      miscellaneous - net
                                  27,699,997 -5.9 -3 11.9 -30,699,983.1 -19.6 5.7 -3 -19,099,971.9              28,600,000 9,400,000 14,900,000 64,000,000 -8,200,000 3,800,000 -5,525,000 -22,000,000 -2,200,000 2,100,000 4,825,000 4,900,000 17,000,000 -1,600,000 2,150,000 10,500,000 -1,400,000 1,000,000 
      gain on extinguishment/restructuring of debt
                                  -165,399,834.6 -88.6 -4.9 -71.9 166,299,835.9 -18.3 3.6 178.8                                 
      outstanding - 296,496,321 shares
                                    37.7                                      
      cost of 5,390,473 common shares in treasury
                                    -236.5                                      
      authorized - 400,000,000 shares (2016 - 400,000,000 shares);
                                                                          
      outstanding - 296,398,149 shares
                                     37.7                                     
      cost of 5,488,645 common shares in treasury
                                     -241.2                                     
      short-term liabilities of discontinued operations
                                       5,500,000 4,400,000 4,300,000                                 
      guarantees
                                       200,000 200,000 23,600,000                                 
      insured loss
                                        800,000 84,800,000                                 
      7% series a mandatory convertible, class a, no par value and 1,000 per share liquidation preference
                                                                          
      issued and outstanding - no shares
                                                                          
      authorized - 400,000,000 shares (2015 - 400,000,000 shares);
                                                                          
      issued - 236,346,794 shares (2015 - 159,546,224 shares);
                                                                          
      outstanding - 230,594,581 shares
                                       29.5                                   
      cost of 5,752,213 common shares in treasury
                                       -255.2                                   
      equity loss from ventures, net of tax
                                                                          
      preferred stock dividends
                                                                        -400,000 -900,000 
      net income attributable to cliffs common shareholders
                                      174,099,905 -25.8 12.8 108   60,200,000      260,500,000 104,300,000                       
      cash dividends declared per depositary share
                                           880,000   110,000 440,000 440,000 440,000 1,220,000 440,000 440,000 340,000                     
      issued - 189,622,349 shares (2015 - 159,546,224 shares);
                                                                          
      outstanding - 183,864,626 shares
                                        23.7                                  
      cost of 5,757,723 common shares in treasury
                                        -255.5                                  
      issued - 187,822,349 shares (2015 - 159,546,224 shares);
                                                                          
      outstanding - 181,909,771 shares
                                         23.5                                 
      cost of 5,912,578 common shares in treasury
                                         -262.7                                 
      2012 amended equity plan
                                                                          
      2015 equity plan
                                                                          
      593.2
                                          384,325,000                                
      impairment of goodwill and other long-lived assets
                                                                          
      (25.9
                                                                          
      17.4
                                          55,425,000                                
      income from continuing operations before income taxes and equity loss from ventures
                                          -348,499,686.9                                
      net loss attributable to cliffs common shareholders
                                                                          
      cash dividends declared per common share
                                              37,500 150,000 150,000 150,000 450,000 150,000 150,000 150,000                     
      item 2.
                                                                          
      item 3.
                                                                          
      item 4.
                                                                          
      part ii - other information
                                                                          
      item 1.
                                                                          
      item 1a.
                                                                          
      item 6.
                                                                          
      signatures
                                                                          
      498.1
                                                                          
      (31.6
                                                                          
      (65.7
                                                                          
      income from continuing operations before income taxes and equity income from ventures
                                                        317,700,000 187,600,000 322,600,000 765,500,000 589,200,000 562,300,000 402,100,000 409,500,000 351,700,000 169,200,000 153,400,000 81,400,000 53,100,000 2,700,000     
      equity income from ventures, net of tax
                                                                          
      446.0
                                                                          
      (8.9
                                                                          
      270.0
                                                                          
      item 5.
                                                                          
      1,298.2
                                                                          
      exploration costs
                                                        -29,100,000 -18,800,000 -25,100,000 -26,600,000 -18,200,000 -10,600,000             
      (7,886.6
                                                                          
      (40.3
                                                                          
      loss (income) attributable to noncontrolling interest
                                                                          
      1,100.8
                                                                          
      (103.7
                                                                          
      (42.6
                                                                          
      940.0
                                                                          
      (113.9
                                                                          
      (41.5
                                                                          
      1,546.6
                                                                          
      (124.7
                                                                          
      (45.9
                                                                          
      1,488.5
                                                                          
      (6.2
                                                                          
      (43.5
                                                                          
      net income attributable to common shareholders
                                                    133,100,000 97,100,000                     
      1,140.5
                                                                          
      (69.6
                                                                          
      (48.0
                                                                          
      equity income from ventures
                                                        -500,000 -6,900,000 6,900,000 11,100,000 -11,300,000 3,000,000 5,100,000 3,600,000 8,200,000 -3,400,000 -9,900,000 -20,900,000 -25,500,000 -9,200,000 -8,900,000 -13,100,000 -6,200,000 -6,900,000 
      4
                                                                          
      5
                                                                          
      6
                                                                          
      7
                                                                          
      39
                                                                          
      67
                                                                          
      68
                                                                          
      70
                                                                          
      71
                                                                          
      72
                                                                          
      1,544.9
                                                                          
      consolidated thompson acquisition costs
                                                          -400,000 -2,100,000 -18,000,000              
      (122.0
                                                                          
      (43.9
                                                                          
      less: income attributable to noncontrolling interest
                                                          42,525,000 151,800,000 18,300,000              
      cash dividends declared per share
                                                      1.53 0.63 0.63 0.28 0.28 0.28 0.14 0.14 0.143 0.14           
      less: income attributable to
                                                                          
      other comprehensive income, net of tax
                                                                          
      pension and opeb liability
                                                        7.1                  
      unrealized net income on marketable securities
                                                        -2.8                  
      unrealized net gain on foreign currency translation
                                                        -17.4                  
      unrealized net gain on derivative financial instruments
                                                        -4.4                  
      other comprehensive income
                                                        -17.5                  
      less: other comprehensive loss attributable to the noncontrolling interest
                                                        -1.5                  
      total comprehensive income attributable to cliffs shareholders
                                                        239                  
      freight and venture partners’ cost reimbursements
                                                         63,800,000 73,200,000 18,400,000 100,800,000 50,200,000 82,300,000 58,800,000 68,100,000 56,200,000 48,400,000 -3,500,000 37,200,000 43,700,000 65,900,000 78,900,000 87,000,000 82,400,000 
      interest income
                                                         2,000,000 1,900,000 2,700,000 2,400,000 2,500,000 1,500,000 3,300,000 2,700,000 2,400,000 3,100,000 1,900,000 2,400,000 3,400,000 8,400,000 5,900,000 6,300,000 5,600,000 
      gain on acquisition of controlling interests
                                                              12,300,000 2,100,000  60,600,000         
      less: net income attributable to noncontrolling interest
                                                             -100,000     -100,000 -200,000 -300,000      
      casualty recoveries
                                                                 3,300,000      500,000 10,000,000  
      royalties and management fee revenue
                                                              4,400,000 2,800,000 2,700,000 2,200,000 1,300,000 -200,000 1,300,000 2,400,000 5,700,000 5,100,000 7,100,000 3,800,000 
      gain on sale of assets
                                                              650,000  800,000 1,800,000 375,000 1,000,000 -500,000      
      less: loss attributable to
                                                                          
      cash dividends per share
                                                                0.14 0.088 0.093 0.04 0.04 0.088     
      income applicable to common shares
                                                                  24,225,000 58,800,000 45,500,000 -7,400,000 53,900,000 174,900,000 269,800,000 15,800,000 
      other non-operating income - net
                                                                     500,000     
      benefit from income taxes
                                                                     -1,100,000 29,400,000 -52,000,000 -107,400,000 -14,300,000 
      less: net income attributable to
                                                                          
      net income attributable to cliffs
                                                                     -7,400,000     
      gain on sale of other assets
                                                                      5,275,000 100,000 19,500,000  
      changes in fair value of derivative instruments
                                                                      -93,900,000 -94,300,000   
      other - net
                                                                      850,000 3,300,000 300,000  
      income from continuing operations before income taxes, minority interest and equity income from ventures
                                                                      25,500,000 243,600,000 406,200,000 41,000,000 
      minority interest
                                                                      7,900,000 -3,600,000 -22,400,000 -3,100,000 
      earnings per common share - basic
                                                                      1,180,000 1,670,000 2,750,000 350,000 
      earnings per common share - diluted
                                                                      1,085,000 1,610,000 2,570,000 320,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2018-01-01 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 
                                                                             
        assets
                                                                             
        current assets:
                                                                             
        cash and cash equivalents
      45,000,000 57,000,000 66,000,000 61,000,000 57,000,000 54,000,000 39,000,000 110,000,000 30,000,000 198,000,000 31,000,000 34,000,000 59,000,000 26,000,000 56,000,000 47,000,000 35,000,000 42,000,000 73,000,000 110,000,000 112,000,000 56,000,000 73,700,000 186,900,000 352,600,000 399,300,000 377,200,000 430,200,000 978,300,000 978,300,000 978,300,000 1,007,700,000 978,300,000 260,800,000 321,500,000 295,300,000 323,400,000 132,200,000 108,200,000 59,900,000 285,200,000 270,200,000  355,700,000 244,000,000 359,900,000 364,000,000 335,500,000 298,800,000 263,300,000 287,200,000 195,200,000 36,300,000 159,200,000 122,300,000 521,600,000 545,100,000 238,100,000 2,267,700,000 1,566,700,000 969,400,000 527,500,000 550,400,000 502,700,000 359,900,000 274,600,000 97,300,000 179,000,000 388,300,000  186,500,000 
        accounts receivable
      1,882,000,000 1,442,000,000 1,797,000,000 1,783,000,000 1,798,000,000 1,576,000,000 1,583,000,000 1,773,000,000 1,868,000,000 1,840,000,000 2,122,000,000 2,290,000,000 2,216,000,000 1,960,000,000 2,301,000,000 2,571,000,000 2,667,000,000 2,348,000,000 2,062,000,000 1,659,000,000 1,169,000,000 653,700,000 482,200,000 560,800,000 94,000,000 164,900,000 193,100,000 20,100,000 183,300,000 183,300,000 183,300,000 217,200,000 183,300,000 63,900,000 76,700,000 61,100,000 128,700,000 49,200,000 61,500,000 41,900,000 40,200,000 53,400,000  87,100,000 166,200,000 198,300,000 130,600,000 270,000,000 291,700,000 259,100,000 272,300,000 329,000,000 285,900,000 310,800,000 247,200,000 304,200,000 364,800,000 317,200,000 506,500,000 359,100,000 214,100,000 255,300,000 131,400,000 103,500,000 87,200,000 41,900,000 79,600,000 68,500,000 137,800,000   
        inventories
      4,591,000,000 4,772,000,000 4,683,000,000 4,699,000,000 4,886,000,000 5,094,000,000 4,236,000,000 4,199,000,000 4,449,000,000 4,460,000,000 4,592,000,000 4,727,000,000 4,923,000,000 5,130,000,000 5,542,000,000 5,784,000,000 5,562,000,000 4,505,000,000 4,280,000,000 3,932,000,000 3,828,000,000 1,795,100,000 1,933,600,000 2,148,800,000 317,400,000  219,000,000 312,700,000 87,000,000 87,000,000 87,000,000 132,000,000 87,000,000 207,700,000 287,600,000 250,800,000 178,400,000 317,300,000 391,200,000 406,300,000 329,600,000 351,700,000  408,500,000 516,700,000 648,800,000 609,800,000 391,400,000 438,400,000 529,200,000 630,100,000 436,500,000 526,700,000 741,000,000 695,900,000 475,700,000 528,200,000 605,300,000 496,400,000 269,200,000 308,500,000 371,800,000 368,200,000 272,500,000 292,300,000 349,400,000 328,900,000 265,400,000 327,200,000  389,800,000 
        other current assets
      192,000,000 164,000,000 143,000,000 144,000,000 223,000,000 183,000,000 169,000,000 110,000,000 122,000,000 138,000,000 196,000,000 114,000,000 246,000,000 306,000,000 426,000,000 366,000,000 295,000,000 251,000,000 159,000,000 160,000,000 165,000,000 115,000,000 90,200,000 107,400,000 29,500,000 40,700,000 42,300,000 41,000,000 11,100,000 11,100,000 24,400,000 28,000,000 24,400,000 24,800,000 88,800,000 76,600,000 54,100,000 47,600,000 45,300,000 26,000,000 30,300,000 138,100,000  190,000,000 206,100,000 221,400,000 363,000,000 236,400,000 310,600,000 316,300,000 297,900,000 216,200,000 322,100,000 219,800,000 192,500,000 168,300,000 144,000,000 152,100,000 137,600,000 114,800,000 89,700,000 91,000,000 78,100,000 66,900,000 90,600,000 161,600,000 162,400,000     
        total current assets
      6,710,000,000 6,435,000,000 6,689,000,000 6,687,000,000 6,964,000,000 6,907,000,000 6,027,000,000 6,192,000,000 6,469,000,000 6,636,000,000 6,941,000,000 7,165,000,000 7,444,000,000 7,422,000,000 8,325,000,000 8,768,000,000 8,559,000,000 7,146,000,000 6,574,000,000 5,861,000,000 5,298,000,000 2,628,800,000 2,642,300,000 3,065,600,000 897,900,000 1,064,600,000 1,119,400,000 1,126,000,000 1,581,400,000 1,581,400,000 1,581,400,000 1,581,400,000 1,581,400,000 791,100,000 908,300,000 813,200,000 824,600,000 699,600,000 779,200,000 792,000,000 982,700,000 1,075,900,000  1,524,400,000 1,360,600,000 1,663,800,000 1,672,300,000 1,560,000,000 1,669,600,000 1,665,900,000 1,823,900,000 1,650,000,000 1,665,400,000 1,742,600,000 1,587,300,000 1,790,700,000 1,904,800,000 1,688,300,000 3,713,900,000 2,583,700,000 2,022,900,000 1,630,600,000 1,470,500,000 1,161,200,000 1,016,300,000 949,200,000 792,500,000 861,700,000 1,212,200,000  961,300,000 
        non-current assets:
                                                                             
        property, plant and equipment
      9,345,000,000 9,481,000,000 9,508,000,000 9,620,000,000 9,797,000,000 9,942,000,000 8,687,000,000 8,728,000,000 8,771,000,000 8,895,000,000 8,837,000,000 8,878,000,000 8,950,000,000 9,070,000,000 9,030,000,000 9,047,000,000 9,012,000,000 8,974,000,000 8,982,000,000 9,014,000,000 8,743,000,000 4,550,700,000 4,547,900,000 4,549,800,000 1,929,000,000 1,769,900,000 1,597,300,000 1,410,300,000 1,033,800,000 1,033,800,000 1,033,800,000 1,051,000,000 1,033,800,000 993,800,000 999,100,000 995,000,000 984,400,000 990,100,000 993,100,000 1,009,600,000 1,059,000,000 1,052,600,000  1,047,200,000 3,207,900,000 11,004,800,000 11,086,000,000 11,153,400,000 11,354,800,000 11,189,600,000 11,236,300,000 11,207,300,000 11,030,700,000 10,882,100,000 10,766,700,000 10,524,600,000 9,835,300,000 9,802,400,000 4,021,500,000 3,979,200,000 3,897,700,000 2,985,200,000 3,069,900,000 2,592,600,000 2,556,300,000 2,485,400,000 2,382,400,000 2,456,100,000    
        goodwill
      1,800,000,000 1,814,000,000 1,796,000,000 1,814,000,000 1,767,000,000 1,768,000,000 1,005,000,000 1,005,000,000 1,005,000,000 1,005,000,000 1,130,000,000 1,130,000,000 1,130,000,000 1,130,000,000 1,141,000,000 1,149,000,000 1,127,000,000 1,072,000,000 1,070,000,000 994,000,000 1,406,000,000 144,000,000 139,300,000 143,300,000                         158,600,000 157,200,000 167,600,000 167,400,000 1,167,200,000 1,166,100,000 1,166,900,000 1,152,100,000 1,237,700,000 1,227,300,000 197,300,000 196,500,000 199,800,000 87,100,000 92,200,000 74,600,000 73,000,000    21,300,000   
        intangible assets
      1,102,000,000 1,135,000,000 1,142,000,000 1,185,000,000 1,150,000,000 1,170,000,000                190,100,000 192,600,000 210,000,000                         110,800,000 115,000,000 124,500,000 129,000,000 133,800,000 137,900,000 143,000,000 147,000,000 149,300,000 159,500,000 171,700,000 175,800,000 178,700,000 170,900,000 178,700,000 114,800,000 116,300,000 115,100,000 107,400,000 109,600,000 91,500,000   
        pension and opeb assets
      515,000,000 469,000,000 469,000,000 453,000,000 443,000,000 427,000,000 378,000,000 354,000,000 344,000,000 329,000,000                                                              
        other non-current assets
      643,000,000 678,000,000 686,000,000 712,000,000 715,000,000 733,000,000 699,000,000 649,000,000 647,000,000 672,000,000 759,000,000 751,000,000 758,000,000 777,000,000 802,000,000 1,075,000,000 1,070,000,000 804,000,000 787,000,000 784,000,000 787,000,000 240,100,000 245,000,000 215,100,000 154,700,000 114,900,000 118,300,000 113,800,000 101,600,000 101,600,000 101,600,000 104,700,000 101,600,000 138,400,000 122,700,000 117,500,000 114,900,000 83,200,000 78,700,000 84,700,000 93,800,000 143,000,000  131,000,000   444,500,000 408,500,000 196,100,000 195,700,000 200,500,000 193,600,000 170,400,000 212,200,000 186,800,000 191,200,000 222,500,000 230,600,000 196,100,000  192,400,000 186,500,000 211,100,000  216,100,000 230,100,000 174,900,000     
        total assets
      20,115,000,000 20,012,000,000 20,290,000,000 20,471,000,000 20,836,000,000 20,947,000,000 16,796,000,000 16,928,000,000 17,236,000,000 17,537,000,000 18,059,000,000 18,303,000,000 18,652,000,000 18,755,000,000 19,688,000,000 20,039,000,000 19,768,000,000 18,066,000,000 17,746,000,000 17,215,000,000 16,771,000,000 8,480,900,000 8,490,700,000 8,912,300,000 3,503,800,000 3,491,200,000 3,393,200,000 3,306,300,000 2,990,200,000 2,990,200,000 2,990,200,000 2,990,200,000 2,990,200,000 1,923,300,000 2,030,100,000 1,925,700,000 1,923,900,000 1,772,900,000 1,851,000,000 1,886,300,000 2,135,500,000 2,271,500,000  2,702,600,000 4,811,200,000 13,102,400,000 13,202,800,000 13,121,900,000 13,566,700,000 13,594,900,000 13,821,900,000 13,574,900,000 15,296,800,000 15,194,300,000 14,893,300,000 14,541,700,000 13,945,300,000 13,671,700,000 8,952,300,000 7,778,200,000 7,078,900,000 5,636,300,000 5,531,900,000 4,639,300,000 4,511,200,000 4,296,400,000 4,025,800,000 4,111,100,000 4,309,200,000  3,301,000,000 
        liabilities and equity
                                                                             
