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SunCoke Energy, Inc
(NYSE:SXC) 

SXC stock logo

SunCoke Energy, Inc. operates as an independent producer of coke in the Americas and Brazil. The company operates through three segments: Domestic Coke, Brazil Coke, and Logistics. It offers metallurgical and thermal coal. The company also provides handling and/or mixing services to steel, coke, ele...

Founded: 1960
Full Time Employees: 1,171
Sector: Basic Materials
Industry: Coking Coal
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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 2021-12-31 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 2015-12-31 2015-09-30 2015-03-31 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 
                                                           
      revenues
    		                                                       
      sales and other operating revenue
    		455,100,000 480,200,000 487,000,000 434,100,000 436,000,000 486,000,000 490,100,000 470,900,000 488,400,000 520,600,000 520,400,000 534,400,000 487,800,000 514,000,000 516,800,000 501,900,000 439,800,000 365,300,000 366,500,000 364,300,000 359,900,000 310,100,000 302,200,000 338,000,000 382,700,000 397,200,000 404,300,000 407,500,000 391,300,000 368,900,000 364,500,000 367,000,000 350,500,000 359,600,000 339,000,000 323,200,000 309,700,000 325,400,000 293,700,000 292,600,000 343,600,000 336,200,000 320,300,000 371,700,000 358,000,000 388,500,000 389,900,000 403,600,000 480,600,000 480,100,000 460,700,000 480,600,000 413,876,000 403,100,000 377,657,000 
      costs and operating expenses
    		                                                       
      cost of products sold and operating expenses
    		375,500,000 407,700,000 407,900,000 375,100,000 362,300,000 406,300,000 405,200,000 389,700,000 402,200,000 443,400,000 436,100,000 443,100,000 402,000,000 441,700,000 413,400,000 411,800,000 338,000,000 288,900,000 277,300,000 278,600,000 274,000,000 243,000,000 238,300,000 262,500,000 304,400,000 323,800,000 319,400,000 327,000,000 307,400,000 287,900,000 283,300,000 282,700,000 270,600,000 272,000,000 257,200,000 257,200,000 234,400,000 224,000,000 217,600,000 224,400,000   254,500,000 290,000,000 304,000,000 316,700,000 316,500,000 332,400,000 403,000,000 388,900,000 377,400,000 408,300,000 372,534,000 332,723,000 319,214,000 
      selling, general and administrative expenses
    		30,300,000 21,200,000 28,300,000 20,600,000 14,700,000 15,400,000 9,600,000 17,800,000 18,400,000 15,400,000 19,100,000 17,400,000 18,800,000 13,500,000 20,100,000 19,800,000 18,000,000 13,500,000 15,300,000 17,700,000 15,300,000 30,300,000 18,400,000 16,500,000 16,200,000 22,900,000 14,300,000 21,900,000 16,700,000 16,900,000 15,700,000 17,600,000 15,900,000 18,100,000 17,700,000 24,100,000 19,700,000 22,500,000 21,800,000 23,700,000   14,500,000 21,900,000 21,900,000 26,500,000 23,500,000 21,800,000 20,800,000 20,000,000 20,500,000 20,700,000 23,897,000 25,939,000 22,704,000 
      depreciation and amortization expense
    		44,900,000 58,800,000 37,400,000 28,600,000 28,800,000 28,800,000 28,100,000 28,700,000 33,300,000 35,600,000 35,500,000 36,400,000 35,300,000 35,800,000 35,700,000 35,800,000 35,200,000 34,900,000 32,500,000 34,100,000 32,400,000 32,000,000 33,500,000 34,100,000 34,100,000 34,000,000 35,600,000 37,000,000 37,200,000 41,300,000 35,400,000 32,000,000 32,900,000 31,000,000 30,600,000 33,300,000 33,300,000 31,800,000 25,600,000 28,600,000   23,800,000             
      total costs and operating expenses
    		450,700,000 578,000,000 473,600,000 424,300,000 405,800,000 450,500,000 442,900,000 436,200,000 453,900,000 494,400,000 490,700,000 496,900,000 456,100,000 491,000,000 469,200,000 467,400,000 391,200,000 337,300,000 325,100,000 330,400,000 321,700,000 305,300,000 290,200,000 313,100,000 354,700,000 380,700,000 616,700,000 385,900,000 361,300,000 346,100,000 334,400,000 332,300,000 319,400,000 321,100,000 305,500,000 314,600,000 287,400,000 278,300,000 265,000,000 281,800,000 328,800,000 313,800,000 292,800,000 443,600,000 354,900,000 368,700,000 363,200,000 377,600,000 447,100,000 427,800,000 418,100,000 447,400,000 412,410,000 373,414,000 356,523,000 
      operating income
    		4,400,000 -97,800,000 13,400,000 9,800,000 30,200,000 35,500,000 47,200,000 34,700,000 34,500,000 26,200,000 29,700,000 37,500,000 31,700,000 23,000,000 47,600,000 34,500,000 48,600,000 28,000,000 41,400,000 33,900,000 38,200,000 4,800,000 12,000,000 24,900,000 28,000,000   21,600,000 30,000,000 22,800,000 30,100,000 34,700,000 31,100,000 38,500,000 33,500,000 8,600,000 22,300,000 47,300,000 28,900,000 10,900,000 24,800,000 23,100,000 27,600,000 -71,400,000 4,700,000 30,900,000 27,300,000 26,100,000 44,300,000 52,700,000 42,800,000 33,900,000 11,715,000 30,085,000 21,435,000 
      yoy
    		-85.43% -375.49% -71.61% -71.76% -12.46% 35.50% 58.92% -7.47% 8.83% 13.91% -37.61% 8.70% -34.77% -17.86% 14.98% 1.77% 27.23% 483.33% 245.00% 36.14% 36.43%   15.28% -6.67%   -37.75% -3.54% -40.78% -10.15% 303.49% 39.46% -18.60% 15.92% -21.10% -10.08% 104.76% 4.71% -115.27% 427.66% -25.24% 1.10% -373.56% -89.39% -41.37% -36.21% -23.01% 278.15% 75.17% 99.67%     
      qoq