        current liabilities:
                                                                             
        accounts payable
      2,011,000,000 1,893,000,000 1,914,000,000 1,947,000,000 2,020,000,000 2,008,000,000 1,983,000,000 2,080,000,000 2,051,000,000 2,099,000,000 2,076,000,000 2,116,000,000 2,173,000,000 2,186,000,000 2,361,000,000 2,594,000,000 2,271,000,000 1,828,000,000 1,665,000,000 1,743,000,000 1,575,000,000 710,700,000 504,800,000 825,300,000 193,200,000 212,800,000 188,100,000 171,700,000 100,900,000 100,900,000 100,900,000 129,100,000 100,900,000 102,000,000 111,700,000 91,100,000 107,600,000 81,300,000 91,900,000 77,200,000 106,300,000 102,300,000  114,300,000 295,800,000 266,000,000 329,200,000 345,500,000 350,800,000 306,600,000 299,900,000 555,500,000 422,100,000 385,200,000 394,500,000 380,300,000 370,100,000 306,900,000 266,900,000 266,500,000 214,400,000 234,100,000 220,900,000 178,900,000 171,500,000 131,400,000 159,800,000 201,000,000 194,600,000  148,500,000 
        accrued employment costs
      457,000,000 517,000,000 565,000,000 521,000,000 443,000,000 447,000,000 413,000,000 431,000,000 449,000,000 511,000,000 467,000,000 455,000,000 388,000,000 429,000,000 479,000,000 536,000,000 541,000,000 592,000,000 550,000,000 465,000,000 460,000,000     57,300,000 58,400,000 42,100,000 52,700,000        56,100,000    53,000,000       129,000,000    135,600,000    144,200,000    129,900,000    78,400,000    98,900,000 80,900,000  59,300,000 
        accrued expenses
      346,000,000 396,000,000 339,000,000 348,000,000 361,000,000 375,000,000 379,000,000 296,000,000 318,000,000 380,000,000 263,000,000 261,000,000 271,000,000                 79,100,000 79,100,000 107,100,000 79,100,000 109,400,000 112,800,000 102,900,000 41,100,000 134,200,000 141,100,000 111,100,000 85,700,000 149,800,000  167,100,000 325,500,000 338,000,000 363,500,000 206,400,000 404,700,000 425,400,000 470,500,000 258,900,000 485,200,000 402,100,000 380,600,000 165,000,000 359,900,000 361,600,000 257,100,000 136,700,000 233,700,000 209,900,000 185,500,000 77,400,000 144,700,000 125,300,000 146,300,000 46,100,000 83,700,000  54,800,000 
        other current liabilities
      509,000,000 496,000,000 462,000,000 461,000,000 442,000,000 492,000,000 480,000,000 511,000,000 578,000,000 518,000,000 488,000,000 576,000,000 628,000,000 934,000,000 740,000,000 857,000,000 939,000,000 708,000,000 620,000,000 574,000,000 596,000,000 224,000,000 244,900,000 245,700,000 52,000,000 121,700,000 115,500,000 113,400,000 65,000,000 68,800,000 68,800,000 87,600,000 68,800,000 125,100,000 108,100,000 95,600,000 91,400,000 102,300,000 137,700,000 138,800,000 87,300,000 235,600,000  300,100,000 262,300,000 272,400,000 253,500,000 203,000,000 188,600,000 206,100,000 226,600,000 225,100,000 197,800,000 204,700,000 175,700,000 148,100,000 185,700,000 178,500,000 131,700,000 80,600,000 124,100,000 102,100,000 106,900,000 59,100,000 173,200,000 75,900,000 71,300,000     
        total current liabilities
      3,323,000,000 3,302,000,000 3,280,000,000 3,277,000,000 3,266,000,000 3,322,000,000 3,255,000,000 3,318,000,000 3,396,000,000 3,508,000,000 3,294,000,000 3,408,000,000 3,460,000,000 3,549,000,000 3,580,000,000 3,987,000,000 3,751,000,000 3,279,000,000 2,986,000,000 2,933,000,000 2,929,000,000 1,214,100,000 1,038,000,000 1,370,800,000 409,400,000 458,500,000 437,400,000 394,000,000 455,000,000 455,000,000 455,000,000 455,000,000 455,000,000 417,500,000 413,300,000 309,300,000 391,100,000 323,500,000 376,100,000 439,800,000 581,700,000 669,900,000  846,500,000 1,118,300,000 1,037,500,000 1,043,100,000 1,085,500,000 1,060,500,000 1,154,600,000 1,101,400,000 1,381,500,000 1,714,300,000 1,534,300,000 1,384,600,000 1,493,300,000 1,299,400,000 1,191,000,000 1,107,200,000 1,028,700,000 690,000,000 714,300,000 746,300,000 570,400,000 560,000,000 540,400,000 780,600,000 844,900,000 1,143,800,000  384,600,000 
        non-current liabilities:
                                                                             
        long-term debt
      7,763,000,000 7,253,000,000 8,039,000,000 7,727,000,000 7,601,000,000 7,065,000,000 3,774,000,000 3,507,000,000 3,664,000,000 3,137,000,000 3,458,000,000 3,963,000,000 4,559,000,000 4,249,000,000 4,475,000,000 4,668,000,000 5,028,000,000 5,350,000,000 5,368,000,000 5,734,000,000 5,390,000,000 4,309,800,000 4,451,600,000 4,357,100,000 2,113,800,000 2,109,100,000 2,104,500,000 2,087,000,000 2,304,200,000 2,304,200,000 2,304,200,000 2,304,200,000 2,304,200,000 1,689,400,000 1,611,800,000 1,642,900,000 2,175,100,000 2,195,900,000 2,489,700,000 2,499,100,000 2,699,400,000 2,721,600,000  2,880,900,000 3,012,500,000 3,293,000,000 3,194,800,000 3,022,600,000 3,319,600,000 3,323,300,000 3,433,000,000 3,960,700,000 3,514,300,000 3,614,100,000 3,583,800,000 3,608,700,000 3,883,500,000 3,898,800,000 2,412,500,000  1,713,000,000 725,000,000 725,000,000  525,000,000 525,000,000      
        pension and opeb liabilities
      631,000,000 655,000,000 645,000,000 693,000,000 711,000,000 751,000,000 666,000,000 757,000,000 791,000,000 821,000,000            1,130,600,000 1,159,600,000 1,171,600,000 311,500,000                                               
        deferred income taxes
      305,000,000 375,000,000 506,000,000 612,000,000 723,000,000 858,000,000 567,000,000 621,000,000 628,000,000 639,000,000 662,000,000 545,000,000 527,000,000 590,000,000    70,000,000 333,000,000 562,000,000 537,000,000 519,500,000 506,500,000 486,400,000 459,500,000 437,500,000 443,300,000 466,600,000                 26,000,000 1,034,100,000 1,195,700,000 1,146,500,000 5,300,000 202,800,000 137,300,000 91,800,000 612,300,000 522,200,000 511,700,000 209,500,000 79,900,000 54,200,000 126,400,000 140,300,000 62,100,000 70,300,000 114,200,000 151,100,000 214,700,000 208,200,000 251,200,000 251,200,000 198,400,000  40,400,000 
        asset retirement and environmental obligations
      693,000,000 682,000,000 614,000,000 613,000,000 609,000,000 601,000,000                                                                  
        other non-current liabilities
      1,381,000,000 1,422,000,000 1,499,000,000 1,507,000,000 1,442,000,000 1,453,000,000 1,439,000,000 1,353,000,000 1,315,000,000 1,310,000,000 1,362,000,000 1,307,000,000 1,276,000,000 1,267,000,000 1,614,000,000 1,549,000,000 1,483,000,000 1,374,000,000 1,272,000,000 1,175,000,000 1,260,000,000 280,700,000 278,400,000 263,500,000 146,300,000                                               
        total liabilities
      14,096,000,000 13,689,000,000 14,583,000,000 14,429,000,000 14,352,000,000 14,050,000,000 9,701,000,000 9,556,000,000 9,794,000,000 9,415,000,000 9,795,000,000 10,259,000,000 10,859,000,000 10,713,000,000 12,420,000,000 13,045,000,000 13,160,000,000 13,776,000,000 13,467,000,000 13,758,000,000 13,692,000,000 7,357,200,000 7,372,500,000 7,681,300,000 3,145,900,000 3,131,300,000 3,107,600,000 3,044,600,000 3,400,300,000 3,400,300,000 3,400,300,000 3,400,300,000 3,400,300,000 2,756,400,000 2,696,800,000 2,628,700,000 3,254,400,000 3,173,400,000 3,529,900,000 3,583,000,000 3,947,100,000 4,031,000,000  4,484,700,000 4,988,500,000 6,272,800,000 6,367,200,000 6,237,600,000 6,632,100,000 6,811,100,000 6,962,900,000 7,814,000,000 7,607,600,000 7,586,800,000 7,459,400,000 7,502,000,000 7,093,500,000 7,151,700,000 4,678,400,000 3,939,500,000 3,627,600,000 2,645,400,000 2,705,700,000 2,102,300,000 2,104,300,000 2,030,900,000 2,281,800,000 2,357,100,000 2,551,500,000  1,810,700,000 
        commitments and contingencies
                                                                             
        equity:
                                                                             
        common shares - par value 0.125 per share
                                                                             
        authorized - 1,200,000,000 shares (2025 - 1,200,000,000 shares);
                                                                             
        issued - 606,051,530 shares (2025 - 606,051,530 shares);
                                                                             
        outstanding - 570,397,492 shares
      76,000,000                                                                       
        capital in excess of par value of shares
      5,732,000,000 5,736,000,000 4,783,000,000 4,768,000,000 4,756,000,000 4,758,000,000 4,875,000,000 4,864,000,000 4,851,000,000 4,861,000,000 4,850,000,000 4,841,000,000 4,832,000,000 4,871,000,000 4,864,000,000 4,855,000,000 4,848,000,000 4,887,000,000 5,491,000,000 5,487,000,000 5,431,000,000 4,446,300,000 4,443,600,000 4,450,200,000 3,872,100,000 3,867,700,000 3,863,600,000 3,860,200,000      3,913,200,000 3,999,700,000 4,000,100,000 3,347,000,000 3,336,000,000 3,037,500,000 3,032,500,000 2,298,900,000 2,307,600,000  2,308,100,000 2,312,200,000 2,318,000,000 2,321,100,000 2,329,500,000 2,029,800,000 2,024,300,000 2,020,900,000 1,774,700,000 1,766,200,000 1,759,600,000 1,755,100,000 1,770,800,000 1,766,100,000 1,760,300,000 903,300,000 896,300,000 875,100,000 871,300,000 868,500,000 695,400,000 693,300,000 696,500,000 439,700,000 442,200,000 161,800,000  122,400,000 
        retained deficit
      -766,000,000                 -894,000,000 -2,168,000,000 -2,948,000,000 -2,989,000,000 -3,052,500,000 -3,042,500,000 -2,918,500,000 -2,842,400,000 -2,889,000,000 -2,952,600,000 -3,096,800,000      -4,517,200,000 -4,570,600,000 -4,602,400,000 -4,574,300,000 -4,653,400,000 -4,627,400,000 -4,640,400,000 -4,748,400,000 -4,688,100,000  -4,733,200,000                            
        cost of 35,654,038 common shares in treasury
      -645,000,000                                                                       
        accumulated other comprehensive income
      1,425,000,000 1,492,000,000 1,563,000,000 1,644,000,000 1,612,000,000 1,537,000,000 1,640,000,000 1,666,000,000 1,648,000,000 1,657,000,000 1,647,000,000 1,643,000,000 1,651,000,000 1,830,000,000 810,000,000 658,000,000 715,000,000 23,000,000                                      -92,600,000 -59,300,000 95,900,000 70,000,000 45,900,000 13,000,000          20,200,000 
        total cliffs shareholders' equity
      5,822,000,000 6,116,000,000 5,466,000,000 5,819,000,000 6,254,000,000 6,664,000,000 6,854,000,000 7,110,000,000 7,201,000,000 7,887,000,000 8,020,000,000 7,802,000,000 7,546,000,000 7,791,000,000 7,008,000,000 6,729,000,000 6,339,000,000 3,996,000,000 3,233,000,000 2,389,000,000 2,018,000,000 810,600,000 792,900,000 903,200,000                     30,700,000 6,027,600,000 6,019,500,000 6,069,500,000 5,779,700,000 5,631,200,000 5,704,600,000 4,632,700,000 6,336,800,000 6,295,000,000                  
        noncontrolling interests
      197,000,000 207,000,000 241,000,000 223,000,000 230,000,000 233,000,000 241,000,000 262,000,000 241,000,000 235,000,000                                                              
        total equity
      6,019,000,000 6,323,000,000 5,707,000,000 6,042,000,000 6,484,000,000 6,897,000,000 7,095,000,000 7,372,000,000 7,442,000,000 8,122,000,000 8,264,000,000 8,044,000,000 7,793,000,000 8,042,000,000 7,268,000,000 6,994,000,000 6,608,000,000 4,290,000,000 3,541,000,000 2,719,000,000 2,341,000,000 1,123,700,000 1,118,200,000 1,231,000,000 357,900,000 359,900,000 285,600,000 261,700,000 -410,100,000                -177,300,000 6,829,600,000 6,835,600,000 6,884,300,000 6,934,600,000 6,783,800,000 6,859,000,000 5,760,900,000 7,689,200,000 7,607,500,000 7,433,900,000 7,039,700,000 6,851,800,000 6,520,000,000 4,273,900,000 3,838,700,000 3,451,300,000 2,990,900,000 2,826,200,000 2,537,000,000 2,406,900,000 2,265,500,000 1,744,000,000     
        total liabilities and equity
      20,115,000,000 20,012,000,000 20,290,000,000 20,471,000,000 20,836,000,000 20,947,000,000 16,796,000,000 16,928,000,000 17,236,000,000 17,537,000,000 18,059,000,000 18,303,000,000 18,652,000,000 18,755,000,000 19,688,000,000 20,039,000,000 19,768,000,000     8,480,900,000 8,490,700,000 8,912,300,000 3,503,800,000 3,491,200,000 3,393,200,000 3,306,300,000 2,990,200,000                4,811,200,000 13,102,400,000 13,202,800,000 13,121,900,000 13,566,700,000 13,594,900,000 13,821,900,000 13,574,900,000 15,296,800,000 15,194,300,000 14,893,300,000 14,541,700,000 13,945,300,000 13,671,700,000 8,952,300,000 7,778,200,000 7,078,900,000 5,636,300,000 5,531,900,000 4,639,300,000 4,511,200,000 4,296,400,000 4,025,800,000     
        authorized - 1,200,000,000 shares (2024 - 1,200,000,000 shares);
                                                                             
        issued - 606,051,530 shares (2024 - 531,051,530 shares);
                                                                             
        outstanding - 569,759,243 shares
       76,000,000                                                                      
        retained earnings
       -529,000,000 -286,000,000 1,000,000 484,000,000 979,000,000 1,426,000,000 1,668,000,000 1,666,000,000 1,733,000,000 1,888,000,000 1,624,000,000 1,277,000,000 1,334,000,000 1,548,000,000 1,396,000,000 800,000,000                            -2,639,600,000 3,276,000,000 3,300,900,000 3,407,300,000 3,483,300,000 3,401,900,000 3,291,700,000 3,217,700,000 4,925,700,000 4,929,400,000 4,760,300,000 4,424,300,000 4,266,200,000 3,717,700,000 3,328,800,000 2,924,100,000 2,550,100,000 2,296,400,000 2,054,800,000 1,973,100,000 1,876,400,000 1,822,900,000 1,782,700,000 1,799,900,000 1,756,300,000  1,324,900,000 
        cost of 36,292,287 common shares in treasury
       -659,000,000                                                                      
        issued - 531,051,530 shares (2024 - 531,051,530 shares);
                                                                             
        outstanding - 494,699,774 shares
        66,000,000                                                                     
        cost of 36,351,756 common shares in treasury
        -660,000,000                                                                     
        outstanding - 494,679,326 shares
         66,000,000                                                                    
        cost of 36,372,204 common shares in treasury
         -660,000,000                                                                    
        outstanding - 494,490,795 shares
          66,000,000                                                                   
        cost of 36,560,735 common shares in treasury
          -664,000,000                                                                   
        authorized - 1,200,000,000 shares (2023 - 1,200,000,000 shares);
                                                                             
        issued - 531,051,530 shares (2023 - 531,051,530 shares);
                                                                             
        outstanding - 493,948,905 shares
           66,000,000                                                                  
        cost of 37,102,625 common shares in treasury
           -676,000,000                                                                  
        outstanding - 468,067,482 shares
            66,000,000                                                                 
        cost of 62,984,048 common shares in treasury
            -1,153,000,000                                                                 
        outstanding - 468,038,839 shares
             66,000,000                                                                
        cost of 63,012,691 common shares in treasury
             -1,154,000,000                                                                
        outstanding - 475,472,486 shares
              66,000,000                                                               
        cost of 55,579,044 common shares in treasury
              -1,030,000,000                                                               
        authorized - 1,200,000,000 shares (2022 - 1,200,000,000 shares);
                                                                             
        issued - 531,051,530 shares (2022 - 531,051,530 shares);
                                                                             
        outstanding - 504,886,773 shares
               66,000,000                                                              
        cost of 26,164,757 common shares in treasury
               -430,000,000                                                              
        pension and opeb, asset
                392,000,000 379,000,000 370,000,000 356,000,000 390,000,000                                                         
        pension liability, non-current
                456,000,000 461,000,000 465,000,000 473,000,000 464,000,000 527,000,000 552,000,000                                                       
        opeb liability, non-current
                563,000,000 575,000,000 572,000,000 585,000,000 2,287,000,000 2,314,000,000 2,346,000,000                                                       
        outstanding - 504,849,719 shares
                66,000,000                                                             
        cost of 26,201,811 common shares in treasury
                -431,000,000                                                             
        noncontrolling interest
                244,000,000 242,000,000 247,000,000 251,000,000 260,000,000 265,000,000 269,000,000 294,000,000 308,000,000 330,000,000 323,000,000 313,100,000 325,300,000 327,800,000     200,000 200,000 200,000 200,000 200,000 200,000 122,400,000 127,100,000 133,800,000 143,800,000 151,800,000 162,700,000 169,800,000 172,500,000  213,600,000 -208,000,000 802,000,000 816,100,000 814,800,000 1,154,900,000 1,152,600,000 1,154,400,000 1,128,200,000 1,352,400,000 1,312,500,000 1,293,900,000 1,254,700,000 1,128,400,000 973,800,000 900,000 -7,200,000 14,400,000 -8,900,000 -4,100,000 -5,800,000 1,200,000 400,000 6,400,000     
        outstanding - 508,679,179 shares
                 66,000,000                                                            
        cost of 22,372,351 common shares in treasury
                 -372,000,000                                                            
        outstanding - 515,052,745 shares
                  66,000,000                                                           
        cost of 15,998,785 common shares in treasury
                  -280,000,000                                                           
        authorized - 1,200,000,000 shares (2021 - 1,200,000,000 shares);
                                                                             
        issued - 531,051,530 shares (2021 - 506,832,537 shares);
                                                                             
        outstanding - 513,340,779 shares
                   66,000,000                                                          
        cost of 17,710,751 common shares in treasury
                   -310,000,000                                                          
        outstanding - 515,297,720 shares
                    66,000,000                                                         
        cost of 15,753,810 common shares in treasury
                    -280,000,000                                                         
        outstanding - 517,293,151 shares
                     66,000,000                                                        
        cost of 13,758,379 common shares in treasury
                     -246,000,000                                                        
        outstanding - 524,714,208 shares
                      66,000,000                                                       
        cost of 6,337,322 common shares in treasury
                      -90,000,000                                                       
        pension and opeb liabilities, current
                       151,000,000 151,000,000 151,000,000 151,000,000                                                   
        pension and opeb liabilities, non-current
                       3,773,000,000 3,841,000,000 3,916,000,000 4,113,000,000                                                   
        series b participating redeemable preferred stock - no par value
                                                                             
        authorized, issued and outstanding - no shares
                                                                             
        authorized - 1,200,000,000 shares (2020 - 600,000,000 shares);
                                                                             
        issued - 506,832,537 shares (2020 - 506,832,537 shares);
                                                                             
        outstanding - 500,055,941 shares
                       63,000,000                                                      
        cost of 6,776,596 common shares in treasury
                       -83,000,000                                                      
        total liabilities, redeemable preferred stock and equity
                       18,066,000,000 17,746,000,000 17,215,000,000 16,771,000,000                                                   
        authorized, issued and outstanding - 583,273 shares
                        738,000,000 738,000,000 738,000,000                                                   
        outstanding - 499,701,762 shares
                        63,000,000                                                     
        cost of 7,130,775 common shares in treasury
                        -87,000,000                                                     
        accumulated other comprehensive loss
                        -66,000,000 -120,000,000 -133,000,000 -282,000,000 -305,900,000 -317,100,000 -318,800,000 -265,600,000 -271,800,000 -275,500,000      -30,800,000 -19,400,000 -24,300,000 -21,300,000 -1,200,000 -9,000,000 -12,300,000 -18,000,000 -25,100,000  -38,200,000 -101,400,000 -20,200,000 -55,100,000 -112,900,000 -178,400,000 -239,600,000 -51,400,000 -55,600,000 -51,000,000 -89,900,000 -70,900,000       -166,600,000 -91,700,000 -122,600,000 -160,900,000 -251,300,000 -388,800,000 -394,600,000 -88,000,000   
        authorized - 600,000,000 shares (2020 - 600,000,000 shares);
                                                                             
        outstanding - 499,214,434 shares
                         63,000,000                                                    
        cost of 7,618,103 common shares in treasury
                         -93,000,000                                                    
        income tax receivable, current
                          24,000,000 9,000,000 62,600,000 61,700,000 58,600,000 58,700,000 58,700,000 117,300,000 13,300,000                                           
        state and local taxes
                          147,000,000                                                   
        authorized - 600,000,000 shares (2019 - 600,000,000 shares);
                                                                             
        issued - 506,832,537 shares (2019 - 301,886,794 shares);
                                                                             
        outstanding - 477,517,372 shares
                          63,000,000                                                   
        cost of 29,315,165 common shares in treasury
                          -354,000,000                                                   
        income tax receivable, non-current
                            4,100,000 4,100,000 62,700,000 62,700,000 62,700,000 121,300,000 235,300,000                                           
        right-of-use asset, operating lease
                           207,700,000 213,000,000 238,000,000                                                
        accrued liabilities
                           279,400,000 288,300,000 299,800,000 126,300,000                                               
        operating lease liability, non-current
                           174,100,000 191,500,000 201,200,000                                                
        intangible liabilities
                           65,900,000 72,300,000                                                 
        asset retirement obligations
                           182,000,000 181,100,000 179,200,000                                                
        issued - 428,645,866 shares (2019 - 301,886,794 shares);
                                                                             
        outstanding - 399,229,917 shares
                           53,600,000                                                  
        cost of 29,415,949 common shares in treasury
                           -354,800,000                                                  
        outstanding - 399,159,988 shares
                            53,600,000                                                 
        cost of 29,485,878 common shares in treasury
                            -355,900,000                                                 
        intangible liability
                             137,900,000                                                
        outstanding - 398,587,083 shares
                             53,600,000                                                
        cost of 30,058,783 common shares in treasury
                             -365,000,000                                                
        derivative assets
                              45,800,000 72,800,000 118,300,000 107,400,000 49,500,000 49,500,000 49,500,000 51,000,000 49,500,000 89,500,000               72,700,000 45,100,000 66,400,000 78,600,000 78,300,000 74,800,000 78,800,000 82,100,000 73,600,000 110,200,000 132,900,000 82,600,000 208,600,000 157,600,000 131,700,000 51,500,000  27,500,000 30,200,000 76,900,000 140,200,000  85,800,000 
        state and local taxes payable
                              37,900,000    30,200,000        28,300,000    35,200,000       61,700,000        59,100,000    38,900,000    35,100,000    45,500,000   28,800,000 
        environmental and mine closure obligations
                              164,900,000 179,100,000 176,700,000 174,400,000 167,700,000 167,700,000 167,700,000 196,500,000 167,700,000 205,400,000 201,900,000 198,200,000 193,900,000 220,200,000 217,400,000 214,300,000 231,200,000 211,900,000  165,600,000 305,400,000 304,700,000 300,700,000 309,700,000 299,500,000 235,800,000 240,400,000 252,800,000 226,300,000 231,400,000 227,000,000 222,000,000 210,500,000 207,500,000 189,200,000 184,900,000 194,400,000 170,200,000 167,400,000 124,300,000    12,200,000 123,600,000  8,100,000 
        authorized - 600,000,000 shares (2018 - 600,000,000 shares);
                                                                             
        issued - 301,886,794 shares (2018 - 301,886,794 shares);
                                                                             
        outstanding - 270,084,005 shares
                              37,700,000                                               
        cost of 31,802,789 common shares in treasury
                              -390,700,000                                               
        current assets
                                                                             
        finished goods inventories
                               162,200,000                                              
        work-in-process inventories
                               55,200,000                                              
        supplies and other inventories
                               110,800,000 110,800,000 97,300,000 88,800,000 88,800,000 88,800,000 93,900,000 88,800,000 92,500,000 83,600,000 80,400,000 91,400,000 84,000,000 102,000,000 102,700,000 110,400,000 118,000,000  120,400,000 202,200,000 200,000,000 204,900,000 216,000,000 257,400,000 252,900,000 270,000,000 289,100,000 259,500,000 237,000,000 228,800,000 216,900,000 175,900,000 156,900,000 136,100,000 148,100,000 131,500,000 129,000,000 129,500,000 102,700,000 102,900,000 94,200,000 94,100,000 101,200,000 86,700,000  75,200,000 
        other assets
                                                  242,700,000 433,800,000                          
        deposits for property, plant and equipment
                               41,600,000 52,200,000 68,300,000 17,800,000 17,800,000 17,800,000 17,800,000 17,800,000                                       
        total other assets
                               656,700,000 676,500,000 770,000,000 375,000,000 375,000,000 375,000,000 357,800,000 375,000,000     83,200,000 78,700,000 84,700,000 93,800,000 143,000,000  131,000,000   444,500,000 408,500,000 542,300,000 739,400,000 761,700,000 717,600,000 2,600,700,000 2,569,600,000 2,539,300,000 2,226,400,000 2,205,200,000 2,181,000,000 1,216,900,000 1,215,300,000 1,158,300,000 1,020,500,000 991,500,000 885,500,000 938,600,000 861,800,000 850,900,000 793,300,000 578,100,000  465,400,000 
        liabilities
                                                                             
        current liabilities
                                                                             
        accrued interest
                               34,100,000 31,300,000 23,000,000 31,400,000 31,400,000 31,400,000 31,400,000 31,400,000 21,700,000 30,700,000 19,700,000 40,200,000                                   
        derivative liabilities
                               32,600,000        9,300,000               36,100,000 88,600,000               29,800,000 71,100,000 142,700,000 194,300,000 38,400,000   
        partnership distribution payable
                                44,100,000 43,800,000 44,200,000 44,200,000 44,200,000 44,200,000 44,200,000                                       
        pension and postemployment benefit liabilities
                               233,200,000 239,300,000 244,200,000 257,700,000 257,700,000 257,700,000 257,700,000 257,700,000 254,300,000 276,100,000 279,100,000  198,500,000 206,400,000 213,800,000  209,100,000  250,200,000 230,000,000 276,600,000 285,000,000  556,100,000 586,900,000 600,000,000                     
        other liabilities
                               151,400,000 149,700,000 145,000,000 163,500,000 163,500,000 163,500,000 186,900,000 163,500,000 189,800,000 193,700,000 199,200,000 213,800,000 235,300,000 240,300,000 216,000,000 213,800,000 218,500,000  216,300,000 296,300,000 326,900,000 347,900,000 379,300,000 395,900,000 412,300,000 473,700,000 492,600,000 318,600,000 330,600,000 371,300,000 338,000,000 273,600,000 328,300,000 248,100,000 256,700,000 204,300,000 190,400,000 207,900,000 212,700,000 431,100,000 355,400,000 357,000,000 149,100,000 153,300,000  116,400,000 
        equity
                                                                             
        shareholders' equity
                                                                             
        preferred stock - no par value
                                                                             
        class a - 3,000,000 shares authorized
                                                                             
        class b - 4,000,000 shares authorized
                                                                             
        outstanding - 270,075,445 shares
                               37,700,000                                              
        cost of 31,811,349 common shares in treasury
                               -390,900,000                                              
        outstanding - 270,042,018 shares
                                37,700,000                                             
        cost of 31,844,776 common shares in treasury
                                -391,300,000                                             
        outstanding - 282,839,140 shares
                                 37,700,000                                            
        cost of 19,047,654 common shares in treasury
                                 -263,900,000                                            
        loans to and accounts receivables from the canadian entities
                                  51,600,000        48,600,000    72,900,000                               
        current assets of discontinued operations
                                  118,500,000 118,500,000 118,500,000  118,500,000                                       
        non-current assets of discontinued operations
                                  20,300,000 20,300,000                                          
        contingent claims
                                  55,600,000 55,600,000 55,600,000 55,600,000 55,600,000 50,000,000 50,000,000                                     
        current liabilities of discontinued operations
                                  75,000,000 75,000,000 75,000,000  75,000,000                                       
        non-current liabilities of discontinued operations
                                  52,200,000 52,200,000 52,200,000  52,200,000                                       
        cliffs shareholders' equity
                                  -410,300,000                                           
        income tax receivable
                                   13,300,000 235,300,000 235,300,000 235,300,000        5,700,000 3,100,000  165,500,000 25,400,000 35,400,000                          
        loans to and accounts receivable from the canadian entities
                                   51,600,000 51,600,000 51,600,000 51,600,000 51,900,000 50,100,000 49,000,000  69,300,000 70,200,000 69,900,000                                
        cliffs shareholders' deficit
                                   -410,300,000 -410,300,000 -410,300,000 -410,300,000                                       
        total deficit
                                   -410,100,000 -410,100,000 -410,100,000 -410,100,000 -833,100,000 -666,700,000 -703,000,000 -1,330,500,000 -1,400,500,000 -1,678,900,000 -1,696,700,000 -1,811,600,000 -1,759,500,000  -1,782,100,000                            
        total liabilities and deficit
                                   2,990,200,000 2,990,200,000 2,990,200,000 2,990,200,000 1,923,300,000 2,030,100,000 1,925,700,000 1,923,900,000 1,772,900,000 1,851,000,000 1,886,300,000 2,135,500,000 2,271,500,000  2,702,600,000                            
        long-term assets of discontinued operations
                                    20,300,000  20,300,000                                       
        authorized - 600,000,000 shares (2016 - 400,000,000 shares);
                                                                             
        issued - 301,886,794 shares (2016 - 238,636,794 shares);
                                                                             
        outstanding - 296,503,284 shares
                                       37,700,000                                      
        cost of 5,383,510 common shares in treasury
                                       -236,200,000                                      
        total cliffs shareholders' deficit
                                       -833,300,000 -789,100,000 -830,100,000 -1,464,300,000 -1,544,300,000 -1,830,700,000 -1,859,400,000 -1,981,400,000 -1,932,000,000  -1,995,700,000                            
        outstanding - 296,496,321 shares
                                        37,700,000                                     
        cost of 5,390,473 common shares in treasury
                                        -236,500,000                                     
        authorized - 400,000,000 shares (2016 - 400,000,000 shares);
                                                                             
        outstanding - 296,398,149 shares
                                         37,700,000                                    
        cost of 5,488,645 common shares in treasury
                                         -241,200,000                                    
        insurance coverage receivable
                                            800,000 84,800,000 93,500,000                               
        accrued royalties
                                          26,200,000    17,300,000       57,300,000    48,100,000    77,100,000                
        guarantees
                                          200,000 200,000 200,000 23,600,000 96,500,000                               
        insured loss
                                            800,000 84,800,000 93,500,000                               
        postemployment benefit liabilities
                                                          603,300,000 634,200,000 635,600,000  462,400,000 490,900,000 494,000,000  477,100,000 498,000,000 499,000,000  424,800,000 436,600,000 435,600,000     
        pensions
                                          245,700,000    209,700,000       197,500,000    403,800,000    394,700,000    284,900,000    267,300,000    250,100,000   88,600,000 
        other postretirement benefits
                                          34,800,000    11,300,000       96,500,000    214,500,000    271,100,000    243,100,000    178,500,000    17,900,000   11,200,000 
        total postemployment benefit liabilities
                                          280,500,000    221,000,000       294,000,000    618,300,000    665,800,000    528,000,000    445,800,000    448,000,000    
        7% series a mandatory convertible, class a, no par value and 1,000 per share liquidation preference
                                                                             
        issued and outstanding - none issued
                                                                             
        authorized - 400,000,000 shares (2015 - 400,000,000 shares);
                                                                             
        issued - 238,636,794 shares (2015 - 159,546,224 shares);
                                                                             
        outstanding - 233,074,091 shares
                                          29,800,000                                   
        cost of 5,562,703 common shares in treasury
                                          -245,500,000                                   
        short-term assets of discontinued operations
                                             500,000 14,900,000 141,400,000  197,200,000                            
        short-term liabilities of discontinued operations
                                           5,500,000 4,400,000 4,300,000 6,900,000 182,200,000  265,000,000                            
        issued and outstanding - no shares
                                                                             
        issued - 236,346,794 shares (2015 - 159,546,224 shares);
                                                                             
        outstanding - 230,594,581 shares
                                           29,500,000                                  
        cost of 5,752,213 common shares in treasury
                                           -255,200,000                                  
        issued - 189,622,349 shares (2015 - 159,546,224 shares);
                                                                             
        outstanding - 183,864,626 shares
                                            23,700,000                                 
        cost of 5,757,723 common shares in treasury
                                            -255,500,000                                 
        issued - 187,822,349 shares (2015 - 159,546,224 shares);
                                                                             
        outstanding - 181,909,771 shares
                                             23,500,000                                
        cost of 5,912,578 common shares in treasury
                                             -262,700,000                                
        long-term liabilities of discontinued operations
                                                 125,200,000                            
        issued and outstanding - 731,223 shares
                                              731,300,000 731,300,000  731,300,000 731,300,000 731,300,000                          
        authorized - 400,000,000 shares (2014 - 400,000,000 shares);
                                                                             
        issued - 159,546,224 shares (2014 - 159,546,224 shares);
                                                                             
        outstanding - 153,591,930 shares
                                              19,800,000                               
        cost of 5,954,294 common shares in treasury
                                              -265,000,000                               
        outstanding - 153,404,664 shares
                                               19,800,000                              
        cost of 6,141,560 common shares in treasury
                                               -277,500,000                              
        description
                                                                             
        assets:
                                                                             
        cash equivalents
                                                130,000,000                             
        available-for-sale marketable securities
                                                100,000                             
        total
                                                130,100,000                             
        liabilities:
                                                                             
        foreign exchange contracts
                                                                             
        outstanding - 153,279,552 shares
                                                 19,800,000                            
        cost of 6,266,672 common shares in treasury
                                                 -283,500,000                            
        short-term debt and current portion of long-term debt
                                                  234,700,000                           
        authorized - 400,000,000 shares (2013 - 400,000,000 shares);
                                                                             
        issued - 159,546,224 shares (2013 - 159,546,224 shares);
                                                                             
        outstanding - 153,162,348 shares
                                                  19,800,000                           
        cost of 6,383,876 common shares in treasury
                                                  -291,600,000                           
        short-term and current portion of long-term debt
                                                   161,100,000 96,900,000                         
        outstanding - 153,182,592 shares
                                                   19,800,000                          
        cost of 6,363,632 common shares in treasury
                                                   -297,300,000                          
        issued and outstanding - 731,233 shares
                                                    731,300,000                         
        outstanding - 153,181,056 shares
                                                    19,800,000                         
        cost of 6,365,168 common shares in treasury
                                                    -298,500,000                         
        deferred and refundable income taxes
                                                     110,700,000    105,400,000             83,400,000       
        income taxes payable
                                                     61,700,000 57,300,000 107,100,000 81,500,000 28,300,000    265,400,000    103,400,000    6,100,000    99,300,000 49,500,000  20,000,000 
        current portion of debt
                                                     20,900,000 7,900,000   94,100,000 369,700,000 369,700,000                  
        issued and outstanding - 731,250 shares
                                                     731,300,000 731,300,000 731,300,000 731,300,000                     
        authorized - 400,000,000 shares (2012 - 400,000,000 shares);
                                                                             
        issued - 159,546,224 shares (2012 - 149,195,469 shares);
                                                                             
        outstanding - 153,126,291 shares
                                                     19,800,000                        
        cost of 6,419,933 common shares in treasury
                                                     -305,500,000                        
        investments in ventures
                                                      71,500,000 68,700,000 131,800,000 135,800,000 517,000,000 531,200,000 530,900,000 526,600,000 515,800,000 509,400,000 525,400,000 514,800,000 525,300,000 505,700,000 395,300,000 315,100,000 318,500,000 308,400,000 317,400,000 305,300,000 264,200,000  265,900,000 
        deferred revenue
                                                      15,100,000 20,800,000 22,900,000 35,900,000 125,100,000 123,400,000 108,600,000 126,600,000 99,600,000 141,200,000 238,500,000 215,600,000 75,700,000 100,200,000 165,200,000 105,100,000  71,900,000 129,300,000 86,800,000 181,300,000  14,800,000 
        issued - 159,545,469 shares (2012 - 149,195,469 shares);
                                                                             