    		-104.50% -829.85% 36.73% -67.55% -14.93% -24.79% 36.02% 0.58% 31.68% -11.78% -20.80% 18.30% 37.83% -51.68% 37.97% -29.01% 73.57% -32.37% 22.12% -11.26% 695.83% -60.00% -51.81% -11.07%    -28.00% 31.58% -24.25% -13.26% 11.58% -19.22% 14.93% 289.53% -61.43% -52.85% 63.67% 165.14% -56.05% 7.36% -16.30% -138.66% -1619.15% -84.79% 13.19% 4.60% -41.08% -15.94% 23.13% 26.25% 189.37% -61.06% 40.35%  
      operating margin %
    		Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 14.53% 9.83% 3.72% 7.01% 6.86% 8.61% -19.18% 1.31% 7.73% 6.99% 6.47% 9.02% 10.97% 9.29% 7.04% 2.76% 7.46% 5.67% 
      interest expense
    		8,700,000 9,400,000 8,400,000 5,400,000 5,200,000 5,600,000 5,700,000 5,800,000 6,300,000 6,300,000 6,600,000 7,200,000 7,200,000 7,700,000 8,000,000 8,300,000 8,000,000 7,700,000 7,900,000 14,200,000 12,700,000 13,100,000 13,700,000 14,900,000 14,600,000 14,700,000 15,700,000 15,100,000 14,800,000 14,500,000 15,400,000 15,700,000 15,800,000 15,600,000 16,100,000 15,200,000 13,700,000 13,200,000 12,900,000 13,400,000 5,800,000 14,600,000 23,300,000 27,100,000 12,100,000 10,000,000 12,100,000 12,100,000        
      income before income tax expense
    		-4,300,000 -107,200,000 5,000,000 4,400,000 25,000,000 29,900,000 41,500,000 28,900,000 28,200,000 19,900,000 23,100,000 30,300,000 24,500,000 15,300,000 39,600,000 26,200,000 40,600,000 20,300,000 33,500,000 -12,200,000 25,500,000 6,275,000 -1,200,000 10,000,000 16,300,000 -51,225,000 -226,600,000 6,500,000 15,200,000 12,175,000 14,700,000 19,000,000 15,000,000 -250,000 17,300,000 -26,800,000 8,500,000            32,500,000 40,500,000 31,000,000 21,900,000 4,627,000 26,805,000 25,874,000 
      income tax expense
    		-900,000 -21,700,000 -18,800,000 900,000 5,600,000 4,100,000 8,200,000 5,600,000 7,100,000 4,600,000 14,600,000 8,300,000 6,800,000 2,500,000 -2,900,000 7,200,000 10,000,000 6,300,000 9,400,000 -4,700,000 7,300,000 -2,500,000 200,000 2,200,000 10,400,000 2,600,000 -63,500,000 3,200,000 3,000,000 2,800,000 -2,400,000 2,200,000 2,000,000 -151,000,000 -1,500,000 4,700,000 66,200,000 1,475,000 2,600,000       200,000 600,000 1,100,000 3,500,000 7,600,000 7,000,000 5,300,000 -2,893,000 5,073,000 1,881,000 
      net income
    		-3,400,000 -85,500,000 23,800,000 3,500,000 19,400,000 25,800,000 33,300,000 23,300,000 21,100,000 15,300,000 8,500,000 22,000,000 17,700,000 12,800,000 42,500,000 19,000,000 30,600,000 14,000,000 24,100,000 -7,500,000 18,200,000 -3,500,000 -1,400,000 7,800,000 5,900,000 -800,000 -163,100,000 3,300,000 12,200,000 5,500,000 17,100,000 11,400,000 13,000,000 173,900,000 18,800,000 -31,500,000 -57,700,000 31,500,000 14,400,000 1,000,000 32,900,000 -16,500,000 400,000 -48,600,000 -3,800,000 18,700,000 12,300,000 12,700,000 29,000,000 32,900,000 24,000,000 16,600,000 7,520,000 21,732,000 23,993,000 
      yoy
    		-117.53% -431.40% -28.53% -84.98% -8.06% 68.63% 291.76% 5.91% 19.21% 19.53% -80.00% 15.79% -42.16% -8.57% 76.35% -353.33% 68.13% -500.00% -1821.43% -196.15% 208.47% 337.50% -99.14% 136.36% -51.64% -114.55% -1053.80% -71.05% -6.15% -96.84% -9.04% -136.19% -122.53% 452.06% 30.56% -3250.00% -275.38% -290.91% 3500.00% -102.06% -965.79% -188.24% -96.75% -482.68% -113.10% -43.16% -48.75% -23.49% 285.64% 51.39% 0.03%     
      qoq
    		-96.02% -459.24% 580.00% -81.96% -24.81% -22.52% 42.92% 10.43% 37.91% 80.00% -61.36% 24.29% 38.28% -69.88% 123.68% -37.91% 118.57% -41.91% -421.33% -141.21% -620.00% 150.00% -117.95% 32.20% -837.50% -99.51% -5042.42% -72.95% 121.82% -67.84% 50.00% -12.31% -92.52% 825.00% -159.68% -45.41% -283.17% 118.75% 1340.00% -96.96% -299.39% -4225.00% -100.82% 1178.95% -120.32% 52.03% -3.15% -56.21% -11.85% 37.08% 44.58% 120.74% -65.40% -9.42%  
      net income margin %
    		-Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% -Infinity% -Infinity% Infinity% Infinity% -Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% -Infinity% 9.67% 4.90% 0.34% 9.30% -4.90% 0.12% -13.06% -1.06% 4.68% 3.15% 3.15% 5.90% 6.85% 5.21% 3.45% 1.77% 5.39% 6.35% 
      less: net income attributable to noncontrolling interests
    		1,000,000 100,000 1,600,000 1,600,000 2,100,000 2,100,000 2,600,000 1,800,000 1,100,000 1,500,000 1,500,000 1,600,000 1,400,000 1,000,000 1,100,000 1,000,000 1,100,000 1,300,000 1,100,000 1,300,000 1,700,000 1,500,000 1,300,000 1,300,000 1,000,000 600,000 -100,000 1,000,000 2,400,000 3,700,000 5,600,000 7,200,000 4,300,000 39,900,000 7,200,000 -7,300,000 -58,700,000 14,500,000 8,300,000 5,600,000 13,900,000 7,000,000 4,400,000 600,000 4,000,000 7,700,000 6,100,000 7,000,000 1,400,000 1,300,000  -300,000    
      net income attributable to suncoke energy, inc.
    		-4,400,000 -85,600,000 22,200,000 1,900,000 17,300,000 23,700,000 30,700,000 21,500,000 20,000,000 13,800,000 7,000,000 20,400,000 16,300,000 11,800,000 41,400,000 18,000,000 29,500,000 12,700,000 23,000,000 -8,800,000 16,500,000 -5,000,000 -2,700,000 6,500,000 4,900,000 -1,400,000 -163,000,000 2,300,000 9,800,000 1,800,000 11,500,000 4,200,000 8,700,000 134,000,000 11,600,000  1,000,000 17,000,000 6,100,000 -4,600,000 19,000,000 -23,500,000 -4,000,000 -49,200,000 -7,800,000 3,500,000 6,200,000 5,700,000        
      earnings attributable to suncoke energy, inc. per common share:
    		                                                       