        outstanding - 153,124,449 shares
                                                      19,800,000                       
        cost of 6,421,264 common shares in treasury
                                                      -306,100,000                       
        outstanding - 153,121,032 shares
                                                       19,800,000                      
        cost of 6,424,437 common shares in treasury
                                                       -306,500,000                      
        outstanding - 153,095,702 shares
                                                        19,800,000                     
        cost of 6,449,767 common shares in treasury
                                                        -307,700,000                     
        assets held for sale
                                                          156,600,000                   
        liabilities held for sale
                                                          29,700,000                   
        class a - 3,000,000 shares authorized and unissued
                                                                             
        class b - 4,000,000 shares authorized and unissued
                                                                             
        authorized - 400,000,000 shares (2011 - 400,000,000 shares);
                                                                             
        issued - 149,195,469 shares (2011 - 149,195,469 shares);
                                                                             
        outstanding - 142,495,902 shares
                                                         18,500,000                    
        cost of 6,699,567 common shares in treasury
                                                         -322,600,000                    
        taxes payable
                                                          84,700,000 49,200,000 238,000,000  221,800,000 140,300,000 213,000,000  42,100,000 68,000,000 67,800,000  40,800,000 64,800,000 131,200,000     
        below-market sales contracts
                                                          83,800,000 98,500,000 113,200,000 111,800,000 128,400,000 145,100,000 161,700,000 164,400,000 185,700,000 196,300,000 208,100,000 153,300,000 163,400,000 173,500,000 183,600,000 183,600,000 221,300,000   
        authorized - 400,000,000 shares (2011 - 400,000,000);
                                                                             
        outstanding - 142,491,645 shares
                                                          18,500,000                   
        cost of 6,703,824 common shares in treasury
                                                          -322,600,000                   
        outstanding - 142,488,633 shares
                                                           18,500,000                  
        cost of 6,706,836 common shares in treasury
                                                           -322,600,000                  
        deferred and refundable taxes
                                                            21,800,000 21,900,000 4,200,000 38,000,000 36,700,000 43,200,000 101,100,000 98,400,000 81,200,000 61,400,000    54,800,000   24,400,000 
        current portion of term loan
                                                            87,200,000 74,800,000 62,300,000 62,500,000              
        cliffs shareholders’ equity
                                                                             
        outstanding - 142,487,477 shares
                                                            18,500,000                 
        cost of 6,707,992 common shares in treasury
                                                            -323,000,000                 
        total cliffs shareholders’ equity
                                                            6,140,000,000 5,785,000,000 5,723,400,000 5,546,200,000 4,273,000,000 3,845,900,000 3,436,900,000 2,999,800,000 2,830,300,000 2,542,800,000 2,405,700,000 2,265,100,000 1,737,600,000     
        below-market sales contracts — current
                                                             52,700,000    57,100,000    30,300,000    30,300,000    
        preferred stock — no par value
                                                                             
        class a — 3,000,000 shares authorized and unissued
                                                                             
        class b — 4,000,000 shares authorized and unissued
                                                                             
        common shares — par value 0.125 per share
                                                                             
        authorized — 400,000,000 shares (2010 — 224,000,000);
                                                                             
        issued — 149,195,469 shares (2010 — 138,845,469 shares);
                                                                             
        outstanding — 142,021,718 shares
                                                             18,500,000                
        cost of 7,173,751 common shares in treasury
                                                             -336,000,000                
        accounts receivable from associated companies
                                                              69,000,000 70,500,000              
        authorized - 400,000,000 shares (2010 - 224,000,000 shares);
                                                                             
        issued - 149,195,469 shares (2010 - 138,845,469 shares);
                                                                             
        outstanding - 143,009,708 shares
                                                              18,600,000               
        cost of 6,185,761 common shares in treasury
                                                              -268,200,000               
        outstanding - 146,010,183 shares
                                                               18,600,000              
        cost of 3,185,286 common shares in treasury
                                                               -46,300,000              
        authorized - 224,000,000 shares;
                                                                             
        issued - 138,845,469 shares (2010 - 138,845,469 shares);
                                                                             
        outstanding - 135,644,830 shares
                                                                17,300,000             
        cost of 3,200,639 common shares in treasury
                                                                -46,400,000             
        marketable securities
                                                                 85,900,000    88,100,000    25,400,000 62,800,000  54,300,000 
        long-term receivables
                                                                 56,100,000    49,800,000    33,400,000   36,400,000 
        deposits and miscellaneous
                                                                 45,900,000    92,000,000    68,400,000   62,900,000 
        senior notes
                                                                 1,713,100,000    325,000,000   325,000,000 325,000,000 325,000,000   
        term loan
                                                                     200,000,000   200,000,000 200,000,000 200,000,000  200,000,000 
        authorized — 224,000,000 shares;
                                                                             
        issued — 138,845,469 shares (2009 — 134,623,528 shares);
                                                                             
        outstanding — 135,456,999 shares
                                                                 17,300,000            
        cost of 3,388,470 common shares in treasury
                                                                 -37,700,000            
        issued - 138,845,469 shares (2009 - 134,623,528 shares);
                                                                             
        outstanding - 135,436,999 shares
                                                                  17,300,000           
        cost of 3,408,470 common shares in treasury
                                                                  -18,600,000           
        outstanding - 135,441,226 shares
                                                                   17,300,000          
        cost of 3,404,243 common shares in treasury
                                                                   -18,600,000          
        outstanding - 135,431,974 shares
                                                                    17,400,000         
        cost of 3,413,495 common shares in treasury
                                                                    -18,700,000         
        3.25% redeemable cumulative convertible perpetual preferred stock — issued 172,500 shares, 205 shares outstanding in 2008
                                                                             
        issued — 134,623,528 shares (2008 — 134,623,528 shares);
                                                                             
        outstanding — 130,971,470 shares
                                                                     16,800,000        
        cost of 3,652,058 common shares in treasury
                                                                     -19,900,000        
        3.25% redeemable cumulative convertible perpetual preferred stock - issued 172,500 shares 205 shares outstanding in 2008
                                                                             
        issued - 134,623,528 shares (2008 - 134,623,528 shares);
                                                                             
        outstanding - 130,975,041 shares
                                                                      16,800,000       
        cost of 3,648,487 common shares in treasury
                                                                      -19,900,000       
        3.25% redeemable cumulative convertible perpetual
                                                                             
        preferred stock - issued 172,500 shares
                                                                             
        205 shares outstanding in 2008
                                                                             
        issued - 134,623,925 shares (2008 - 134,623,528 shares);
                                                                             
        outstanding - 130,994,855 shares
                                                                       16,800,000      
        cost of 3,629,070 common shares in treasury
                                                                       -19,800,000      
        issued - 134,623,528 shares; outstanding - 113,721,069 shares
                                                                        16,800,000     
        cost of 20,902,459 common shares in treasury
                                                                        -112,800,000     
        other
                                                                         115,900,000 132,000,000  107,100,000 
        prepaid pensions — salaried
                                                                             
        liabilities and shareholders’ equity
                                                                             
        revolving credit facility
                                                                            400,000,000 
        contingent consideration
                                                                            99,200,000 
        deferred payment
                                                                            97,600,000 
        minority interest
                                                                         3,300,000 69,200,000  133,000,000 
        3.25% redeemable cumulative convertible perpetual preferred stock — issued 172,500 shares 205 and 134,715 outstanding in 2008 and 2007
                                                                         200,000    
        shareholders’ equity
                                                                             
        issued — 134,623,528 shares; outstanding — 113,508,990 shares
                                                                         16,800,000    
        cost of 21,114,538 common shares in treasury
                                                                         -113,800,000    
        total shareholders’ equity
                                                                         1,750,500,000 1,688,300,000  1,246,600,000 
        total liabilities and shareholders’ equity
                                                                         4,111,100,000 4,309,200,000  3,301,000,000 
        property, plant and equipment less accumulated depreciation and depletion - 429.9
                                                                          2,518,900,000   
        long term receivables
                                                                          33,100,000   
        amounts due to former owners of pinnoak
                                                                          279,100,000   
        unregistered common shares issued
                                                                          165,000,000   
        pensions and other postretirement benefits
                                                                          186,100,000   
        revolving credit
                                                                             
        3.25% redeemable cumulative convertible perpetual preferred stock - issued 172,500 shares outstanding 205 and 134,715 in 2008 and 2007
                                                                          200,000   
        common shares - par value 0.125 a share authorized - 224,000,000 shares; issued - 134,623,528 shares outstanding - 106,720,611 shares
                                                                          16,800,000   
        cost of 27,902,917 common shares in treasury
                                                                          -158,600,000   
        beginning balance
                                                                           63,900,000  
        total gains
                                                                             
        included in earnings
                                                                           244,900,000  
        included in other comprehensive income
                                                                             
        settlements
                                                                           -183,000,000  
        transfers in and/or out of level 3
                                                                             
        ending balance - june 30, 2008
                                                                           125,800,000  
        total gains for the period included in earnings attributable to the change in unrealized gains or losses on assets still held at june 30, 2008
                                                                           84,300,000  
        trade accounts receivable
                                                                            92,500,000 
        net properties
                                                                            1,874,300,000 
        prepaid pensions
                                                                            5,500,000 
        3.25% redeemable cumulative convertible perpetual preferred stock - issued 172,500 shares outstanding 110,705 and 134,715 in 2008 and 2007
                                                                            110,700,000 
        common shares - par value 0.25 a share authorized - 112,000,000 shares; issued - 67,311,764 shares
                                                                            16,800,000 
        cost of 22,065,203 common shares in treasury
                                                                            -237,700,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2018-02-01 2017-09-30 2016-12-31 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-09-30 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 
                                                                        
          ifrs
                                                                        
          inr
                                                                        
          irs
                                                                        
          ispat
                                                                        
          jorc
                                                                        
          libor
                                                                        
          lifo
                                                                        
          ltvsmc
                                                                        
          mdeq
                                                                        
          mmbtu
                                                                        
          mp
                                                                        
          mpca
                                                                        
          mpi
                                                                        
          mpsc
                                                                        
          mrrt
                                                                        
          msha
                                                                        
          naaqs
                                                                        
          nbcwa
                                                                        
          ndep
                                                                        
          no2
                                                                        
          nox
                                                                        
          northshore
                                                                        
          npdes
                                                                        
          nrd
                                                                        
          nyse
                                                                        
          oak grove
                                                                        
          oci
                                                                        
          opeb
                                                                        
          opip
                                                                        
          pbo
                                                                        
          pinnacle
                                                                        
          pinnoak
                                                                        
          pluton resources
                                                                        
          pm10
                                                                        
          portman
                                                                        
          ppaca
                                                                        
          prp
                                                                        
          qcoal
                                                                        
          reconciliation act
                                                                        
          renewafuel
                                                                        
          ring of fire properties
                                                                        
          rtwg
                                                                        
          sars
                                                                        
          abbreviation or acronym
                                                                        
          sec
                                                                        
          severstal
                                                                        
          silver bay power
                                                                        
          sip
                                                                        
          smcra
                                                                        
          smm
                                                                        
          so2
                                                                        
          sonoma
                                                                        
          spider
                                                                        
          tcr
                                                                        
          tilden
                                                                        
          tmdl
                                                                        
          tsr
                                                                        
          umwa
                                                                        
          united taconite
                                                                        
          up 1994
                                                                        
          u.s.
                                                                        
          u.s. steel
                                                                        
          usw
                                                                        
          vale
                                                                        
          veba
                                                                        
          vie
                                                                        
          vnqdc plan
                                                                        
          wabush
                                                                        
          weirton
                                                                        
          wepco
                                                                        
          wheeling
                                                                        
          wisco
                                                                        
          all cliffs’ managed mines
                                                                        
          other u.s. mines
                                                                        
          u.s. steel’s minnesota ore operations
                                                                        
          minnesota taconite
                                                                        
          keewatin taconite
                                                                        
          total u.s. steel
                                                                        
          arcelormittal usa minorca mine
                                                                        
          total other u.s. mines
                                                                        
          other canadian mines
                                                                        
          iron ore company of canada
                                                                        
          arcelormittal mines canada
                                                                        
          total other canadian mines
                                                                        
          total u.s. and canadian mines
                                                                        
          customer
                                                                        
          arcelormittal
                                                                        
          algoma
                                                                        
          total
                                                                        
          excluding freight and venture partners’ cost reimbursements.
                                                                        
          includes subsidiaries of each customer.
                                                                        
          facility
                                                                        
          cleveland works and indiana harbor west facilities
                                                                        
          indiana harbor east facility
                                                                        
          weirton facility
                                                                        
          salaried
                                                                        
          hourly
                                                                        
          includes our employees and the employees of the u.s. iron ore joint ventures.
                                                                        
          includes the employees in our latin american iron ore, asia pacific coal and ferroalloys operating segments, with the exception of contracted mining employees.
                                                                        
          excludes contracted mining employees.
                                                                        
          name
                                                                        
          joseph a. carrabba
                                                                        
          laurie brlas
                                                                        
          donald j. gallagher
                                                                        
          duncan p. price
                                                                        
          p. kelly tompkins
                                                                        
          clifford smith
                                                                        
          william a. brake, jr.
                                                                        
          david b. blake
                                                                        
          william c. boor
                                                                        
          terrence r. mee
                                                                        
          james michaud
                                                                        
          terrance m. paradie
                                                                        
          steven m. raguz
                                                                        
          duke d. vetor
                                                                        
          david webb
                                                                        
          •
                                                                        
          item
                                                                        
          mine
                                                                        
          empire
                                                                        
          hibbing taconite
                                                                        
          net of accumulated amortization and depreciation. hibbing taconite is reflected at our 23 percent ownership interest.
                                                                        
          tons are long tons of 2,240 pounds.
                                                                        
          bloom lake
                                                                        
          net of accumulated amortization and depreciation.
                                                                        
          tons are metric tons of 2,205 pounds.
                                                                        
          koolyanobbing
                                                                        
          cockatoo island
                                                                        
          net of accumulated amortization and depreciation. cockatoo island is reflected at our 50 percent ownership interest.
                                                                        
          amapá
                                                                        
          net of accumulated amortization and depreciation. amapá is reflected at our 30 percent ownership interest.
                                                                        
          pinnacle complex
                                                                        
          cliffs logan county coal
                                                                        
          tons are short tons of 2,000 pounds.
                                                                        
          iron ore:
                                                                        
          u.s. iron ore
                                                                        
          eastern canadian iron ore
                                                                        
          asia pacific iron ore
                                                                        
          coal:
                                                                        
          north american coal
                                                                        
          clcc
                                                                        
          pricing for our u.s. iron ore mines and wabush reflects us per long tons of pellets f.o.b. port, except for empire and tilden, which are f.o.b. mine. pricing for our asia pacific iron ore mines and bloom lake reflects us per metric ton of product. pricing for our north american coal mines reflects us per short ton.
                                                                        
          totals
                                                                        
          estimated standard equivalent pellets, including both proven and probable reserves based on life-of-mine operating schedules.
                                                                        
          long tons equal 2,240 pounds.
                                                                        
          reserves listed on 100 percent basis. cliffs has a 79 percent interest in empire.
                                                                        
          reserves listed on 100 percent basis. cliffs has a 85 percent interest in tilden.
                                                                        
          reserves listed on 100 percent basis. cliffs has a 23 percent interest in hibbing taconite.
                                                                        
          estimated standard equivalent pellets or concentrate, including both proven and probable reserves based on life-of-mine operating schedules.
                                                                        
          metric tons equal 2,205 pounds.
                                                                        
          prior year reserves for wabush were reported in long tons. long ton equals 2,240 pounds.
                                                                        
          reported ore reserves restricted to proven and probable tonnages based on life of mine operating schedules. 0.51 million metric tons of the koolyanobbing reserves are sourced from current stockpiles.
                                                                        
          metric tons of 2,205 pounds.
                                                                        
          reserves listed on 100 percent basis. cliffs has a 50 percent interest in the cockatoo island joint venture.
                                                                        
          the mineral rights for these mines are 100% leased.
                                                                        
          pocahontas no 3
                                                                        
          pocahontas no 4
                                                                        
          blue creek seam
                                                                        
          multi-seam underground
                                                                        
          multi-seam surface
                                                                        
          all coal extracted by underground mining using longwall and continuous miner equipment except for clcc surface, which is mined by contour and highwall mining methods.
                                                                        
          short tons of 2,000 pounds.
                                                                        
          assigned reserves represent coal reserves that can be mined without a significant capital expenditure for mine development, whereas unassigned reserves will require significant capital expenditures to mine the reserves.
                                                                        
          clcc thermal reserves do not meet u.s. compliance standards as defined by phase ii of the clean air act as coal having a sulfur dioxide content of 1.2 pounds or less per million btu.
                                                                        
          the mineral rights for these mines are 100 percent leased.
                                                                        
          mine ,
                                                                        
          moranbah coal b,c, and e seams
                                                                        
          metric tons of 2,205 pounds. recoverable clean coal at 9 percent moisture. reserves listed on 100 percent basis. cliffs has a 45 percent interest in the sonoma joint venture.
                                                                        
          all coal extracted by conventional surface mining techniques.
                                                                        
          item 5.
                                                                        
          first quarter
                                                                        
          second quarter
                                                                        
          third quarter
                                                                        
          fourth quarter
                                                                        
          year
                                                                        
          cliffs natural resources inc.
                                                                        
          s&p 500 index - total returns
                                                                        
          s&p 500 steel index
                                                                        
          s&p midcap 400 index
                                                                        
          period
                                                                        
          october 1 — 31, 2011
                                                                        
          november 1 — 30, 2011
                                                                        
          december 1 — 31, 2011
                                                                        
          item 6.
                                                                        
          financial data
                                                                        
          revenue from product sales and services
                                                                        
          cost of goods sold and operating expenses
                                    -50,400,000 -187,200,000 -242,600,000                                  
          other operating expense
                                                                        
          operating income
                                -105,200,000 227,600,000 -800,000  -28,700,000 294,200,000 -40,000,000                                  
          income from continuing operations
                                -69,600,000    -29,600,000                                    
          income from discontinued operations
                                                                        