      basic
    		-50,000 -1,000,000 260,000 20,000 200,000 280,000 360,000 250,000 240,000 160,000 80,000 240,000 190,000 140,000 490,000 210,000 350,000 150,000 280,000 -110,000 200,000 -60,000 -30,000 80,000 60,000 70,000 -1,810,000 30,000 150,000 20,000 180,000 60,000 130,000 2,080,000 180,000  20,000 260,000 100,000     -710,000 -110,000 160,000 90,000 80,000 390,000 450,000 320,000 240,000    
      diluted
    		-50,000 -1,000,000 260,000 20,000 200,000 270,000 360,000 250,000 230,000 170,000 80,000 240,000 190,000 140,000 490,000 210,000 350,000 150,000 270,000 -110,000 200,000 -60,000 -30,000 80,000 60,000 70,000 -1,810,000 30,000 150,000 30,000 180,000 60,000 130,000 2,060,000 180,000  20,000 260,000 100,000     -710,000 -110,000 160,000 90,000 80,000 390,000 450,000 320,000 240,000    
      weighted-average number of common shares outstanding:
    		                                                       
      basic
    		85,600,000 85,500,000 85,600,000 85,500,000 85,500,000 85,100,000 85,100,000 85,100,000 85,000,000 84,700,000 84,800,000 84,700,000 84,500,000 83,800,000 83,900,000 83,900,000 83,200,000 83,000,000 83,000,000 83,000,000 82,800,000 83,000,000 82,800,000 82,800,000 83,700,000 76,800,000 89,900,000 65,900,000 64,900,000 64,700,000 64,700,000 64,700,000 64,600,000 64,300,000 64,300,000 64,300,000 64,300,000 64,200,000 64,200,000 64,200,000 65,000,000 64,500,000 66,200,000 69,500,000 69,700,000 69,900,000 69,800,000 70,000,000 70,000,000 70,000,000 70,000,000 70,100,000 70,000,000 70,000,000  
      diluted
    		85,600,000 85,500,000 85,700,000 85,600,000 85,600,000 85,300,000 85,300,000 85,300,000 85,300,000 84,900,000 85,100,000 84,900,000 84,900,000 84,600,000 84,700,000 84,600,000 84,200,000 83,700,000 83,800,000 83,000,000 83,500,000 83,200,000 82,800,000 82,900,000 83,900,000 76,800,000 89,900,000 66,100,000 65,300,000 65,500,000 65,500,000 65,600,000 65,400,000 65,200,000 65,200,000 64,300,000 65,100,000 64,400,000 64,500,000 64,200,000 65,000,000 64,500,000 66,200,000 69,500,000 69,700,000 70,200,000 70,000,000 70,200,000 70,300,000 70,300,000 70,300,000 70,300,000 70,000,000 70,000,000  
      loss on extinguishment of debt
    		                   31,900,000       -1,500,000      300,000  100,000 20,200,000 100,000                   
      gain on extinguishment of debt
    		                     -850,000 -500,000  -2,900,000                               
      long-lived asset and goodwill impairment
    		                          247,400,000                             
      operating (loss) income
    		                         16,500,000 -212,400,000                             
      loss from equity method investment
    		                               5,400,000                        
      loss on divestiture of business
    		                                     3,675,000  5,100,000                
      net loss attributable to suncoke energy, inc.
    		                                   -24,200,000                    
      loss attributable to suncoke energy, inc. per common share:
    		                                                       
      basic
    		                                   -380,000    -70,000 -157,500 -360,000              
      diluted
    		                                   -380,000    -70,000 -157,500 -360,000              
      asset impairment
    		                                                       
      other income
    		                                     200,000 200,000 100,000 10,000,000 700,000 100,000 500,000 1,600,000 11,100,000 600,000 100,000 10,800,000 400,000 200,000 700,000 10,249,000 399,000 301,000 
      total revenues
    		                                     325,600,000 293,900,000 292,700,000 353,600,000 336,900,000 320,400,000 372,200,000 359,600,000 399,600,000 390,500,000 403,700,000 491,400,000 480,500,000 460,900,000 481,300,000 424,125,000 403,499,000 377,958,000 
      yoy
    		                                     -3.35% -8.27% -21.36% -1.67% -15.69% -17.95% -7.80% -26.82% -16.84% -15.27% -16.12% 15.86% 19.08% 21.94%     
      qoq
    		                                     10.79% 0.41% -17.22% 4.96% 5.15% -13.92% 3.50% -10.01% 2.33% -3.27% -17.85% 2.27% 4.25% -4.24% 13.48% 5.11% 6.76%  
      (gain) loss on extinguishment of debt
    		                                     -100,000 -1,000,000 -3,500,000                
      income before income tax expense and income from equity method investment
    		                                     8,475,000 17,000,000 1,000,000      10,100,000 15,200,000 14,000,000        
      income from equity method investment
    		                                        5,400,000 20,200,000 700,000 900,000 600,000 625,000 2,300,000 200,000        
      income tax (benefit) expense
    		                                           -50,800,000 -4,200,000           
      cost of products sold and operating expense
    		                                        206,100,000 266,300,000              
      selling, general and administrative expense
    		                                        13,475,000 21,900,000              
      depreciation, depletion and amortization expense
    		                                        18,950,000 25,600,000              
      income before income tax benefit and income from equity method investment
    		                                        1,025,000 8,500,000 4,300,000             
      income tax benefit
    		                                        1,275,000 4,800,000 1,200,000             
      income from continuing operations
    		                                          2,400,000             
      income from discontinued operations, net of income tax benefit of 0.1 million and 3.0 million, for the three months ended march 31, 2015 and 2014, respectively
    		                                          -2,000,000             
      loss attributable to suncoke energy, inc. per common share:
    		                                                       
      basic:
    		                                                       
      continuing operations
    		                                          -30,000             
      discontinued operations
    		                                          -30,000             
      diluted:
    		                                                       
      depreciation, depletion and amortization
    		                                           28,600,000 29,000,000 25,500,000 23,200,000 23,400,000 14,375,000 18,900,000 20,200,000  10,594,250 14,752,000 14,605,000 
      asset and goodwill impairment
    		                                           103,100,000            
      income before income tax (benefit) expense and income from equity method investment
    		                                           -98,500,000 -7,400,000           
      weighted-average common shares outstanding:
    		                                                       
      basic
    		85,600,000 85,500,000 85,600,000 85,500,000 85,500,000 85,100,000 85,100,000 85,100,000 85,000,000 84,700,000 84,800,000 84,700,000 84,500,000 83,800,000 83,900,000 83,900,000 83,200,000 83,000,000 83,000,000 83,000,000 82,800,000 83,000,000 82,800,000 82,800,000 83,700,000 76,800,000 89,900,000 65,900,000 64,900,000 64,700,000 64,700,000 64,700,000 64,600,000 64,300,000 64,300,000 64,300,000 64,300,000 64,200,000 64,200,000 64,200,000 65,000,000 64,500,000 66,200,000 69,500,000 69,700,000 69,900,000 69,800,000 70,000,000 70,000,000 70,000,000 70,000,000 70,100,000 70,000,000 70,000,000  
      diluted
    		85,600,000 85,500,000 85,700,000 85,600,000 85,600,000 85,300,000 85,300,000 85,300,000 85,300,000 84,900,000 85,100,000 84,900,000 84,900,000 84,600,000 84,700,000 84,600,000 84,200,000 83,700,000 83,800,000 83,000,000 83,500,000 83,200,000 82,800,000 82,900,000 83,900,000 76,800,000 89,900,000 66,100,000 65,300,000 65,500,000 65,500,000 65,600,000 65,400,000 65,200,000 65,200,000 64,300,000 65,100,000 64,400,000 64,500,000 64,200,000 65,000,000 64,500,000 66,200,000 69,500,000 69,700,000 70,200,000 70,000,000 70,200,000 70,300,000 70,300,000 70,300,000 70,300,000 70,000,000 70,000,000  
      loss on firm purchase commitments
    		                                                    -44,000   
      interest income—affiliate
    		                                                    15,000 1,123,000 5,680,000 
      interest income
    		                                                 100,000 200,000 100,000 116,000 166,000 83,000 
      interest cost—affiliate
    		                                                    65,000 -342,000 -1,723,000 
      interest cost
    		                                                -11,800,000 -12,300,000 -12,000,000 -12,100,000 -11,740,000 -8,860,000  
      capitalized interest
    		                                                    4,456,000 4,633,000 399,000 
      total financing income
    		                                                -11,800,000 -12,200,000 -11,800,000 -12,000,000 -7,088,000 -3,280,000 4,439,000 
      net income attributable to suncoke energy, inc. / net parent investment
    		                                                27,600,000 31,600,000 22,700,000 16,900,000 7,994,000 18,360,000  
      earnings attributable to suncoke energy, inc. / net parent investment per common share:
    		                                                       
      basic
    		-50,000 -1,000,000 260,000 20,000 200,000 280,000 360,000 250,000 240,000 160,000 80,000 240,000 190,000 140,000 490,000 210,000 350,000 150,000 280,000 -110,000 200,000 -60,000 -30,000 80,000 60,000 70,000 -1,810,000 30,000 150,000 20,000 180,000 60,000 130,000 2,080,000 180,000  20,000 260,000 100,000     -710,000 -110,000 160,000 90,000 80,000 390,000 450,000 320,000 240,000    
      diluted
    		-50,000 -1,000,000 260,000 20,000 200,000 270,000 360,000 250,000 230,000 170,000 80,000 240,000 190,000 140,000 490,000 210,000 350,000 150,000 270,000 -110,000 200,000 -60,000 -30,000 80,000 60,000 70,000 -1,810,000 30,000 150,000 30,000 180,000 60,000 130,000 2,060,000 180,000  20,000 260,000 100,000     -710,000 -110,000 160,000 90,000 80,000 390,000 450,000 320,000 240,000    
      less: net income income attributable to noncontrolling interests
    		                                                  1,300,000  -306,500 3,372,000 1,573,000 
      depreciation, depletion, and amortization
    		                                                   18,400,000    
      earnings per common share
    		                                                       