          net income
        -235,000,000 -240,000,000 -470,000,000 -483,000,000 -434,000,000 -230,000,000 9,000,000 -53,000,000 -139,000,000 275,000,000 356,000,000 -42,000,000 -204,000,000 165,000,000 601,000,000 814,000,000 1,282,000,000 795,000,000 57,000,000 73,800,000 1,900,000   201,900,000 -69,900,000   690,300,000 272,700,000    52,900,000 227,100,000 116,800,000 -57,900,000 6,000,000 65,200,000 -761,700,000 -6,887,200,000 -14,200,000 113,900,000 141,300,000 120,800,000 -1,870,800,000 78,500,000 274,300,000 391,400,000 221,900,000 741,400,000 426,000,000 423,300,000 393,200,000 272,400,000 260,600,000 93,500,000 108,100,000 58,600,000 45,200,000 -7,600,000 53,900,000 174,700,000 270,500,000 16,700,000 
          less: net income attributable to noncontrolling interest
                                                                        
          net income attributable to cliffs shareholders
                                    272,700,000                                    
          preferred stock dividends
                                           -12,800,000 -12,800,000 -12,800,000 -12,800,000 -12,800,000 -12,700,000 -13,000,000                   1,100,000 -900,000 -200,000 -1,100,000 
          income attributable to cliffs common shareholders
                                                                        
          earnings per common share attributable to cliffs shareholders — basic
                                                                        
          continuing operations
                                -250,000 670,000 -80,000  -100,000 1,060,000 -290,000                                  
          discontinued operations
                                    1,020,000                                    
          earnings per common share attributable to cliffs shareholders — diluted
                                                                        
          total assets
                                                                        
          long-term obligations
                                                                        
          net cash from operating activities
            -472,000,000 -84,000,000   652,000,000 767,000,000    536,000,000          174,400,000    289,800,000             460,000,000    239,000,000    743,100,000 820,700,000 618,100,000 106,900,000         271,000,000    
          redeemable cumulative convertible perpetual preferred stock
                                                                        
          distributions to preferred shareholders cash dividends
                                                                        
          distributions to common shareholders cash dividends
                                                                        
          - per share
                                                                        
          - total
                                                                        
          repurchases of common shares
                                                                        
          iron ore and coal production and sales statistics
                                                                        
          production tonnage - u.s. iron ore
                                                                        
          - eastern canadian iron ore
                                                                        
          - north american coal
                                                                        
          - asia pacific iron ore
                                                                        
          production tonnage —
                                                                        
          - u.s. iron ore
                                                                        
          sales tonnage - u.s. iron ore
                                                                        
          common shares outstanding — basic
                                                                        
          - average for year
                                                                        
          - at year-end
                                                                        
          item 7.
                                                                        
          revenues from product sales and services
                                                                        
          sales margin
                                -108,100,000 232,100,000 30,900,000  -22,900,000 288,100,000 -3,600,000                                  
          sales margin %
                                                                        
          selling, general and administrative expenses
                                5,100,000 -2,500,000 -28,100,000  -3,900,000 1,500,000 -27,700,000                                  
          exploration costs
                                                                        
          impairment of goodwill
                                                                        
          consolidated thompson acquisition costs
                                                                        
          miscellaneous — net
                                                                        
          gain on acquisition of controlling interest
                                                                        
          changes in fair value of foreign currency contracts
                                                                        
          interest income
                                                                        
          interest expense
                                800,000 -1,000,000 -25,100,000  1,700,000 2,300,000 -33,500,000                                  
          other non-operating income
                                -300,000 500,000 100,000  -100,000 4,400,000                                  
          contract maturity
                                                                        
          contract portfolio :
                                                                        
          contracts expiring in the next 12 months
                                                                        
          total hedge contract portfolio
                                                                        
          includes collar options.
                                                                        
          income tax expense
                                                                        
          effective tax rate
                                                                        
          u.s. statutory rate
                                                                        
          increases/(decreases) due to:
                                                                        
          non-taxable income related to noncontrolling interests
                                                                        
          percentage depletion
                                                                        
          impact of foreign operations
                                                                        
          income not subject to tax
                                                                        
          non-taxable hedging income
                                                                        
          state taxes
                                                                        
          manufacturer’s deduction
                                                                        
          valuation allowance
                                                                        
          tax uncertainties
                                                                        
          other items — net
                                                                        
          effective income tax rate before discrete items
                                                                        
          discrete items
                                                                        
          effective income tax rate
                                                                        
          contract portfolio (excluding aud call options) :
                                                                        
          contracts expiring in the next 13 to 24 months
                                                                        
          aud call options
                                                                        
          includes collar options and forward contracts.
                                                                        
          aud call options are excluded from the weighted-average exchange rate used for the remainder of the contract portfolio due to the unlimited downside participation associated with these instruments.
                                                                        
          sales tons
                                                                        
          production tons :
                                                                        
          cliffs’ share of total
                                                                        
          long tons of pellets (2,240 pounds).
                                                                        
          sales metric tons
                                                                        
          production metric tons
                                                                        
          metric tons (2,205 pounds).
                                                                        
          production tons
                                                                        
          tons are short tons (2,000 pounds).
                                                                        
          metric tons (2,205 pounds). cockatoo island production and sales reflects our 50 percent share.
                                                                        
          metric tons (2,205 pounds). cockatoo island production reflects our 50 percent share.
                                                                        
          cash and cash equivalents — january 1
                                                                        
          significant investing transactions
                                                                        
          net settlements on canadian dollar foreign exchange contracts
                                                                        
          investment in consolidated thompson senior secured notes
                                                                       
          acquisition of consolidated thompson, net of cash acquired
                                                        -100,000               
          acquisition of wabush
                                                                        
          acquisition of freewest
                                                                        
          acquisition of spider
                                                                        
          acquisition of clcc
                                                                        
          capital expenditures
            -205,000,000 -151,000,000   -165,000,000 -162,000,000    -248,000,000          -191,100,000    -97,200,000             -119,400,000    -333,900,000    -401,800,000 -234,400,000 -178,800,000 -65,700,000         -34,800,000    
          free cash flows
            -677,000,000 -235,000,000   487,000,000 605,000,000    288,000,000          -16,700,000    192,600,000             340,600,000    -94,900,000    341,300,000 586,300,000 439,300,000 41,200,000         236,200,000    
          sources (uses) of financing
                                                                        
          net proceeds from issuance of common shares
                                        -200,000       -300,000 285,600,000           -200,000       
          net proceeds from issuance of senior notes
                                                        298,800,000 699,300,000 100,000 992,900,000 395,100,000         
          borrowing on term loan
                                                                        
          repayment of consolidated thompson convertible debentures
                                                                      
          payments under share buyback program
                                                        -67,900,000                
          common stock dividends
                                               -23,500,000 -23,100,000 -22,800,000 -23,100,000 -22,900,000 -89,400,000 -89,000,000 -89,100,000 -39,700,000 -40,100,000 -40,800,000 -19,000,000 -19,000,000 -19,000,000 -19,100,000 -19,000,000 -11,800,000 -11,500,000 -5,200,000 -5,300,000 -9,900,000 -10,000,000 -9,200,000 -9,000,000 -7,900,000 
          other net activity
                                                                        
          cash and cash equivalents — december 31
                                                                        
          contractual obligations
                                                                        
          long-term debt
                                                                        
          interest on debt
                                                                        
          operating lease obligations
                                                                        
          capital lease obligations
                                                                        
          purchase obligations:
                                                                        
          asia pacific rail upgrade
                                                                        
          oak grove portal project
                                                                        
          michigan expansion project
                                                                        
          koolyanobbing expansion project
                                                                        
          bloom lake expansion project
                                                                        
          oak grove repair project
                                                                        
          lower war eagle development project
                                                                        
          open purchase orders
                                                                        
          minimum “take or pay” purchase commitments
                                                                        
          total purchase obligations
                                                                        
          other long-term liabilities:
                                                                        
          pension funding minimums
                                                                        
          opeb claim payments
                                                                        
          deferred revenue
                                                                        
          environmental and mine closure obligations
                                                                  900,000 500,000     
          unrecognized tax benefits
                                                                        
          personal injury
                                                                        
          other
        -39,000,000 63,000,000 -2,000,000 65,000,000 419,000,000 19,000,000 3,000,000 44,000,000 -45,000,000 47,000,000 35,000,000 39,000,000 47,000,000 20,000,000 -27,000,000 82,000,000 55,000,000 26,000,000 -2,000,000 24,000,000 15,000,000   16,000,000 2,800,000 36,800,000 9,800,000 15,000,000 -6,900,000 -13,300,000 25,900,000  27,300,000 23,600,000 18,500,000 60,400,000 -1,600,000 22,700,000 31,600,000 -47,400,000 11,400,000 11,300,000 -34,800,000 5,200,000 -27,300,000 30,400,000 -35,000,000 -5,700,000 -3,800,000 -6,500,000 32,700,000 -22,500,000 -18,600,000 19,400,000 13,200,000 -5,100,000 -10,100,000 13,400,000 1,600,000 -300,000 21,900,000 6,300,000 -1,400,000 200,000 
          total other long-term liabilities
                                                                        
          includes our consolidated obligations.
                                                                        
          includes minimum electric power demand charges, minimum coal, diesel and natural gas obligations, minimum railroad transportation obligations, and minimum port facility obligations.
                                                                        
          includes accrued interest.
                                                                        
          this is for services to be provided in future periods.
                                                                        
          cash and cash equivalents
                                                                        
          credit facility
                                                                        
          revolving loans drawn
                                                                        
          senior notes
                                                                        
          senior notes drawn
                                                                        
          term loan
                                                                        
          term loans drawn
                                                                        
          letter of credit obligations and other commitments
                                                                        
          borrowing capacity available
                                                                        
          sales volume
                                                                        
          revenue per ton
                                                                        
          cash cost per ton
                                                                        
          dd&a per ton
                                                                        
          u.s. iron ore tons are reported in long tons.
                                                                        
          eastern canadian lron ore tons are reported in metric tons, f.o.b. eastern canada.
                                                                        
          asia pacific iron ore tons are reported in metric tons, f.o.b. the port.
                                                                        
          north american coal tons are reported in short tons, f.o.b. the mine.
                                                                        
          japan
                                                                        
          china
                                                                        
          the impact of product revenue resulted from the difference between the estimated price and the actual price was recorded in the second quarter of each respective year in the table above.
                                                                        
          2009
                                                                        
          2010
                                                                        
          2011
                                                                        
          2012
                                                                        
          u.s. plan discount rate
                                                                        
          canadian pension plan discount rate
                                                                        
          canadian opeb plan discount rate
                                                                        
          rate of compensation increase
                                                                        
          u.s. expected return on plan assets
                                                                        
          canadian expected return on plan assets
                                                                        
          decrease discount rate .25 percent
                                                                        
          decrease return on assets 1 percent
                                                                        
          increase medical trend rate 1 percent
                                                                        
          item 7a. quantitative
                                                                        
          item 8.
                                                                        
          assets
                                                                        
          current assets
                                                                        
          accounts receivable
        349,000,000 -16,000,000 24,000,000 -223,000,000 106,000,000 191,000,000 94,000,000 -27,000,000 284,000,000 169,000,000 -76,000,000 -257,000,000                                                     
          inventories
        -84,000,000 3,000,000 214,000,000 182,000,000 -195,000,000 -37,000,000 235,000,000 -8,000,000 132,000,000 135,000,000 196,000,000 207,000,000 412,000,000 246,000,000 -222,000,000 -372,000,000 -236,000,000 -385,000,000 -172,000,000 -141,800,000 121,900,000   -6,900,000 1,700,000 93,700,000 -224,800,000 100,000,000 68,500,000 67,400,000 -193,000,000  80,500,000                                
          supplies and other inventories
                                                                        
          deferred and refundable taxes
                                                                        
          derivative assets
                                                                        
          other current assets
                                                                        
          total current assets
                                                                        
          property, plant and equipment
                                                                        
          other assets
                                                                        
          investments in ventures
                                                      542,400,000 -11,200,000 -1,600,000 -2,300,000 -1,200,000 -100,000 -9,100,000 -800,000 -105,100,000 -76,300,000 -2,700,000 -72,200,000 -600,000 -6,300,000 -42,400,000 -18,100,000   
          goodwill
                                                                        
          intangible assets
                                                                        
          deferred income taxes
        -125,000,000 -80,000,000 -150,000,000 -151,000,000     -18,000,000 116,000,000 20,000,000 -4,000,000 -120,000,000 59,000,000   332,000,000 215,000,000 10,000,000 -11,100,000 -17,400,000   -5,900,000            -200,000 -2,600,000 -3,200,000 165,800,000 -941,700,000 -98,600,000 82,000,000 -75,200,000 -46,300,000 479,500,000 -874,700,000 770,700,000 -248,500,000 -52,500,000 -90,000,000 61,700,000 14,200,000 -56,600,000 15,200,000 22,600,000 34,000,000 82,200,000 -84,500,000 65,700,000 -2,600,000 -85,900,000 500,000 -700,000 -2,400,000 
          other non-current assets
                                                                        
          total other assets
                                                                        
          liabilities
                                                                        
          current liabilities
                                                                        
          accounts payable
                                                                        
          accrued employment costs
                                                                        
          income taxes payable
                                                                        
          state and local taxes payable
                                                                        
          below-market sales contracts — current
                                                                        
          current portion of term loan
                                                                        
          accrued expenses
                                                                        
          accrued royalties
                                                                        
          other current liabilities
                                                                        
          total current liabilities
                                                                        
          postemployment benefit liabilities
                                                                        
          pensions
                                                                        
          other postretirement benefits
                                                                        
          total postemployment benefit liabilities
                                                                        
          below-market sales contracts
                                                                        
          other liabilities
                                                                        
          total liabilities
                                                                        
          commitments and contingencies
                                                                        
          equity
                                                       6,900,000 -6,900,000 -11,100,000 11,300,000 -3,000,000 -5,100,000 -3,600,000           
          cliffs shareholders’ equity
                                                                        
          preferred stock — no par value
                                                                        
          class a — 3,000,000 shares authorized and unissued
                                                                        
          class b — 4,000,000 shares authorized and unissued
                                                                        
          common shares — par value 0.125 per share
                                                                        
          authorized — 400,000,000 shares (2010 — 224,000,000);
                                                                        
          issued — 149,195,469 shares (2010 — 138,845,469 shares);
                                                                        
          outstanding — 142,021,718 shares
                                                                        
          capital in excess of par value of shares
                                                                        
          retained earnings
                                                                        
          cost of 7,173,751 common shares in treasury
                                                                        
          accumulated other comprehensive income
                                                                        
          total cliffs shareholders’ equity
                                                                        
          noncontrolling interest
                                                                        
          total equity
                                                                        
          total liabilities and equity
                                                                        
          product
                                -182,400,000 552,000,000 145,400,000  12,700,000 451,300,000 220,700,000                                  
          freight and venture partners’ cost reimbursements
                                                                        
          other operating income
                                                                        
          other income
                                                                        
          gain on acquisition of controlling interests
                                                            -12,300,000 32,200,000 -60,600,000         
          income from continuing operations before income taxes and equity income from ventures
                                                                        
          equity income from ventures
                                                                        
          income from discontinued operations, net of tax
                                      500,000                                  
          average number of shares
                                                                        
          basic
                                -5,809,000,000 -13,756,000,000 289,525,000,000  260,000,000 352,000,000 297,266,000,000                                  
          diluted
                                -8,901,000,000 -4,046,000,000 289,525,000,000  8,928,000,000 4,009,000,000 297,266,000,000                                  
          cash dividends declared per share
                                                                        
          other comprehensive income, net of tax
                                                                        
          pension and opeb liability
                                                                        
          unrealized net gain on marketable securities
                                                                        
          unrealized net gain on foreign currency translation
                                     1,500,000 700,000                                  
          unrealized net income on derivative financial instruments
                                                                        
          unrealized gain on interest rate swap
                                                                        
          other comprehensive income
                                2,500,000 -4,700,000 8,400,000  -230,300,000 1,400,000 7,700,000                                  
          less: comprehensive income attributable to the noncontrolling interest
                                                                        
          total comprehensive income attributable to
                                                                        
          cliffs shareholders
                                                                        
          cash flow from continuing operations
                                                                        
          operating activities
                                                                        
          adjustments to reconcile net income to net cash provided (used) by operating activities:
                                                                        
          depreciation, depletion and amortization
        272,000,000 288,000,000 393,000,000 282,000,000 258,000,000 235,000,000 228,000,000 230,000,000 235,000,000 249,000,000 247,000,000 242,000,000 246,000,000 237,000,000 250,000,000 301,000,000 239,000,000 208,000,000 217,000,000 124,100,000 72,400,000   22,000,000 22,200,000 21,000,000 19,900,000 20,400,000 19,200,000 25,500,000 23,900,000  21,500,000 26,500,000 35,200,000 34,900,000 35,600,000 30,500,000 33,000,000 144,000,000 155,300,000 153,100,000 144,300,000 140,600,000 143,500,000 132,900,000 132,100,000 117,300,000 124,000,000 117,700,000 105,400,000 79,800,000 82,800,000 84,400,000 88,500,000 66,600,000 63,900,000 58,000,000 59,200,000 55,500,000 71,900,000 51,100,000   
          goodwill impairment
                                                                        
          derivatives and currency hedges
                                                3,200,000 -39,800,000 35,000,000 5,200,000 -7,900,000 3,000,000 18,900,000 -9,900,000 15,400,000 5,400,000 -47,100,000 -42,700,000 128,800,000 -60,600,000 -25,300,000 -81,900,000 -23,600,000 -60,200,000 -102,100,000 -18,600,000     
          foreign exchange loss
                                                                   3,400,000     
          share-based compensation
                                                                  2,000,000 3,400,000 6,000,000 4,600,000 6,400,000 4,400,000 
          pensions and other postretirement benefits
                                                   -11,000,000 19,300,000   -24,800,000 17,000,000          9,100,000 -3,300,000 -4,500,000 -26,400,000 600,000 -2,600,000 
          changes in deferred revenue and below-market sales contracts
                                                -600,000 -20,500,000 -16,800,000 -14,900,000 11,700,000 -13,000,000 100,000 -23,300,000    15,800,000             
          changes in operating assets and liabilities:
                                                                        
          receivables and other assets
                    285,000,000 337,000,000 -4,000,000 -441,000,000 -272,000,000 -423,000,000 -480,000,000 -301,800,000 -105,900,000   98,000,000 28,700,000 -72,100,000 199,900,000 -43,900,000 34,400,000 -134,500,000 196,300,000  600,000 -94,300,000 38,500,000 76,000,000 156,500,000 64,900,000 71,700,000 13,400,000 102,600,000 -51,000,000 -15,500,000 102,700,000 43,800,000 -32,200,000 -76,900,000 -9,500,000 143,900,000 -69,500,000 173,700,000 -166,700,000 -133,100,000 43,500,000 -164,100,000 49,100,000 12,300,000 -15,300,000 -23,400,000 2,200,000     
          product inventories
                                          -66,100,000 14,200,000 141,200,000 -62,500,000 -154,900,000 122,500,000 41,600,000 95,000,000 88,200,000 -194,000,000 110,300,000 195,500,000 -46,900,000 -219,000,000 54,000,000 68,300,000 32,700,000 -229,500,000  90,200,000 -5,500,000 -69,500,000 22,000,000 65,500,000 -12,900,000 -66,900,000 4,300,000 156,400,000 -74,400,000 -130,900,000 
          payables and accrued expenses
                                             -2,900,000 -152,700,000 51,200,000 8,000,000 -47,500,000 68,900,000 -139,200,000 -113,800,000 36,600,000 -185,000,000 -103,900,000 184,300,000 166,500,000 -64,400,000 38,200,000 96,900,000 -48,300,000 64,000,000 -22,900,000 -44,800,000 65,400,000 -102,600,000 -59,000,000 33,900,000 45,000,000 100,500,000 -37,100,000 
          investing activities
                                                                        
          acquisition of controlling interests, net of cash acquired
                                                            -23,000,000 -864,300,000 -7,300,000 -99,900,000         
          net settlements in canadian dollar foreign exchange contracts
                                                                       
          investment in consolidated thompson senior notes
                                                                        
          purchase of property, plant and equipment
        -140,000,000 -157,000,000 -112,000,000 -152,000,000 -205,000,000 -151,000,000 -157,000,000 -182,000,000 -165,000,000 -162,000,000 -131,000,000 -188,000,000 -227,000,000 -248,000,000 -232,000,000 -236,000,000 -175,000,000 -162,000,000 -136,000,000 -146,100,000 -96,000,000   -191,100,000 -153,500,000 -161,700,000 -132,700,000 -97,200,000 -69,300,000 -29,700,000 -12,400,000  -29,500,000 -23,300,000 -10,400,000 -22,900,000 -23,500,000 -18,500,000 -15,900,000 -68,900,000 -119,400,000 -241,000,000 -270,800,000 -230,400,000 -333,900,000 -276,600,000 -275,900,000 -241,100,000 -401,800,000 -234,400,000 -178,800,000 -65,700,000 -116,800,000 -87,100,000 -44,100,000 -18,900,000 -20,500,000 -35,300,000 -30,100,000 -30,400,000 -34,800,000 -88,600,000 -24,900,000 -34,200,000 
          investment in marketable securities
                                                                    300,000 -3,700,000   
          redemption of marketable securities
                                                            17,200,000        100,000 -2,600,000 10,700,000 9,600,000 
          proceeds from sale of assets
                                                      7,700,000 300,000    300,000 58,200,000 700,000 200,000 4,500,000 23,800,000 1,700,000 900,000 24,000,000 14,600,000 
          other investing activities
        2,000,000 19,000,000 1,000,000 7,000,000 -18,000,000 5,000,000 5,000,000 3,000,000 44,000,000 2,000,000 6,000,000 3,000,000 18,000,000 19,000,000 1,000,000 3,000,000 1,000,000 1,000,000 2,000,000 8,200,000   400,000 2,700,000 8,500,000 20,500,000     -6,600,000 -5,500,000 5,500,000 6,100,000 300,000 200,000 200,000 9,300,000 42,500,000 6,900,000 -1,100,000 2,000,000 4,200,000    -4,800,000 16,700,000               
          net cash used by investing activities
        -85,000,000 -138,000,000 -111,000,000 -145,000,000 -2,735,000,000 -146,000,000 -152,000,000 -179,000,000 -121,000,000 -160,000,000 -125,000,000 -185,000,000 -209,000,000 -260,000,000 -232,000,000 -235,000,000 -172,000,000 -107,000,000 -135,000,000 -801,800,000 -87,800,000   -194,900,000 -157,100,000 -166,800,000 -125,600,000 -99,400,000 -73,900,000 -28,400,000 -71,400,000  -36,100,000  -4,900,000  -23,200,000 -18,300,000 -15,700,000 -59,600,000 -76,900,000 -234,100,000 -271,900,000 -228,400,000 -177,100,000 -263,800,000 -268,900,000 -252,000,000 -385,800,000 -197,800,000 -4,683,400,000 -37,400,000 -75,100,000 -935,400,000 -162,300,000 -194,900,000 -29,700,000 -69,600,000 -48,800,000 -31,200,000 -422,400,000 -216,000,000 -146,100,000 -11,100,000 
          financing activities
                                                                        
          borrowings on term loan
                                                                      
          repayment of term loan
                                                -847,100,000 -74,900,000 -24,900,000 -12,500,000 -12,500,000 -12,600,000    -200,000,000         
          borrowings on bridge credit facility
                                                                      
          repayment of bridge credit facility
                                                                      
          borrowings under revolving credit facility
                                                   297,000,000 342,000,000 120,000,000               110,000,000 80,000,000 180,000,000 
          repayment under revolving credit facility
                                                   -72,000,000 -267,000,000 -195,000,000                -270,000,000 -320,000,000 -20,000,000 
          debt issuance costs
        -4,000,000 -12,000,000 -1,000,000 -13,000,000 -36,000,000 -60,000,000 -13,000,000       -1,000,000 -16,000,000 -18,500,000 400,000     -1,500,000  -3,500,000 -5,200,000 -500,000 -33,100,000          -7,100,000               
          repayment of 200 million term loan
                                                                        
          repayment of other borrowings
                                                                  -1,300,000 -3,000,000 -700,000 -900,000 -6,000,000 -800,000 
          other financing activities
        -60,000,000 -22,000,000 -53,000,000 -33,000,000 -48,000,000 -54,000,000 3,000,000 -25,000,000 -39,000,000 -44,000,000 -71,000,000 -50,000,000 -51,000,000 -42,000,000 -35,000,000 -38,000,000 53,000,000 1,000,000 -40,000,000 10,300,000 20,300,000   -200,000 1,400,000 -2,500,000 -8,400,000 -1,800,000 -36,800,000 -3,400,000 -5,500,000  -3,100,000 -5,200,000 -4,200,000 -7,100,000 3,800,000 -28,300,000 -14,300,000 -35,600,000 -26,400,000 -2,300,000 -10,900,000 -15,400,000 -12,600,000 -12,800,000 -12,100,000 1,000,000 -19,900,000 -7,600,000 -20,700,000 1,200,000 12,000,000 -8,900,000 -7,500,000 -9,100,000 8,400,000        
          net cash from financing activities
                         -441,000,000 512,000,000                 -37,200,000 -170,200,000 -41,600,000 310,000,000 -273,300,000 -333,900,000 -31,300,000   92,400,000 -164,400,000   -391,500,000 -292,800,000 2,032,000,000 627,400,000 -25,000,000 964,900,000   -20,000,000 -2,800,000    -171,900,000 71,300,000 153,800,000 
          effect of exchange rate changes on cash
        -1,000,000                          -1,300,000 -1,200,000 200,000  1,300,000 -900,000 -500,000 800,000 -1,300,000 400,000 -1,300,000 -10,900,000 -12,500,000 3,900,000 -13,700,000 -100,000 1,400,000 200,000 -3,200,000 2,900,000 10,700,000 -23,100,000 3,700,000 4,100,000 8,400,000 17,100,000 -3,100,000 1,700,000 1,400,000 2,800,000 8,000,000 800,000 -37,100,000 -43,500,000 5,800,000 6,700,000 
          increase in cash and cash equivalents
                                          -225,300,000   -79,500,000 64,800,000 -115,900,000 36,700,000 35,500,000 -23,900,000 92,000,000    -399,300,000 -23,500,000 307,000,000 -2,029,600,000 701,000,000 597,300,000 441,900,000 -22,900,000 47,700,000 142,800,000 85,300,000 177,300,000 -81,700,000 -209,300,000 67,900,000 133,900,000 29,400,000 
          cash and cash equivalents at beginning of year
                                                                   179,000,000     
          cash and cash equivalents at end of year
                                                                   97,300,000     
          january 1, 2009
                                                                        
          comprehensive income
                                                                        
          reclassification of net gains on derivative financial instruments into net income
                                                                        
          total comprehensive income, net of tax
                                                                        
          purchase of subsidiary shares from noncontrolling interest
                                                                        
          undistributed losses to noncontrolling interest
                                                                        
          capital contribution by noncontrolling interest to subsidiary
                                                                        
          issuance of common shares
                                                                        
          purchase of additional noncontrolling interest
                                                                        
          stock and other incentive plans
                                                                        
          conversion of preferred stock
                                                                        
          december 31, 2009
                                                                        
          unrealized gain on derivative instruments
                                                                        
          acquisition of controlling interest
                                                                        
          december 31, 2010
                                                                        
          unrealized net income on marketable securities
                                                                        
          unrealized net income on foreign currency translation
                                                                        
          unrealized gain on derivative financial instruments
                                                                        
          share buyback
                                                                        
          equity offering
                                                                        
          december 31, 2011
                                                                        
          freewest
                                                                        
          segment
                                                                        
          asset class
                                                                        
          buildings
                                                                        
          mining equipment
                                                                        
          processing equipment
                                                                        
          information technology
                                                                        
          plant and equipment
                                                                        
          plant and equipment and mine assets
                                                                        
          motor vehicles, furniture & equipment
                                                                        
          land rights and mineral rights
                                                                        
          office and information technology
                                                                        
          railroad equipment
                                                                        
          electric power facilities
                                                                        
          port facilities
                                                                        
          interest capitalized during construction
                                                                        
          land improvements
                                                                        
          construction in progress
                                                                        
          allowance for depreciation and depletion
                                                                        
          land rights
                                                                        
          mineral rights:
                                                                        
          cost
                                                                        
          less depletion
                                                                        
          net mineral rights
                                                                        
          investment
                                                                        
          ausquest
                                                                        
          cockatoo
                                                                        
          hibbing
                                                                        
          reimbursements for:
                                                                        
          freight
                                -5,200,000 34,200,000 11,600,000                                      
          venture partners’ cost
                                                                        
          total reimbursements
                                                                        
          revenues from product sales and services:
                                                                        
          u.s iron ore
                                                                        
          total revenues from product sales and services for reportable segments
                                                                        
          sales margin:
                                                                        
          depreciation, depletion and amortization:
                                                                        
          easten canadian iron ore
                                                                        
          total depreciation, depletion and amortization
                                                                        
          capital additions :
                                                                        
          total capital additions
                                                                        
          assets:
                                                                        
          total segment assets
                                                                        
          corporate
                                                                        
          includes capital lease additions.
                                                                        
          revenue
                                                                        
          united states
                                                                        
          canada
                                                                        
          other countries
                                                                        
          total revenue
                                                                        
          australia
                                                                        
          total property, plant and equipment
                                                                        
          revenue is attributed to countries based on the location of the customer and includes both product sales and services.
                                                                        
          revenue category
                                                                        
          iron ore
                                                                        
          coal
                                                                        
          derivative instrument
                                                                        
          derivatives designated as hedging instruments under asc 815:
                                                                        
          foreign exchange contracts
                                                                        
          total derivatives designated as hedging instruments under asc 815
                                                                        
          derivatives not designated as hedging instruments under asc 815:
                                                                        
          customer supply agreements
                                                                        
          provisional pricing arrangements
                                                                        
          total derivatives not designated as hedging instruments under asc 815
                                                                        
          total derivatives
                                                                        
          derivatives in cash flow hedging relationships
                                                                        
          australian dollar foreign exchange contracts
                                                                        
          derivative not designated as hedging instruments
                                                                        
          united taconite purchase provision
                                                                        
          consideration
                                                                        
          cash
                                                                        
          fair value of total consideration transferred
                                                                        
          recognized amounts of identifiable assets acquired and liabilities assumed
                                                                        
          mineral rights
                                                                        
          total identifiable assets acquired
                                                                        
          liabilities:
                                                                        
          accrued liabilities
                                                                        
          convertible debentures
                                                                        
          long-term deferred tax liabilities
                                                                        
          senior secured notes
                                                                        
          other long-term liabilities
                                                                        
          total identifiable liabilities assumed
                                                                        
          total identifiable net assets acquired
                                                                        
          noncontrolling interest in bloom lake
                                                                        
          preliminary goodwill
                                                                        
          total net assets acquired
                                                                        
          working capital adjustments
                                                                        
          fair value of cliffs’ equity interest in wabush held prior to acquisition of remaining interest
                                                                        
          in-process inventories
                                                                        
          pension and opeb obligations
                                                                        
          mine closure obligations
                                                                        
          deferred taxes
                                                                        
          equity instruments
                                                                        
          fair value of cliffs’ ownership interest in freewest held prior to acquisition of remaining interest
                                                                        
          marketable securities
                                                                        
          fair value of cliffs’ ownership interest in spider held prior to acquisition of remaining interest
                                                                        
          noncontrolling interest in spider
                                                                        
          land and mineral rights
                                                                        
          beginning balance
                                                                        
          arising in business combinations
                                                                        
          impairment
                                                                        
          impact of foreign currency translation
                                                                        
          ending balance
                                                                        
          definite lived intangible assets:
                                                                        
          permits
                                                                        
          utility contracts
                                                                        
          easements
                                                                        
          leases
                                                                        
          unpatented technology
                                                                        
          total intangible assets
                                                                        
          total below-market sales contracts
                                                                        
          upon the acquistion of consolidated thompson, this intangible asset is now eliminated through intercompany eliminations. the easement agreement is between wabush and consolidated thompson.
                                                                        
          intangible asset
                                                                        
          year ending december 31
                                                                        
          2013
                                                                        
          2014
                                                                        
          2015
                                                                        
          2016
                                                                        
          description
                                                                        
          cash equivalents
                                                                        
          international marketable securities
                                                                        
          derivative liabilites
                                                                        
          u.s. marketable securities
                                                                        
          beginning balance — january 1
                                                                        
          total gains
                                                                        
          included in earnings
                                                                        
          included in other comprehensive income
                                                                        
          settlements
                                                                        
          transfers into level 3
                                                                        
          transfers out of level 3
                                                                        
          ending balance — december 31
                                                                        
          total gains for the period included in earnings attributable to the change in unrealized gains on assets still held at the reporting date
                                                                        
          total losses
                                                                        
          total losses for the period included in earnings attributable to the change in unrealized losses on assets still held at the reporting date
                                                                        
          long-term receivables:
                                                                        
          customer supplemental payments
                                                                        
          arcelormittal usa — receivable
                                                                        
          total long-term receivables
                                                                        
          long-term debt:
                                                                        
          term loan — 1.25 billion
                                                                        
          senior notes — 700 million
                                                                        
          senior notes — 1.3 billion
                                                                        
          senior notes — 400 million
                                                                        
          senior notes — 325 million
                                                                        
          customer borrowings
                                                                        
          total long-term debt
                                                                        
          includes current portion.
                                                                        
          debt instrument
                                                                        
          1.25 billion term loan
                                                                        
          700 million 4.875% 2021 senior notes
                                                                        
          1.3 billion senior notes:
                                                                        
          500 million 4.80% 2020 senior notes
                                                                        
          800 million 6.25% 2040 senior notes
                                                                        
          400 million 5.90% 2020 senior notes
                                                                        
          325 million private placement senior notes:
                                                                        
          series 2008a — tranche a
                                                                        
          series 2008a — tranche b
                                                                        
          1.75 billion credit facility:
                                                                        
          revolving loan
                                                                        
          1 billion senior notes:
                                                                        
          500 million 6.25% 2040 senior notes
                                                                        
          600 million credit facility:
                                                                        
          2017 and thereafter
                                                                        
          total minimum lease payments
                                                                        
          amounts representing interest
                                                                        
          present value of net minimum lease payments
                                                                        
          environmental
                                                                        
          mine closure
                                                                        
          operating mines:
                                                                        
          total mine closure
                                                                        
          total environmental and mine closure obligations
                                                                        
          less current portion
                                                                        
          long term environmental and mine closure obligations
                                                                        
          asset retirement obligation at beginning of period
                                                                        
          accretion expense
                                                                        
          exchange rate changes
                                                                        
          revision in estimated cash flows
                                                                        
          payments
                                                                        
          acquired through business combinations
                                                                        
          asset retirement obligation at end of period
                                                                        
          defined benefit pension plans
                                                                        
          defined contribution pension plans
                                                                        
          change in benefit obligations:
                                                                        
          benefit obligations — beginning of year
                                                                        
          service cost
                                                                        
          interest cost
                                                                        
          plan amendments
                                                                        
          actuarial loss
                                                                        
          benefits paid
                                                                        
          participant contributions
                                                                        
          federal subsidy on benefits paid
                                                                        
          exchange rate gain
                                                                        
          benefit obligations — end of year
                                                                        
          change in plan assets:
                                                                        
          fair value of plan assets — beginning of year
                                                                        
          actual return on plan assets
                                                                        
          employer contributions
                                                                        
          asset transfers
                                                                        
          fair value of plan assets — end of year
                                                                        
          funded status at december 31:
                                                                        
          fair value of plan assets
                                                                        
          benefit obligations
                                                                        
          funded status
                                                                        
          amount recognized at december 31
                                                                        
          amounts recognized in statements of financial position:
                                                                        
          noncurrent liabilities
                                                                        
          net amount recognized
                                                                        
          amounts recognized in accumulated other comprehensive income:
                                                                        
          net actuarial loss
                                                                        
          prior service cost
                                                                        
          transition asset
                                                                        
          the estimated amounts that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2012:
                                                                        
          benefit obligation
                                                                        
          expected return on plan assets
                                                                        
          amortization:
                                                                        
          net asset
                                                                        
          prior service costs
                                                                        
          net periodic benefit cost
                                                                        
          current year actuarial (gain)/loss
                                                                        
          amortization of net income
                                                                        
          current year prior service cost
                                                                        
          amortization of prior service (cost) credit
                                                                        
          amortization of transition asset
                                                                        
          total recognized in other comprehensive income
                                                                        
          total recognized in net periodic cost and other comprehensive income
                                                                        
          effect of change in mine ownership & noncontrolling interest
                                                                        
          canadian plan discount rate
                                                                        
          u.s. plan health care cost trend rate assumed for next year
                                                                        
          canadian plan health care cost trend rate assumed for next year
                                                                        
          ultimate health care cost trend rate
                                                                        
          u.s. plan year that the ultimate rate is reached
                                                                        
          canadian plan year that the ultimate rate is reached
                                                                        
          effect on total of service and interest cost
                                                                        
          effect on postretirement benefit obligation
                                                                        
          asset category
                                                                        
          equity securities
                                                                        
          fixed income
                                                                        
          hedge funds
                                                                        
          private equity
                                                                        
          structured credit
                                                                        
          real estate
                                                                        
          equity securities:
                                                                        
          u.s. large-cap
                                                                        
          u.s. small/mid-cap
                                                                        
          international
                                                                        
          beginning balance — january 1, 2011
                                                                        
          actual return on plan assets:
                                                                        