      basic
    		                                                    187.5 260  
      diluted
    		                                                    187.5 260  
      weighted-average common shares outstanding
    		                                                       
      basic
    		85,600,000 85,500,000 85,600,000 85,500,000 85,500,000 85,100,000 85,100,000 85,100,000 85,000,000 84,700,000 84,800,000 84,700,000 84,500,000 83,800,000 83,900,000 83,900,000 83,200,000 83,000,000 83,000,000 83,000,000 82,800,000 83,000,000 82,800,000 82,800,000 83,700,000 76,800,000 89,900,000 65,900,000 64,900,000 64,700,000 64,700,000 64,700,000 64,600,000 64,300,000 64,300,000 64,300,000 64,300,000 64,200,000 64,200,000 64,200,000 65,000,000 64,500,000 66,200,000 69,500,000 69,700,000 69,900,000 69,800,000 70,000,000 70,000,000 70,000,000 70,000,000 70,100,000 70,000,000 70,000,000  
      diluted
    		85,600,000 85,500,000 85,700,000 85,600,000 85,600,000 85,300,000 85,300,000 85,300,000 85,300,000 84,900,000 85,100,000 84,900,000 84,900,000 84,600,000 84,700,000 84,600,000 84,200,000 83,700,000 83,800,000 83,000,000 83,500,000 83,200,000 82,800,000 82,900,000 83,900,000 76,800,000 89,900,000 66,100,000 65,300,000 65,500,000 65,500,000 65,600,000 65,400,000 65,200,000 65,200,000 64,300,000 65,100,000 64,400,000 64,500,000 64,200,000 65,000,000 64,500,000 66,200,000 69,500,000 69,700,000 70,200,000 70,000,000 70,200,000 70,300,000 70,300,000 70,300,000 70,300,000 70,000,000 70,000,000  
      net income attributable to net parent investment
    		                                                      22,420,000 
    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 2021-12-31 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 2015-12-31 2015-03-31 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 
                                                          
        assets
      		                                                    
        cash and cash equivalents
      		104,400,000 88,700,000 80,400,000 186,200,000 193,700,000 189,600,000 164,700,000 81,900,000 120,100,000 140,100,000 125,900,000 78,200,000 83,300,000 90,000,000 59,300,000 63,400,000 79,700,000 63,800,000 54,600,000 51,700,000 54,000,000 48,400,000 86,000,000 81,100,000 235,800,000 97,100,000 93,700,000 102,200,000 143,900,000 145,700,000 168,400,000 143,000,000 147,000,000 120,200,000 148,700,000 136,700,000 157,200,000 134,000,000 105,300,000 108,000,000 123,400,000 165,400,000 204,400,000 178,200,000 233,600,000 268,800,000 239,200,000 157,800,000 190,000,000 113,600,000 127,500,000 110,850,000 
        receivables
      		115,200,000 111,500,000 137,400,000 73,400,000 80,700,000 96,600,000 80,200,000 146,100,000 110,900,000 88,300,000 81,500,000 96,900,000 81,200,000 104,800,000 118,700,000 108,100,000 99,500,000 77,600,000 60,100,000 49,500,000 45,800,000 46,300,000 46,800,000 49,500,000 55,400,000 59,500,000 62,700,000 98,900,000 86,300,000 75,400,000 75,500,000 80,500,000 75,300,000 68,500,000 70,200,000 65,300,000 62,200,000 60,700,000 54,100,000 48,200,000 65,200,000 59,000,000 70,300,000 81,500,000 91,500,000 65,900,000 70,000,000      
        inventories
      		184,500,000 219,900,000 217,700,000 215,300,000 209,700,000 180,800,000 195,900,000 208,300,000 188,200,000 182,600,000 206,800,000 200,400,000 234,800,000 175,200,000 204,900,000 193,100,000 194,100,000 127,000,000 129,300,000 143,800,000 136,100,000 126,600,000 129,700,000 135,200,000 150,100,000 147,000,000 157,000,000 175,700,000 150,700,000 110,400,000 118,000,000 116,400,000 110,100,000 111,000,000 121,700,000 116,400,000 111,100,000 92,500,000 97,800,000 106,400,000 122,100,000 128,500,000 140,400,000 124,800,000 135,300,000 134,500,000 160,100,000 189,200,000 206,500,000 200,800,000 219,700,000 222,436,000 
        income tax receivable
      		17,500,000 24,100,000 26,500,000    5,600,000   1,400,000         500,000 2,800,000 1,700,000 5,500,000 7,400,000 6,100,000 3,800,000 2,200,000 3,100,000 3,200,000  700,000 2,700,000 4,800,000 5,400,000 4,800,000 9,000,000 16,500,000 5,700,000 4,600,000 7,200,000 9,700,000 11,600,000 8,800,000  5,600,000 6,600,000 3,700,000       
        other current assets
      		25,000,000 18,800,000 22,000,000 9,100,000 11,700,000 7,600,000 9,600,000 11,500,000 12,200,000 4,400,000 7,100,000 7,300,000 10,500,000 4,000,000 6,400,000 6,600,000 10,000,000 3,500,000 6,100,000 5,900,000 6,700,000 2,900,000 4,900,000 5,200,000 7,000,000 2,500,000 4,200,000 4,900,000 6,200,000 2,800,000 5,300,000 9,500,000 9,000,000 6,700,000 7,100,000 6,100,000 7,800,000 3,800,000 4,800,000 7,200,000 3,800,000 6,900,000 5,700,000 7,500,000 2,300,000        
        total current assets
      		446,600,000 463,000,000 484,000,000 484,000,000 495,800,000 474,600,000 456,000,000 447,800,000 431,400,000 416,800,000 421,300,000 382,800,000 409,800,000 374,000,000 389,300,000 371,200,000 383,300,000 271,900,000 250,600,000 253,700,000 244,300,000 229,700,000 274,800,000 277,100,000 452,100,000 308,300,000 320,700,000 384,900,000 387,100,000 335,000,000 369,900,000 354,200,000 346,800,000 311,200,000 356,700,000 341,000,000 344,000,000 316,100,000 269,200,000 279,500,000 326,100,000 406,200,000 433,400,000 410,200,000 481,900,000 475,500,000 471,900,000 438,900,000 450,800,000 393,300,000 414,000,000 386,543,000 
        properties, plants and equipment
      		1,167,800,000 1,202,700,000 1,310,300,000 1,107,600,000 1,122,600,000 1,143,600,000 1,147,400,000 1,159,700,000 1,169,400,000 1,191,100,000 1,205,400,000 1,208,400,000 1,207,800,000 1,229,300,000 1,238,900,000 1,253,500,000 1,266,100,000 1,287,900,000 1,288,100,000 1,289,800,000 1,304,900,000 1,328,000,000 1,332,500,000 1,347,600,000 1,370,000,000 1,390,200,000 1,389,500,000 1,454,800,000 1,459,000,000 1,471,100,000 1,488,800,000 1,487,900,000 1,488,200,000 1,501,300,000 1,505,400,000 1,510,900,000 1,523,300,000 1,542,600,000 1,547,500,000 1,558,300,000 1,593,400,000 1,451,800,000 1,499,300,000 1,553,200,000 1,544,100,000 1,451,200,000 1,396,600,000 1,380,400,000 1,379,200,000 1,384,200,000 1,391,800,000 1,353,499,000 
        goodwill
      		53,500,000 55,600,000 67,000,000                       3,400,000 3,400,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 76,900,000 70,500,000 71,100,000     9,400,000 9,400,000 9,400,000 9,400,000 9,400,000 9,400,000 9,388,000 
        intangible assets
      		43,200,000 44,000,000 45,800,000 28,500,000 28,900,000 29,200,000 29,600,000 30,100,000 30,600,000 31,100,000 31,600,000 32,100,000 32,700,000 33,200,000 33,700,000 34,200,000 34,700,000 35,200,000 35,700,000 36,200,000 36,700,000                                
        deferred charges and other assets
      		23,400,000 24,600,000 24,900,000 21,300,000 21,100,000 20,800,000 21,800,000 19,900,000 21,900,000 21,400,000 20,900,000 20,100,000 19,000,000 18,100,000 17,900,000 18,500,000 21,600,000 20,400,000 18,800,000 18,300,000 19,200,000 18,500,000 16,800,000 16,900,000 16,400,000 17,200,000 17,200,000 14,400,000 20,200,000 5,500,000 3,000,000 3,000,000 3,000,000 2,800,000 5,200,000 4,500,000 5,300,000 5,800,000 4,800,000 5,800,000 15,500,000 19,700,000 47,400,000 44,500,000 41,900,000 40,900,000 39,600,000 38,100,000 37,100,000 38,000,000 32,400,000 35,396,000 
        total assets
      		1,734,500,000 1,789,900,000 1,932,000,000 1,641,400,000 1,668,400,000 1,668,200,000 1,654,800,000 1,657,500,000 1,653,300,000 1,660,400,000 1,679,200,000 1,643,400,000 1,669,300,000 1,654,600,000 1,679,800,000 1,677,400,000 1,705,700,000 1,615,400,000 1,593,200,000 1,598,000,000 1,605,100,000 1,613,400,000 1,661,800,000 1,678,400,000 1,875,900,000 1,753,800,000 1,766,200,000 2,082,400,000 2,097,300,000 2,045,300,000 2,098,200,000 2,084,300,000 2,080,000,000 2,060,100,000 2,114,900,000 2,106,800,000 2,125,700,000 2,120,900,000 2,121,900,000 2,142,000,000 2,255,500,000 1,962,000,000 2,117,200,000 2,183,500,000 2,243,900,000 2,122,700,000 2,011,000,000 1,960,400,000 1,970,200,000 1,918,900,000 1,941,800,000 1,879,194,000 
        liabilities and equity
      		                                                    