          relating to assets still held at the reporting date
                                                                        
          relating to assets sold during the period
                                                                        
          purchases
                                                                        
          sales
                                                                        
          ending balance — december 31, 2011
                                                                        
          beginning balance — january 1, 2010
                                                                        
          acquired through business combination
                                                                        
          purchases, sales and settlements
                                                                        
          transfers in (out) of level 3
                                                                        
          ending balance — december 31, 2010
                                                                        
          company contributions
                                                                        
          2012 (expected)*
                                                                        
          *
                                                                        
          2017-2021
                                                                        
          underfunded status of plan
                                                                        
          additional shutdown and early retirement benefits
                                                                        
          performance share plan year
                                                                        
          year of grant
                                                                        
          reduction of operating income from continuing operations before income taxes and equity income from ventures
                                                                        
          income tax benefit
                                 -25,700,000 3,700,000  -2,300,000 17,500,000 -15,700,000                                  
          reduction of net income attributable to cliffs shareholders
                                                                        
          reduction of earnings per share attributable to cliffs shareholders:
                                                                        
          stock options:
                                                                        
          options outstanding at beginning of year
                                                                        
          granted during the year
                                                                        
          exercised
                                                                        
          cancelled or expired
                                                                        
          options outstanding at end of year
                                                                        
          options exercisable at end of year
                                                                        
          restricted awards:
                                                                        
          outstanding and restricted at beginning of year
                                                                        
          vested
                                                                        
          cancelled
                                                                        
          outstanding and restricted at end of year
                                                                        
          performance shares:
                                                                        
          outstanding at beginning of year
                                                                        
          issued
                                                                        
          forfeited/cancelled
                                                                        
          outstanding at end of year
                                                                        
          vested or expected to vest as of december 31, 2011
                                                                        
          directors’ retainer and voluntary shares:
                                                                        
          reserved for future grants or awards at end of year:
                                                                        
          employee plans
                                                                        
          directors’ plans
                                                                        
          the shares granted during the year include 71,956 shares, 114,371 shares and 99,958 shares for each year presented, respectively, related to the 50 percent payout associated with the prior-year pool as actual payout exceeded target.
                                                                        
          outstanding, beginning of year
                                                                        
          granted
                                                                        
          forfeited/expired
                                                                        
          outstanding, end of year
                                                                        
          foreign
                                                                        
          current provision
                                                                        
          united states federal
                                                                        
          united states state & local
                                                                        
          deferred provision
                                                                        
          total provision on continuing operations
                                                                        
          tax at u.s. statutory rate of 35 percent
                                                                        
          increase due to:
                                                                        
          foreign exchange remeasurement
                                                                        
          impact of tax law change
                                                                        
          percentage depletion in excess of cost depletion
                                                                        
          legal entity restructuring
                                                                        
          other comprehensive (income) loss:
                                                                        
          minimum pension/opeb liability
                                                                        
          mark-to-market adjustments
                                                                        
          paid in capital — stock based compensation
                                                                        
          deferred tax assets:
                                                                        
          postretirement benefits other than pensions
                                                                        
          alternative minimum tax credit carryforwards
                                                                        
          capital loss carryforwards
                                                                        
          development
                                                                        
          asset retirement obligations
                                                                        
          operating income carryforwards
                                                                        
          properties
                                                                        
          lease liabilities
                                                                        
          total deferred tax assets before valuation allowance
                                                                        
          deferred tax asset valuation allowance
                                                                        
          net deferred tax assets
                                                                        
          deferred tax liabilities:
                                                                        
          investment in ventures
                                                                       -1,100,000 
          income tax uncertainties
                                                                 57,600,000 3,600,000 -2,200,000     
          financial derivatives
                                                                        
          total deferred tax liabilities
                                                                        
          net deferred tax (liabilities) assets
                                                                        
          current
                                                                        
          long-term
                                                                        
          total united states
                                                                        
          total deferred tax assets
                                                                        
          unrecognized tax benefits balance as of january 1
                                                                        
          increases for tax positions in prior years
                                                                        
          increases for tax positions in current year
                                                                        
          increase due to foreign exchange
                                                                        
          lapses in statutes of limitations
                                                                        
          unrecognized tax benefits balance as of december 31
                                                                        
          as of december 31, 2009:
                                                                        
          postretirement benefit liability
                                                                        
          foreign currency translation adjustments
                                                                        
          unrealized net gain on derivative financial instruments
                                                                        
          unrealized loss on securities
                                                                        
          as of december 31, 2010:
                                                                        
          unrealized gain on securities
                                                                        
          as of december 31, 2011:
                                                                        
          balance december 31, 2008
                                                                        
          change during 2009
                                                                        
          balance december 31, 2009
                                                                        
          change during 2010
                                                                        
          balance december 31, 2010
                                                                        
          change during 2011
                                                                        
          balance december 31, 2011
                                                                        
          net income from continuing operations attributable to cliffs shareholders
                                                                        
          weighted-average number of shares:
                                                                        
          employee stock plans
                                                                        
          earnings per common share attributable to cliffs shareholders — basic:
                                                                        
          earnings per common share attributable to cliffs shareholders — diluted:
                                                                        
          capital additions
                              157,700,000                                          
          cash paid for capital expenditures
                                                                        
          difference
                                                                        
          non-cash accruals
                              -10,300,000                                          
          capital leases
                                                                        
          taxes paid on income
                              100,000                                          
          interest paid on debt obligations
                                                                        
          product revenues to related parties
                                                                        
          total product revenues
                                                                        
          related party product revenue as a percent of total product revenue
                                                                        
          less: income attributable to noncontrolling interest
                                                                        
          earnings per common share attributable to cliffs shareholders - basic and diluted
                                                                        
          item 9.
                                                                        
          item 9a.
                                                                        
          item 9b.
                                                                        
          item 10.
                                                                        
          item 11.
                                                                        
          item 12.
                                                                        
          plan category
                                                                        
          equity compensation plans approved by security holders
                                                                        
          equity compensation plans not approved by security holders
                                                                        
          includes 866,920 performance share awards for which issuance is dependent upon meeting certain performance targets, and 316,055 restricted awards for which issuance is based upon a three-year vesting period.
                                                                        
          the mpi plan, the opip plan and the vnqdc plan provide for the issuance of common shares, but do not provide for a specific amount available under the plans. descriptions of those plans are set forth below.
                                                                        
          item 13.
                                                                        
          item 14.
                                                                        
          item 15.
                                                                        
          by:
                                                                        
          signatures
                                                                        
          /s/ j. carrabba j. carrabba
                                                                        
          /s/ l. brlas l. brlas
                                                                        
          /s/ t. m. paradie t. m. paradie
                                                                        
          * s. m. cunningham
                                                                        
          * b. j. eldridge
                                                                        
          * a. r. gluski
                                                                        
          * s. m. green
                                                                        
          * j. k. henry
                                                                        
          * j. f. kirsch
                                                                        
          * f. r. mcallister
                                                                        
          * r. phillips
                                                                        
          * r. k. riederer
                                                                        
          * r. ross
                                                                        
          * a. schwartz
                                                                        
          exhibit number
                                                                        
          2.1
                                                                        
          3.1
                                                                        
          3.2
                                                                        
          4.1
                                                                        
          4.2
                                                                        
          4.3
                                                                        
          4.4
                                                                        
          4.5
                                                                        
          4.6
                                                                        
          4.7
                                                                        
          4.8
                                                                        
          10.1
                                                                        
          10.2
                                                                        
          10.3
                                                                        
          10.4
                                                                        
          10.5
                                                                        
          10.6
                                                                        
          10.7
                                                                        
          10.8
                                                                        
          10.9
                                                                        
          10.10
                                                                        
          10.11
                                                                        
          10.12
                                                                        
          10.13
                                                                        
          10.14
                                                                        
          10.15
                                                                        
          10.16
                                                                        
          10.17
                                                                        
          10.18
                                                                        
          10.19
                                                                        
          10.20
                                                                        
          10.21
                                                                        
          10.22
                                                                        
          10.23
                                                                        
          10.24
                                                                        
          10.25
                                                                        
          10.26
                                                                        
          10.27
                                                                        
          10.28
                                                                        
          10.29
                                                                        
          10.30
                                                                        
          10.31
                                                                        
          10.32
                                                                        
          10.33
                                                                        
          10.34
                                                                        
          10.35
                                                                        
          10.36
                                                                        
          10.37
                                                                        
          10.38
                                                                        
          10.39
                                                                        
          10.40
                                                                        
          10.41
                                                                        
          10.42
                                                                        
          10.43
                                                                        
          10.44
                                                                        
          10.45
                                                                        
          10.46
                                                                        
          10.47
                                                                        
          10.48
                                                                        
          10.49
                                                                        
          10.50
                                                                        
          10.51
                                                                        
          10.52
                                                                        
          10.53
                                                                        
          10.54
                                                                        
          10.55
                                                                        
          10.56
                                                                        
          10.57
                                                                        
          10.58
                                                                        
          10.59
                                                                        
          10.60
                                                                        
          10.61
                                                                        
          10.62
                                                                        
          10.63
                                                                        
          10.64
                                                                        
          10.65
                                                                        
          10.66
                                                                        
          10.67
                                                                        
          10.68
                                                                        
          10.69
                                                                        
          **
                                                                        
          10.70
                                                                        
          10.71
                                                                        
          10.72
                                                                        
          10.73
                                                                        
          10.74
                                                                        
          10.75
                                                                        
          10.76
                                                                        
          10.77
                                                                        
          10.78
                                                                        
          10.79
                                                                        
          10.80
                                                                        
          12
                                                                        
          21
                                                                        
          23
                                                                        
          24
                                                                        
          31.1
                                                                        
          31.2
                                                                        
          32.1
                                                                        
          32.2
                                                                        
          95
                                                                        
          99
                                                                        
          101.ins
                                                                        
          101.sch
                                                                        
          101.cal
                                                                        
          101.def
                                                                        
          101.lab
                                                                        
          101.pre
                                                                        
          ***
                                                                        
          ¨
                                                                        
          pension and opeb credits
        -57,000,000 -48,000,000 -34,000,000 -48,000,000 -54,000,000 -53,000,000 -53,000,000 -51,000,000 -44,000,000 -40,000,000 -39,000,000 -40,000,000 -51,000,000 -27,000,000 -27,000,000 -27,000,000                                                 
          restructuring and other charges
        -6,000,000 3,000,000    2,000,000 25,000,000 104,000,000                                                         
          asset impairment
                                                                        
          changes in operating assets and liabilities, net of business combination:
                                                                        
          income taxes
        -2,000,000 5,000,000 3,000,000 7,000,000 29,000,000 -34,000,000 -11,000,000 -1,000,000 106,000,000 -153,000,000 154,000,000 15,000,000 87,000,000 -54,000,000                                                   
          pension and opeb payments and contributions
        -33,000,000 -48,000,000 -30,000,000 -43,000,000 -33,000,000 -100,000,000 -30,000,000 -32,000,000 -10,000,000 -26,000,000 -28,000,000 -30,000,000 -30,000,000 -60,000,000 -54,000,000 -60,000,000 -56,000,000 -48,000,000 -175,000,000                                              
          payables, accrued employment and accrued expenses
        -47,000,000 -28,000,000 -60,000,000 57,000,000 -191,000,000 -41,000,000 -6,000,000 -170,000,000 99,000,000 -17,000,000 12,000,000 -90,000,000                                                     
          net cash provided (used) by operating activities
        -13,000,000 -143,000,000 45,000,000 -351,000,000    142,000,000    -39,000,000    533,000,000 1,516,000,000   -207,800,000 246,000,000                          96,200,000 -129,000,000      395,300,000 169,000,000 66,700,000  154,900,000       
          acquisition of stelco, net of cash acquired
                                                                        
          proceeds from sale of business
                                                                        
          repurchase of common shares
            -125,000,000 -608,000,000 -58,000,000   -30,000,000 -34,000,000 -157,000,000 -19,000,000        -128,600,000 -124,300,000                                      
          proceeds from issuance of common shares
                        322,000,000                                              
          proceeds from issuance of debt
                        1,000,000,000 100,000                                          
          repayments of senior notes
            -193,000,000 -652,000,000                                                         
          borrowings (repayments) under credit facilities
        -396,000,000 -530,000,000 122,000,000 -305,000,000 1,513,000,000 -323,000,000                                                           
          net cash provided (used) by financing activities
        89,000,000 286,000,000 68,000,000 499,000,000    -131,000,000    257,000,000   -621,000,000 -311,000,000    1,064,800,000 -176,900,000          -7,000,000   -20,400,000 -93,400,000         345,900,000    -21,200,000        174,200,000         
          net increase in cash and cash equivalents
        -9,000,000 5,000,000 2,000,000 3,000,000 22,000,000 -71,000,000 80,000,000 -168,000,000 167,000,000 -3,000,000 -25,000,000 33,000,000                                                     
          cash, cash equivalents, and restricted cash at beginning of year
                                                                        
          cash, cash equivalents, and restricted cash at end of year
                                                                        
          restricted cash
        1,000,000 -1,000,000 -6,000,000                                                             
          asset impairments
            15,000,000 64,000,000                                                         
          proceeds from issuance of senior notes
         850,000,000 850,000,000  596,000,000 825,000,000                         557,800,000                                
          cash, cash equivalents, and restricted cash at beginning of period
         60,000,000                                                             
          cash, cash equivalents, and restricted cash at end of period
         5,000,000 5,000,000 63,000,000                                                             
          cash and cash equivalents at end of period
         5,000,000 4,000,000 57,000,000  -71,000,000 80,000,000 30,000,000  -3,000,000 -25,000,000 59,000,000  9,000,000 12,000,000 35,000,000 -31,000,000 -37,000,000 110,000,000  -17,700,000    22,100,000 -53,000,000 430,200,000  94,600,000 15,900,000 786,600,000  -60,700,000  59,900,000 15,000,000 -6,000,000 -79,500,000 355,700,000 -115,900,000 36,700,000 35,500,000 -23,900,000 287,200,000 155,700,000 -119,700,000 36,900,000 122,300,000  307,000,000 -2,029,600,000 2,267,700,000  441,900,000 -22,900,000 550,400,000  85,300,000    67,900,000 133,900,000 186,500,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                        
          acquisition of fpt, net of cash acquired
                                                                       
          loss on extinguishment of debt
             6,000,000 21,000,000     -1,000,000 -4,000,000 66,000,000 14,000,000          7,000,000                                    
          net cash used by financing activities
             159,000,000   -364,000,000 -610,000,000               -59,000,000 -150,100,000 -157,800,000  -82,000,000    -164,800,000                                
          cash and cash equivalents at beginning of period
             198,000,000  26,000,000  48,000,000 112,000,000     823,200,000  -29,400,000 1,007,700,000   285,200,000 290,900,000 195,200,000 521,600,000  1,566,700,000  502,700,000     157,100,000 
          borrowings under credit facilities
               342,000,000 325,000,000 1,033,000,000 1,646,000,000 1,099,000,000 1,390,000,000 1,545,000,000 1,715,000,000 1,673,000,000 1,522,000,000 1,158,000,000 1,260,000,000              14,800,000 295,000,000 188,100,000 103,500,000 130,000,000                       
          amortization of inventory step-up
                        11,000,000 37,000,000 81,000,000 22,000,000 14,600,000                                            
          acquisition of arcelormittal usa, net of cash acquired
                                                                       
          series b redeemable preferred stock redemption
                                                                        
          repayments under credit facilities
                -325,000,000 -833,000,000 -2,371,000,000 -1,339,000,000 -1,325,000,000 -1,545,000,000 -1,015,000,000 -1,609,000,000 -1,670,000,000 -1,480,000,000 -1,010,000,000 -150,000,000 -150,000,000                                            
          impairment of long-lived assets
                    29,000,000                      76,600,000                          
          repayments of debt
                    -3,000,000 -36,000,000 -959,000,000 -360,000,000 -7,000,000 -437,000,000 -902,000,000                                              
          payables, accrued expenses and other liabilities
                    -182,000,000 -383,000,000 186,000,000 193,000,000 219,000,000 61,000,000 22,000,000 160,300,000 170,600,000   -10,400,000 -7,600,000 25,400,000 -88,200,000 16,100,000 -74,000,000 66,300,000 -70,900,000  -52,700,000                                
          acquisition of ak steel, net of cash acquired
                           300,000                                            
          net decrease in cash and cash equivalents
                      12,000,000 -13,000,000 -31,000,000 -37,000,000 -2,000,000 55,600,000 -17,700,000    22,100,000 -53,000,000 -393,000,000  94,600,000                                    
          changes in deferred revenue
                          -3,000,000                               -58,200,000    -56,300,000 -76,800,000 60,100,000  -4,500,000 -67,300,000 42,500,000     
          gain on extinguishment of debt
                        22,000,000 66,000,000                -79,200,000 -313,700,000                          
          gain on derivatives
                            -27,100,000     -21,500,000 -5,700,000 26,200,000 -12,900,000 -82,700,000 -40,800,000                                  
          repayments of leased liabilities
                        -24,000,000                                                
          suncoke middletown distributions to noncontrolling interest owners
                           -13,400,000                                             
          adjustments to reconcile net income to net cash used by operating activities:
                                                                        
          net cash used by operating activities
                          -379,000,000        -111,200,000    -142,900,000    -126,500,000   -20,000,000 -228,200,000     -25,400,000                -44,800,000    -120,000,000 
          loss on derivatives
                                                                        
          gain on foreign currency translation
                                                                       
          dividends paid
                           -200,000   -27,000,000 -16,200,000 -14,100,000 -14,800,000                                      
          repurchase of debt
                           -23,500,000   -719,000,000 -10,300,000 -218,200,000 -1,000,000    -566,700,000 -4,400,000  -92,600,000 -133,300,000                          
          decrease in cash and cash equivalents, including cash classified within other current assets related to discontinued operations
                           55,200,000 -18,700,000    20,900,000 -54,600,000 -394,600,000                                      
          less: decrease in cash and cash equivalents from discontinued operations, classified within other current assets
                           -400,000 -1,000,000    -1,200,000 -1,600,000 -1,600,000                                      
          less:
                                                                        
          right-of-use assets - finance leases
                              29,900,000                                          
          grants
                                                                        
          cash paid for capital expenditures including deposits
                              138,100,000                                          
          income tax refunds
                              -60,400,000                                          
          interest paid on debt obligations net of capitalized interest1
                              29,700,000                                          
          fair value of common shares issued for consideration for business combination
                              617,600,000                                          
          fair value of equity awards assumed from ak steel acquisition
                              4,300,000                                          
          dividends declared
                              24,000,000                                          
          deposits for property, plant and equipment
                               -4,200,000 -6,300,000 -5,100,000 -1,400,000 -4,200,000 -11,000,000 -13,300,000 -59,000,000                                  
          acquisition of noncontrolling interest
                                                                        
          distributions of partnership equity
                                      -44,300,000 -7,400,000 -11,100,000 -8,900,000                             
          increase in cash and cash equivalents, including cash classified within other current assets related to discontinued operations
                                                                        
          less: increase in cash and cash equivalents from discontinued operations, classified within other current assets
                                                                        