        accounts payable
      		140,700,000 157,300,000 153,500,000 141,900,000 152,700,000 153,200,000 152,000,000 154,000,000 159,600,000 172,100,000 182,300,000 173,900,000 172,700,000 159,300,000 153,000,000 159,400,000 168,100,000 126,000,000 122,100,000 111,700,000 106,200,000 104,100,000 92,700,000 72,900,000 110,000,000 142,400,000 119,800,000 137,200,000 145,700,000 115,000,000 154,900,000 134,800,000 131,100,000 115,500,000 138,100,000 126,400,000 123,600,000 98,600,000 93,100,000 91,700,000 99,900,000 100,200,000 121,800,000 136,300,000 154,300,000 125,800,000 132,900,000 121,000,000 154,600,000 146,700,000 181,900,000 185,184,000 
        accrued liabilities
      		53,500,000 60,800,000 65,300,000 43,200,000 35,600,000 52,600,000 47,100,000 46,500,000 39,600,000 51,700,000 54,900,000 43,700,000 45,600,000 61,400,000 55,000,000 51,600,000 48,900,000 53,000,000 50,600,000 47,100,000 46,000,000 49,800,000 43,900,000 41,700,000 41,900,000 47,000,000 46,100,000 49,900,000 42,300,000 45,600,000 45,700,000 44,400,000 44,300,000 53,200,000 51,100,000 43,600,000 40,900,000 49,800,000 50,000,000 50,300,000 45,800,000 35,300,000 52,300,000 46,800,000 69,500,000 60,900,000 91,200,000 87,700,000 75,000,000 65,100,000 85,700,000 51,996,000 
        interest payable
      		6,100,000 1,400,000 7,500,000  6,100,000  6,100,000  6,100,000  6,100,000  6,100,000  6,200,000  6,100,000  6,700,000 600,000 13,000,000 2,000,000 13,900,000 2,100,000 14,100,000 2,200,000 14,400,000 3,900,000 16,800,000 3,600,000 16,700,000 4,100,000 17,100,000 5,400,000 17,600,000 6,600,000 6,700,000 16,200,000 6,800,000 16,800,000 18,900,000 8,700,000 14,900,000 7,800,000 18,200,000 7,800,000 15,700,000 8,100,000 15,600,000 7,800,000   
        total current liabilities
      		200,300,000 219,500,000 227,900,000 185,100,000 206,300,000 205,800,000 205,200,000 202,000,000 209,800,000 223,800,000 250,900,000 222,500,000 231,800,000 224,000,000 219,900,000 215,600,000 230,200,000 182,200,000 182,500,000 162,500,000 168,200,000 158,900,000 155,600,000 119,700,000 169,000,000 194,800,000 185,300,000 209,600,000 218,000,000 171,100,000 223,800,000 190,300,000 199,900,000 178,400,000 226,000,000 192,300,000 182,900,000 172,000,000 181,100,000 180,200,000 165,700,000 168,300,000 205,300,000 231,900,000 283,000,000 195,300,000 247,000,000 220,100,000 259,900,000 234,900,000 281,500,000 251,773,000 
        long-term debt
      		659,900,000 685,500,000 691,100,000 493,400,000 492,900,000 492,300,000 491,800,000 491,300,000 490,800,000                               887,300,000 997,700,000 699,300,000 652,500,000 647,900,000 648,100,000 648,300,000 720,100,000 720,800,000 721,600,000 722,400,000 723,100,000 694,784,000 
        accrual for black lung benefits
      		11,900,000 11,700,000 12,900,000 12,800,000 12,700,000 12,700,000 13,200,000 54,700,000 53,900,000 53,200,000 54,100,000 53,200,000 52,700,000 52,200,000 60,300,000 59,400,000 58,700,000 57,900,000 62,700,000 61,800,000 60,900,000 60,000,000 52,000,000 51,300,000 51,200,000 50,500,000 46,900,000 46,400,000 45,600,000 44,900,000 45,900,000 45,900,000 45,400,000 44,900,000 45,800,000 46,000,000 45,800,000 45,400,000 44,200,000 45,100,000 44,700,000 43,900,000 32,200,000 32,400,000 32,400,000  34,800,000 33,500,000 33,500,000 33,400,000 33,500,000 27,538,000 
        retirement benefit liabilities
      		7,100,000 7,300,000 7,100,000 7,100,000 7,200,000 7,600,000 14,800,000 15,000,000 15,400,000 15,800,000 15,300,000 15,600,000 15,900,000 16,400,000 20,500,000 20,900,000 21,300,000 21,800,000 23,200,000 23,600,000 24,200,000 24,700,000 23,000,000 23,500,000 24,000,000 24,500,000 23,700,000 24,100,000 24,600,000 25,200,000 26,500,000 27,100,000 27,700,000 28,200,000 27,400,000 27,800,000 28,300,000 29,000,000 29,300,000 30,100,000 31,300,000 32,900,000 34,500,000 35,000,000 34,800,000 40,900,000 42,500,000 47,300,000 51,500,000 51,200,000 50,600,000 45,281,000 
        deferred income taxes
      		196,900,000 190,300,000 215,700,000 194,300,000 194,600,000 196,800,000 198,100,000 189,800,000 190,800,000 190,400,000 188,100,000 178,400,000 175,100,000 172,300,000 170,800,000 178,200,000 174,300,000 169,000,000 165,100,000 159,900,000 162,400,000 159,300,000 163,000,000 162,600,000 158,700,000 147,600,000 146,900,000 212,800,000 254,300,000 254,700,000 253,500,000 257,800,000 257,700,000 257,800,000 417,900,000 428,700,000 418,100,000 352,500,000 353,800,000 352,900,000 349,000,000 18,400,000 12,600,000 12,600,000 12,600,000 2,600,000 2,600,000 800,000 800,000 600,000 600,000 552,000 
        asset retirement obligations
      		18,500,000 18,100,000 18,200,000 17,800,000 17,500,000 17,200,000 14,900,000 14,600,000 14,400,000 14,100,000 13,800,000 13,600,000 13,600,000 13,400,000 12,400,000 12,200,000 11,900,000 11,600,000 12,100,000 11,900,000 11,700,000 11,400,000 14,800,000 14,900,000 14,600,000 14,400,000 13,500,000 13,400,000 13,200,000 14,600,000 14,400,000 14,200,000 14,100,000 14,000,000 14,100,000 13,900,000 13,900,000 13,900,000 13,200,000 13,800,000 22,200,000 15,300,000 18,400,000 18,200,000 17,900,000 16,700,000 13,500,000 14,200,000 14,000,000 13,800,000 12,500,000 12,236,000 
        long-term financing lease liability
      		2,500,000  4,600,000                                                  
        other deferred credits and liabilities
      		27,400,000 28,800,000 28,400,000 23,900,000 22,700,000 24,800,000 25,800,000 23,400,000 25,000,000 27,300,000 25,400,000 24,700,000 23,500,000 24,700,000 23,100,000 22,400,000 22,400,000 27,100,000 26,100,000 24,800,000 23,000,000 24,300,000 24,400,000 22,800,000 21,600,000 23,600,000 23,100,000 25,300,000 25,800,000 17,600,000 16,800,000 16,600,000 15,500,000 16,100,000 16,000,000 20,400,000 18,500,000 19,000,000 20,000,000 16,900,000 22,100,000 16,400,000 16,300,000 20,000,000 18,800,000 17,900,000 16,700,000 21,700,000 19,000,000 20,100,000 19,600,000 19,247,000 
        total liabilities
      		1,124,500,000 1,163,800,000 1,205,900,000 934,400,000 953,900,000 957,200,000 963,800,000 990,800,000 1,000,100,000 1,014,900,000 1,037,400,000 1,001,000,000 1,041,000,000 1,031,900,000 1,068,200,000 1,103,300,000 1,143,800,000 1,080,000,000 1,069,500,000 1,094,700,000 1,092,000,000 1,112,500,000 1,152,500,000 1,162,900,000 1,363,900,000 1,235,400,000 1,219,400,000 1,359,600,000 1,410,300,000 1,362,600,000 1,415,600,000 1,411,900,000 1,420,500,000 1,400,500,000 1,606,200,000 1,599,400,000 1,554,500,000 1,481,000,000 1,502,500,000 1,526,300,000 1,632,700,000 1,291,700,000 1,265,100,000 1,358,500,000 1,411,600,000 1,315,600,000 1,436,100,000 1,416,800,000 1,434,800,000 1,405,600,000 1,381,900,000 1,274,699,000 
        equity
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2026 and december 31, 2025
      		                                                    