          cost of goods sold
                                79,500,000 -354,100,000 -126,100,000                                      
          miscellaneous – net
                                -2,200,000 -2,000,000 -3,600,000  -1,900,000 4,600,000 -8,700,000                                  
          income from continuing operations before income taxes
                                -86,800,000 209,200,000 -25,800,000  -27,300,000                                    
          earnings per common share – basic
                                                                        
          earnings per common share – diluted
                                                                        
          changes in pension and other post-retirement benefits, net of tax
                                100,000 5,700,000  100,000 6,700,000                                  
          changes in foreign currency translation
                                                                        
          changes in derivative financial instruments, net of tax
                                2,500,000 -4,800,000 2,700,000                                      
          total comprehensive income
                                -67,400,000                                        
          change in derivatives
                                                                        
          loss from discontinued operations, net of tax
                                                                        
          proceeds on sales of assets
                                    3,900,000                                    
          loss from continuing operations
                                  -22,100,000    -84,800,000                                  
          net loss
                                  -22,100,000    -84,300,000                                  
          loss per common share – basic
                                                                        
          loss per common share – diluted
                                                                        
          total comprehensive loss
                                  -13,700,000                                      
          adjustments to reconcile net loss to net cash used by operating activities:
                                                                        
          loss on deconsolidation
                                                                        
          repayment under credit facilities
                                          -14,800,000 -295,000,000 -389,500,000 -483,500,000 -190,000,000                       
          repayments of equipment loans
                                                                        
          increase in cash and cash equivalents, including cash classified within current assets of discontinued operations
                                                                        
          less: increase in cash and cash equivalents classified within current assets of discontinued operations
                                   -3,200,000                                     
          freight and venture partners' cost reimbursements
                                    14,800,000 24,000,000 18,300,000                                  
          loss attributable to noncontrolling interest
                                                                        
          income per common share attributable to cliffs shareholders – basic
                                                                        
          income per common share attributable to cliffs shareholders – diluted
                                                                        
          other comprehensive income attributable to the noncontrolling interest
                                                                        
          total comprehensive income attributable to cliffs shareholders
                                    42,400,000                                    
          decrease in cash and cash equivalents, including cash classified within current assets of discontinued operations
                                    80,800,000                                    
          unrealized net gain on derivative financial instruments, net of tax
                                     -100,000 300,000                                  
          other comprehensive loss attributable to the noncontrolling interest
                                                                        
          loss from continuing operations before income taxes
                                      -69,100,000                                  
          net loss attributable to cliffs shareholders
                                      -84,300,000                                  
          loss per common share attributable to cliffs shareholders – basic
                                                                        
          loss per common share attributable to cliffs shareholders – diluted
                                                                        
          total comprehensive loss attributable to cliffs shareholders
                                      -76,600,000                                  
          loss on extinguishment/restructuring of debt
                                                                        
          decrease in cash and cash equivalents
                                      -221,100,000  -60,700,000             -119,700,000                   
          includes our employees and the employees of the north american joint ventures.
                                                                        
          william r. calfee
                                                                        
          richard r. mehan
                                                                        
          duncan price
                                                                        
          george w. hawk, jr.
                                                                        
          mine location
                                                                        
          north america
                                                                        
          asia pacific
                                                                        
          pricing in north america reflects us per long tons of pellets fob port, except for empire and tilden, which are fob mine. pricing in asia pacific reflects us per product dry metric ton iron unit.
                                                                        
          estimated standard equivalent pellets, including both proven and probable reserves based on life of mine operating schedules.
                                                                        
          cockatoo island jv
                                                                        
          reported ore reserves restricted to proven and probable tonnages based on life of mine operating schedules. 3.5 million tonnes of the koolyanobbing reserves are sourced from current stockpiles.
                                                                        
          asia pacific iron ore has a 50% interest in the cockatoo island joint venture. reserves reported at 100% and represent the stage 3 seawall extension project area.
                                                                        
          all coal extracted by underground mining using longwall and continuous miner equipment.
                                                                        
          in millions of short tons of 2,000 pounds.
                                                                        
          moranbah coal measures b, c and e seams
                                                                        
          metric tons of 2,205 pounds. in-place coal at 8 percent moisture, recoverable clean coal at 9 percent moisture. reserves listed on 100 percent basis. cliffs natural resources has an effective 45 percent interest in the joint venture.
                                                                        
          all coal is extracted by conventional surface mining techniques.
                                                                        
          in million of metric tons of 2,205 pounds. in-place coal at 8 percent moisture, recoverable clean coal at 9 percent moisture. reserves listed on 100% basis. cliffs natural resources has an effective 45 percent interest in the joint venture.
                                                                        
          sonoma steam coal recoverable reserves meet us compliance standards as defined by phase ii of the clean air act as coal having sulfur dioxide content of 1.2 pounds or less per million btu.
                                                                        
          october 1 — 31, 2009
                                                                        
          november 1 — 30, 2009
                                                                        
          december 1 — 31, 2009
                                                                        
          income before cumulative effect of accounting changes
                                                                        
          cumulative effect of accounting changes
                                                                        
          earnings
                                                                        
          production tonnage - north american iron ore
                                                                        
          sales tonnage - north american iron ore
                                                                        
          common shares outstanding - basic
                                                                        
          royalties and management fee revenue
                                                                        
          terminated acquisition costs
                                                                        
          gain on sale of other assets — net
                                                                        
          casualty recoveries
                                                                        
          impairment of securities
                                                                        
          includes collar options and convertible collar options.
                                                                        
          contracts expiring in the next 25 to 36 months
                                                                        
          includes collar options, convertible collar options and forward exchange contracts.
                                                                        
          cost of goods sold and operating expense
                                                                        
          includes 1.6 million tons allocated to cliffs due to re-nominations by cliffs’ partners at tilden and wabush.
                                                                        
          mine:
                                                                        
          sales tonnes
                                                                        
          tonnes are metric tons (2,205 pounds). cockatoo production reflects our 50 percent share.
                                                                        
          2006
                                                                        
          2007
                                                                        
          2008
                                                                        
          significant transactions
                                                                        
          rail upgrade in asia pacific
                                                                        
          payments for new longwall system at north american coal
                                                                        
          purchase of noncontrolling interest in asia pacific iron ore
                                                                        
          purchase of noncontrolling interest in united taconite
                                                                        
          acquisition termination fees
                                                                        
          other capital expenditures
                                                                        
          sale of assets
                                                                        
          dividend distributions
                                                                        
          sources of financing
                                                                        
          proceeds from sale of common shares
                                                                        
          net borrowings under senior notes
                                                                        
          net borrowings (repayments) under credit facility
                                                                        
          longwall plow system
                                                                        
          fin 48 obligations
                                                                        
          asia pacific iron ore facilities
                                                                        
          revenue per ton/tonne
                                                                        
          cost per ton/tonne
                                                                        
          the impact on product revenue resulting from the difference between the estimated price and the actual price was recorded in the second quarter of each respective year.
                                                                        
          long-term receivables
                                                                        
          deposits and miscellaneous
                                                                        
          derivative liabilities
                                                                        
          3.25% redeemable cumulative convertible perpetual preferred stock — issued 172,500 shares, 205 shares outstanding in 2008
                                                                        
          authorized — 224,000,000 shares;
                                                                        
          issued — 134,623,528 shares (2008 — 134,623,528 shares);
                                                                        
          outstanding — 130,971,470 shares
                                                                        
          cost of 3,652,058 common shares in treasury
                                                                        
          accumulated other comprehensive loss
                                                                        
          less: net income
                                                                        
          cash dividends per share
                                                                        
          foreign exchange gains
                                                                        
          equity loss in ventures
                                                 500,000 67,900,000 5,500,000            3,400,000 9,900,000 20,900,000 25,500,000 9,200,000 8,900,000 13,100,000 6,200,000 6,900,000 
          property damage recoveries
                                                                    -500,000   
          purchase of pinnoak
                                                                        
          purchase of noncontrolling interests
                                                                        
          proceeds from property damage insurance recoveries
                                                                    500,000   
          borrowings under credit facility
                                                               1,300,000 4,200,000 124,200,000 150,000,000     
          repayments under credit facility
                                                               -200,000 -100,000 -126,100,000 -150,000,000     
          repayment of pinnoak debt
                                                                        
          borrowings under senior notes
                                                                      
          contributions by (to) joint ventures
                                                                    -11,400,000    
          january 1, 2007
                                                                        
          unrealized loss on interest rate swap
                                                                        
          effect of implementing provisions of asc 740 related to accounting for income tax uncertainties
                                                                        
          undistributed earnings to noncontrolling interest
                                                                        
          stock options exercised
                                                                        
          repurchases of common stock
                                                                        
          december 31, 2007
                                                                        
          equity purchase of noncontrolling interest
                                                                        
          pinnoak settlement
                                                                        
          december 31, 2008
                                                                        
          unrealized loss on derivative instruments
                                                                        
          north american iron ore
                                                                        
          assets :
                                                                        
          long-lived assets
                                                                        
          total long-lived assets
                                                                        
          interest rate swap
                                                                        
          benchmark pricing provision
                                                                        
          held to maturity — current
                                                                        
          held to maturity — non-current
                                                                        
          available for sale — non-current
                                                                        
          asset backed securities
                                                                        
          floating rate notes
                                                                        
          asset backed securities:
                                                                        
          within 1 year
                                                                        
          1 to 5 years
                                                                        
          floating rate notes:
                                                                        
          carrying value of net assets acquired
                                                                        
          fair value adjustments:
                                                                        
          land
                                                                        
          mineral reserves
                                                                        
          below market sales contracts
                                                                        
          fair value of net assets acquired
                                                                        
          purchase price
                                                                        
          inventory
                                                                        
          balance sheet information
                                                                        
          non-current assets
                                                                        
          non-current liabilities
                                                                        
          the financial information of amapá is recorded one month in arrears and is presented in accordance with u.s. gaap. the information presented in the table represents 100% of amapá’s results.
                                                                        
          beginning balance—january 1
                                                                        
          transfers in to level 3
                                                                        
          ending balance—december 31
                                                                        
          total gains for the period included in earnings attributable to the change in unrealized gains or losses on assets and liabilities still held at the reporting date
                                                                        
          arcelormittal usa—ispat receivable
                                                                        
          asia pacific rail credit receivable
                                                                        
          private placement senior notes:
                                                                        
          credit facility:
                                                                        
          2015 and thereafter
                                                                        
          reclassification adjustments
                                                                        
          actuarial gain
                                                                        
          prior service (credit) cost
                                                                        
          the estimated amounts that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2010:
                                                                        
          discount rate
                                                                        
          health care cost trend rate assumed for next year
                                                                        
          year that the ultimate rate is reached
                                                                        
          beginning balance—january 1, 2009
                                                                        
          ending balance—december 31, 2009
                                                                        
          2010 (expected)*
                                                                        
          2015-2019
                                                                        
          grant date market price
                                                                        
          12.96 - 25.31
                                                                        
          vested or expected to vest at
                                                                        
          tax effect of foreign operations
                                                                        
          as of december 31, 2007:
                                                                        
          as of december 31, 2008:
                                                                        
          balance december 31, 2006
                                                                        
          change during 2007
                                                                        
          balance december 31, 2007
                                                                        
          change during 2008
                                                                        
          income from continuing operations attributable to cliffs shareholders
                                                                        
          preferred dividends
                                                                        
          income from continuing operations attributable to cliffs common shareholders
                                                                        
          income attributable to cliffs common shareholders — basic
                                                                        
          dilutive effect preferred dividend
                                                                        
          income attributable to cliffs common shareholders plus assumed conversions — diluted
                                                                        
          convertible preferred stock
                                                                        
          income attributable to cliffs before extraordinary gain and cumulative effect of accounting change
                                                                        
          earnings per common share attributable to cliffs shareholders:
                                                                        
          includes 823,393 performance share awards for which issuance is dependent upon meeting certain performance targets, and 323,021 restricted awards for which issuance is based upon a three-year vesting period.
                                                                        
          the mpi plan, the mine plan, and the vnqdc plan provide for the issuance of common shares, but do not provide for a specific amount available under the plans. descriptions of those plans are set forth below.
                                                                        
          item 14. principal
                                                                        
          item 15. exhibits,
                                                                        
          * r. c. cambre
                                                                        
          * j. d. ireland, iii
                                                                        
          2
                                                                        
          3
                                                                        
          #
                                                                        
          4
                                                                        
          10
                                                                        
          31
                                                                        
          32
                                                                        
          level
                                                                        
          i
                                                                        
          ii
                                                                        
          iii
                                                                        
          iv
                                                                        
          v
                                                                        
          “borrower”
                                                                        
          name: laurie brlas title: executive vice president and chief financial officer
                                                                        
          “administrative agent”
                                                                        
          bank of america, n.a., as administrative agent
                                                                        
          name: george s. carey title: assistant vice president
                                                                        
          bank of america, n.a., as a lender, swing line lender and as l/c issuer
                                                                        
          name: kenneth g. wood title: senior vice president
                                                                        
          jpmorgan chase bank, n.a., as a lender
                                                                        
          name: barry a. boderschatz title: assistant vice president
                                                                        
          rbs citizens, n.a., as a lender
                                                                        
          name: debra l. mcallonis title: senior vice president
                                                                        
          keybank national association, as documentation agent and a lender
                                                                        
          name: suzannah harris title: vice president
                                                                        
          fifth third bank, as a lender
                                                                        
          name: roy c. lanctot title: vice president
                                                                        
          commonwealth bank of australia, as a lender
                                                                        
          name:
                                                                        
          title:
                                                                        
          pnc bank, national association, as a lender
                                                                        
          us bank, n.a., as a lender
                                                                        
          bmo capital markets, financing inc., as a lender
                                                                        
          national australia bank limited a.b.n. 12 004 044 937, as a lender
                                                                        
          national city bank, as a lender
                                                                        
          comerica bank, as a lender
                                                                        
          “guarantors” the cleveland-cliffs iron company
                                                                        
          cliffs mining company clf pinnoak llc
                                                                        
          northshore mining company silver bay power company cliffs minnesota mining company cliffs empire, inc. cliffs tiop, inc. cliffs north american coal llc (f/k/a pinnoak resources, llc) cliffs sales company
                                                                        
          (gain) loss on extinguishment/restructuring of debt
                                        88,600,000                                
          (gain) loss on deconsolidation
                                        -32,300,000                                
          repayment of equipment loans
                                          -72,900,000                              
          impairment of goodwill and other long-lived assets
                                                                       
          gain on extinguishment/restructuring of debt
                                         -148,000,000 -178,800,000                              
          loss on deconsolidation, net of cash deconsolidated
                                         20,700,000  13,500,000 13,400,000 -134,700,000 776,100,000                          
          loss on sale of north american coal mines
                                                                        
          investments in dip and pre-petition financing
                                                                        
          proceeds from dip and pre-petition financing
                                                                        
          proceeds (uses) from sale of north american coal mines
                                                                        
          net cash from investing activities
                                                                        
          proceeds from first lien notes offering
                                           503,500,000                          
          contributions (to)/by joint ventures
                                                                        
          miscellaneous - net
                                                                        
          equity loss from ventures, net of tax
                                                                        
          net income attributable to cliffs common shareholders
                                                                        
          earnings per common share attributable to cliffs shareholders - basic
                                                                        
          earnings per common share attributable to cliffs shareholders - diluted
                                                                        
          cash dividends declared per depositary share
                                                                        
          unrealized net gain on marketable securities, net of tax
                                                                        
          impairment of other long-lived assets
                                                                        
          (gain) loss on deconsolidation, net of cash deconsolidated
                                          -3,800,000                              
          payables, accrued expenses and other current liabilities
                                          -86,800,000                              
          investments in dip and prepetition financing
                                                                        
          net proceeds from issuance of series a, mandatory convertible preferred stock, class a
                                                709,400,000                     
          proceeds from equipment loans
                                                                        
          proceeds from sale of sonoma
                                                                        
          repayment of senior notes
                                                                        
          contributions by joint ventures
                                                5,600,000 4,700,000 1,700,000 11,300,000 26,600,000   30,000,000            3,300,000     
          proceeds from equipment loan
                                                                        
          equity income
                                                                        
          settlements in canadian dollar foreign exchange contracts
                                                                        
          less: other comprehensive loss attributable to the noncontrolling interest
                                                                        
          taxes payable
                                                                        
          current portion of debt
                                                                        
          cliffs shareholders' equity
                                                                        
          common shares - par value 0.125 per share
                                                                        
          authorized - 400,000,000 shares (2011 - 400,000,000);
                                                                        
          issued - 149,195,469 shares (2011 - 149,195,469 shares);
                                                                        
          outstanding - 142,488,633 shares
                                                                        
          cost of 6,706,836 common shares in treasury
                                                                        
          total cliffs shareholders' equity
                                                                        
          cost of canadian dollar foreign exchange option
                                                          -22,300,000             
          cash flow from operations
                                                                        
          operating activities:
                                                                        
          settlements on canadian dollar foreign exchange contracts
                                                           28,100,000             
          issuance costs of bridge credit facility
                                                           -31,800,000             
          foreign exchange gain
                                                                 -10,500,000       
          investments in marketable securities
                                                             1,500,000           
          purchase of noncontrolling interest in portman
                                                                        
          gain on sale of assets
                                                                  -1,800,000 2,100,000   -13,800,000 -500,000 
          excess tax benefit from share-based compensation
                                                                  -300,000 -3,100,000 -200,000 -100,000 -3,200,000 
          additional investment in amapá
                                                                  -19,600,000 -18,300,000     
          net cash from (used by) financing activities
                                                                   -6,500,000     
          cash flow from continuing operations operating activities
                                                                        
          minority interest
                                                                    -7,900,000 3,600,000 22,400,000 3,100,000 
          proceeds from casualty recoveries
                                                                        
          deferred revenue and below-market sales contracts
                                                                        
          sales of marketable securities
                                                                        
          purchases of marketable securities
                                                                        
          purchase of minority interest in portman
                                                                    -347,300,000   
          purchase of minority interest in united taconite
                                                                       
          issuance costs of revolving credit
                                                                        
          proceeds from stock options exercised
                                                                        
          cash from (used by) continuing operations
                                                                        
          cash from discontinued operations — operating
                                                                        
          tax contingency reserve
                                                                     -4,300,000   
          derivatives and currency hedging
                                                                     40,100,000 -55,800,000 -10,300,000 
          (gain) loss on sale of assets
                                                                        
          environmental and closure obligations
                                                                     1,400,000 100,000 -400,000 
          receivables and all other assets
                                                                     32,100,000 -106,400,000 -2,000,000 
          investing activities:
                                                                        
          financing activities:
                                                                        
          borrowings under term loans
                                                                        
          contributions by minority interest
                                                                      1,400,000 400,000 
          depreciation and amortization
                                                                       38,100,000 
          purchase of marketable securities
                                                                        
          repayment of capital lease obligations