        common stock
      		1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 
        treasury stock
      		-184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -184,000,000 -177,000,000 -153,900,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -140,700,000 -125,000,000 -30,000,000 -19,900,000 -19,900,000 -19,900,000 -9,400,000 -9,100,000 -4,400,000 -1,400,000   
        additional paid-in capital
      		731,800,000 732,200,000 731,800,000 731,600,000 730,200,000 732,800,000 730,300,000 729,200,000 727,500,000 729,800,000 729,000,000 727,900,000 726,300,000 728,100,000 726,400,000 724,400,000 722,300,000 721,200,000 719,400,000 717,100,000 715,300,000 715,700,000 714,700,000 714,100,000 712,900,000 712,100,000 710,900,000 709,700,000 488,000,000 488,800,000 488,000,000 487,300,000 486,000,000 486,200,000 487,900,000 489,200,000 493,600,000 492,100,000 490,600,000 489,000,000 486,100,000 538,400,000 536,600,000 449,600,000 446,900,000 443,400,000 436,900,000 433,000,000 452,400,000 449,700,000 511,300,000 556,292,000 
        accumulated other comprehensive loss
      		-4,700,000 -4,200,000 -1,100,000 -7,300,000 -7,500,000 -7,700,000 -13,500,000 -13,600,000 -12,900,000 -12,800,000 -12,700,000 -12,400,000 -12,800,000 -13,000,000 -16,400,000 -16,200,000 -15,300,000 -16,700,000 -17,600,000 -16,700,000 -17,700,000 -17,100,000 -16,200,000 -15,900,000 -15,500,000 -14,400,000 -13,900,000 -13,000,000 -13,100,000 -13,100,000 -14,000,000 -13,500,000 -21,300,000 -20,100,000 -18,800,000 -19,200,000 -18,900,000 -19,000,000 -18,800,000 -18,700,000 -19,800,000 -25,000,000 -11,700,000 -13,900,000 -14,100,000 -22,900,000 -7,900,000 -8,900,000 -8,300,000 -6,700,000 -6,500,000  
        retained earnings
      		37,600,000 52,300,000 148,200,000 136,400,000 144,900,000 138,100,000 124,800,000 104,300,000 91,400,000 80,200,000 75,000,000 76,500,000 63,000,000 53,500,000 48,500,000 13,900,000 1,000,000           139,500,000 137,200,000 127,400,000 125,600,000 114,100,000 109,900,000 100,100,000        6,000,000 86,800,000 136,000,000 143,800,000 132,800,000 118,800,000 91,200,000 59,600,000 36,900,000 20,000,000 12,003,000 
        total suncoke energy, inc. stockholders’ equity
      		581,700,000  695,900,000 677,700,000 684,600,000  658,600,000 636,900,000 623,000,000  608,300,000 609,000,000 593,500,000  575,500,000 539,100,000 525,000,000  487,700,000 468,400,000 479,500,000  478,900,000 486,400,000 484,200,000  520,600,000 696,500,000 472,100,000  459,600,000 447,900,000 434,600,000  295,200,000 284,500,000 313,400,000  292,800,000 285,200,000  395,100,000 582,400,000 552,500,000  534,100,000  506,900,000 500,000,000 479,200,000   
        noncontrolling interest
      		28,300,000  30,200,000 29,300,000 29,900,000  32,400,000 29,800,000 30,200,000  33,500,000 33,400,000 34,800,000  36,100,000 35,000,000 36,900,000  36,000,000 34,900,000 33,600,000  30,400,000 29,100,000 27,800,000                            
        total equity
      		610,000,000 626,100,000 726,100,000 707,000,000 714,500,000 711,000,000 691,000,000 666,700,000 653,200,000 645,500,000 641,800,000 642,400,000 628,300,000 622,700,000 611,600,000 574,100,000 561,900,000 535,400,000 523,700,000 503,300,000 513,100,000 500,900,000 509,300,000 515,500,000 512,000,000 518,400,000 546,800,000 722,800,000 687,000,000 682,700,000 682,600,000 672,400,000 659,500,000 659,600,000 508,700,000 507,400,000 571,200,000 639,900,000 619,400,000 615,700,000 622,800,000 670,300,000 852,100,000 825,000,000 832,300,000 807,100,000 574,900,000 543,600,000 535,400,000 513,300,000 559,900,000 604,495,000 
        total liabilities and equity
      		1,734,500,000 1,789,900,000 1,932,000,000 1,641,400,000 1,668,400,000 1,668,200,000 1,654,800,000 1,657,500,000 1,653,300,000 1,660,400,000 1,679,200,000 1,643,400,000 1,669,300,000 1,654,600,000 1,679,800,000 1,677,400,000 1,705,700,000 1,615,400,000 1,593,200,000 1,598,000,000 1,605,100,000 1,613,400,000 1,661,800,000 1,678,400,000 1,875,900,000 1,753,800,000 1,766,200,000 2,082,400,000 2,097,300,000 2,045,300,000 2,098,200,000 2,084,300,000 2,080,000,000 2,060,100,000 2,114,900,000 2,106,800,000 2,125,700,000 2,120,900,000 2,121,900,000 2,142,000,000 2,255,500,000 1,962,000,000 2,117,200,000 2,183,500,000 2,243,900,000 2,122,700,000 2,011,000,000 1,960,400,000 1,970,200,000 1,918,900,000 1,941,800,000 1,879,194,000 
        long-term finance lease liability
      		 2,600,000                                                   
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2025 and 2024
      		                                                    
        total suncoke energy, inc. stockholders' equity
      		 597,300,000    680,200,000    614,200,000    585,600,000    498,100,000    469,000,000    491,600,000    463,100,000    426,200,000    311,100,000   289,900,000    557,400,000        
        noncontrolling interests
      		 28,800,000    30,800,000    31,300,000    37,100,000    37,300,000    31,900,000    26,800,000 26,200,000 26,300,000 214,900,000 219,600,000 223,000,000 224,500,000 224,900,000 233,400,000 213,500,000 222,900,000 257,800,000 328,800,000 326,600,000 330,500,000 332,900,000 275,200,000 269,700,000 272,500,000 274,900,000 273,000,000 35,800,000 36,700,000 35,400,000 34,100,000 34,400,000 35,063,000 
        income tax payable
      		  1,600,000  11,900,000   1,500,000 4,500,000  1,300,000 1,500,000 4,000,000  2,400,000 1,400,000 3,900,000            1,200,000                        
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2025 and december 31, 2024
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2025 and december 31, 2024
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2025 and december 31, 2024
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2024 and 2023
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2024 and december 31, 2023
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2024 and december 31, 2023
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2024 and december 31, 2023
      		                                                    
        current portion of financing obligation
      		          6,300,000 3,400,000 3,400,000 3,300,000 3,300,000 3,200,000 3,200,000 3,200,000 3,100,000 3,100,000 3,000,000  5,100,000 3,000,000 3,000,000                            
        long-term debt and financing obligation
      		         490,300,000 489,800,000 493,000,000 528,400,000 528,900,000 561,200,000 594,600,000 625,000,000 610,400,000 597,800,000 650,200,000 641,600,000  719,700,000 768,100,000 924,800,000 780,000,000 780,000,000 828,000,000 828,800,000 834,500,000 834,700,000 860,000,000 860,200,000 861,100,000 859,000,000 870,300,000 847,000,000 849,200,000 860,900,000              
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2023 and 2022
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2023 and december 31, 2022
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2023 and december 31, 2022
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2023 and december 31, 2022
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2022 and 2021
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2022 and december 31, 2021
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2022 and december 31, 2021
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2022 and december 31, 2021
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2021 and 2020
      		                                                    
        retained deficit
      		                 -23,400,000 -31,100,000 -49,000,000 -35,100,000 -46,600,000 -36,600,000 -28,800,000 -30,200,000          -33,900,000 -45,500,000 -21,300,000 -22,000,000 -39,000,000 -45,100,000             
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2021 and december 31, 2020
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2021 and december 31, 2020
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2021 and december 31, 2020
      		                                                    
        goodwill and other intangible assets
      		                     37,200,000 37,700,000 36,800,000 37,400,000                 21,600,000 18,900,000 25,100,000 25,400,000        
        current portion of financing obligations
      		                     3,000,000                               
        long-term debt and financing obligations
      		                     673,900,000                               
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2020 and 2019
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2020 and december 31, 2019
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2020 and december 31, 2019
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2020 and december 31, 2019
      		                                                    
        other intangible assets
      		                         34,700,000 35,400,000 151,400,000 154,100,000 156,800,000 159,600,000 162,300,000 165,100,000 167,900,000 170,700,000 173,500,000 176,200,000 179,000,000 181,800,000 184,600,000 190,200,000            
        deferred revenue
      		                         300,000 2,100,000 13,500,000 7,500,000 3,000,000 2,600,000 3,200,000 3,600,000 1,700,000 16,600,000 12,000,000 5,600,000 2,500,000 27,600,000 20,300,000             
        current portion of long-term debt and financing obligation
      		                         2,900,000 2,900,000 5,100,000 4,500,000 3,900,000 3,900,000 3,800,000 3,800,000 2,600,000 2,600,000 3,700,000 6,100,000 4,900,000 3,600,000              
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2019 and 2018
      		                                                    
        retained (deficit) earnings
      		                         -30,100,000 -23,500,000              -36,400,000            
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2019 and december 31, 2018
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2019 and december 31, 2018
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2019 and december 31, 2018
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both december 31, 2018 and 2017
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both september 30, 2018 and december 31, 2017
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both june 30, 2018 and december 31, 2017
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at both march 31, 2018 and december 31, 2017
      		                                                    
        receivable from redemption of brazilian investment
      		                                     20,500,000               
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at december 31, 2017 and 2016
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at september 30, 2017 and december 31, 2016
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at june 30, 2017 and december 31, 2016
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at march 31, 2017 and december 31, 2016
      		                                                    
        assets held for sale
      		                                                    
        restricted cash
      		                                     500,000 700,000 2,300,000 18,200,000            
        investment in brazilian cokemaking operations
      		                                      41,000,000 41,000,000 41,000,000 41,000,000 41,000,000 41,000,000 41,000,000  41,000,000 41,000,000 41,000,000 41,000,000 41,000,000 40,976,000 
        long-term assets held for sale
      		                                                    
        liabilities held for sale
      		                                                    
        long-term liabilities held for sale
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at december 31, 2016 and 2015
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at september 30, 2016 and december 31, 2015
      		                                                    
        current portion of long-term debt
      		                                       1,100,000 1,100,000     800,000 3,300,000 3,300,000 3,300,000 3,300,000 3,300,000 3,000,000 
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at june 30, 2016 and december 31, 2015
      		                                                    
        equity method investment in visa suncoke limited
      		                                         21,700,000 58,500,000 56,800,000 56,800,000 52,500,000       
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at december 31, 2015 and 2014
      		                                                    
        current assets held for sale
      		                                         19,200,000           
        current liabilities held for sale
      		                                         24,100,000           
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued shares at march 31, 2015 and december 31, 2014
      		                                                    
        lease and mineral rights
      		                                          18,700,000 52,700,000 52,800,000 52,200,000 52,500,000 52,600,000 52,700,000 53,000,000 53,200,000 53,392,000 
        short-term debt, including current portion of long-term debt
      		                                          13,000,000 41,000,000 41,000,000        
        income taxes payable
      		                                          3,300,000    3,900,000      
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at june 30, 2014 and december 31, 2013
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at march 31, 2014 and december 31, 2013
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at december 31, 2013 and 2012
      		                                                    
        investment in brazil cokemaking operations
      		                                             41,000,000       
        obligation for black lung benefits
      		                                             34,100,000       
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at september 30, 2013 and december 31, 2012
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at december 31, 2012 and 2011
      		                                                    
        total suncoke energy, inc. stockholders’ equity / net parent investment
      		                                              539,100,000    525,500,000 569,432,000 
        accounts receivable
      		                                               91,100,000 53,500,000 78,300,000 66,200,000 52,033,000 
        commitments and contingent liabilities
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at september 30, 2012 and december 31, 2011
      		                                                    
        taxes payable
      		                                                11,400,000 12,000,000 10,600,000 11,593,000 
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at june 30, 2012 and december 31, 2011
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at march 31, 2012 and december 31, 2011
      		                                                    
        notes receivable from affiliate
      		                                                    
        advances from affiliate
      		                                                    
        payable to affiliate
      		                                                    
        preferred stock, 0.01 par value. authorized 50,000,000 shares; no issued and outstanding shares at december 31, 2011 and 2010
      		                                                    
        net parent investment
      		                                                    
        receivable from affiliate
      		                                                   672,000 
        preferred stock, 0.01 par value. authorized 50,000 shares; no issued and outstanding shares at september 30, 2011 and december 31, 2010
      		                                                    
        accumulated other comprehensive income
      		                                                   437,000 
      Cashflow Statements:
      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 2021-12-31 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 2015-03-31 2014-06-30 2014-03-31 2013-12-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 
                                                         
          cash flows from operating activities
        		                                                 
          net income
        		-3,400,000 -85,500,000 23,800,000 3,500,000 19,400,000 25,800,000 33,300,000 23,300,000 21,100,000 15,300,000 8,500,000 22,000,000 17,700,000 12,800,000 42,500,000 19,000,000 30,600,000 14,000,000 24,100,000 -7,500,000 18,200,000 -3,500,000 -1,400,000 7,800,000 5,900,000 -800,000 -163,100,000 3,300,000 12,200,000 5,500,000 17,100,000 11,400,000 13,000,000 173,900,000 18,800,000 -31,500,000 -57,700,000 31,500,000 14,400,000 400,000 -48,600,000 -3,800,000 18,700,000 29,000,000 32,900,000 24,000,000 16,600,000 7,520,000 21,732,000 
          adjustments to reconcile net income to net cash from operating activities:
        		                                                 
          depreciation and amortization expense
        		44,900,000 58,800,000 37,400,000 28,600,000 28,800,000 28,800,000 28,100,000 28,700,000 33,300,000 35,600,000 35,500,000 36,400,000 35,300,000 35,800,000 35,700,000 35,800,000 35,200,000 34,900,000 32,500,000 34,100,000 32,400,000 32,000,000 33,500,000 34,100,000 34,100,000 34,000,000 35,600,000 37,000,000 37,200,000 41,300,000 35,400,000 32,000,000 32,900,000 31,000,000 30,600,000 33,300,000 33,300,000 31,800,000 25,600,000 23,800,000          
          deferred income tax expense
        		7,400,000 -24,300,000   -2,200,000 -3,200,000 8,300,000 -1,000,000 400,000 2,800,000 9,700,000 3,300,000 2,800,000 500,000 -7,400,000 3,900,000 5,300,000 3,500,000 5,200,000 -2,500,000 3,100,000 -3,300,000 400,000 3,900,000 11,100,000       100,000 200,000 -157,600,000 -9,400,000 14,000,000 65,800,000  900,000 3,100,000   400,000 -4,900,000 29,200,000 5,600,000 4,400,000 9,370,000 9,479,000 
          share-based compensation expense
        		700,000 400,000 200,000 1,400,000 400,000 -100,000 1,100,000 1,700,000 1,300,000 800,000 1,100,000 1,600,000 1,600,000 1,700,000 2,000,000 1,900,000 1,100,000 1,800,000 2,000,000 1,800,000 500,000 900,000 600,000 1,200,000 1,100,000 1,200,000 1,200,000 1,200,000 900,000 900,000 600,000 800,000 800,000 700,000 1,100,000 1,400,000 1,600,000 1,500,000 1,600,000 1,500,000 3,000,000 2,300,000 2,100,000  1,600,000 1,500,000 2,000,000   
          changes in working capital pertaining to operating activities:
        		                                                 
          receivables
        		-2,900,000 24,300,000 -16,500,000 7,300,000 15,900,000 -16,500,000 65,000,000 -34,400,000 -23,000,000 -7,500,000 16,700,000 -15,700,000 23,300,000 12,400,000 -14,200,000 -8,600,000 -21,900,000 -17,500,000 -10,600,000 -3,700,000 500,000 500,000 2,700,000 5,900,000 4,100,000 3,200,000 36,200,000 -12,600,000 -10,900,000 100,000 5,000,000 -5,200,000 -6,800,000 1,700,000 -4,900,000 -3,100,000 -1,500,000 -6,600,000 -5,900,000 16,400,000 11,200,000 10,000,000 -22,200,000       
          inventories
        		34,300,000 -3,200,000 9,500,000 -5,500,000 -28,900,000 15,000,000 12,400,000 -20,000,000 -5,600,000 24,100,000 -6,100,000 33,800,000 -59,000,000 29,600,000 -11,700,000 800,000 -66,900,000 2,300,000 14,300,000 -8,800,000 -8,900,000 4,500,000 5,500,000 14,900,000 -3,100,000 10,000,000 18,700,000 -25,000,000 -40,300,000 7,600,000 -1,600,000 -6,300,000 900,000 10,700,000 -5,300,000 -5,300,000 -18,600,000 5,300,000 8,600,000 10,600,000 -15,600,000 10,500,000 900,000 29,100,000 17,300,000 -9,200,000 18,900,000 2,722,000 -78,282,000 
          accounts payable
        		-9,800,000 -1,300,000 -2,500,000 -11,500,000 -3,300,000 4,100,000 -2,300,000 -6,600,000 -8,100,000 -5,800,000 10,400,000 -7,100,000 22,200,000 900,000 -5,400,000 -10,000,000 41,900,000 16,200,000 -800,000 1,200,000 12,900,000 800,000 18,100,000 -34,100,000 -22,800,000 17,500,000 -17,000,000 -6,900,000 29,900,000 -31,300,000 13,800,000 2,800,000 14,000,000 -21,200,000 17,300,000 -10,800,000 26,400,000 2,700,000 2,000,000 -10,700,000 -14,900,000 -17,600,000 27,100,000       
          accrued liabilities
        		-3,500,000 -900,000 -16,100,000 7,600,000 -11,800,000 3,200,000 -30,000,000 6,900,000 -12,000,000 -4,000,000 11,200,000 -2,100,000 -15,300,000 6,000,000 3,300,000 3,000,000 -3,900,000 2,600,000 3,000,000 900,000 -3,700,000 5,800,000 2,200,000 -200,000 -5,300,000 1,600,000 -1,500,000 4,600,000 -4,400,000 0 1,700,000 -300,000 -8,700,000 1,300,000 7,500,000 2,700,000 -8,900,000 100,000 -300,000 -6,300,000 5,300,000 -22,500,000 5,600,000       
          interest payable
        		4,700,000 -6,100,000   6,100,000    6,100,000    6,100,000    6,100,000 -6,700,000 6,100,000 -12,400,000 11,000,000 -11,900,000 11,800,000 -12,000,000 11,900,000 -12,200,000 10,500,000 -12,900,000 13,200,000 -13,100,000 12,600,000 -13,000,000 11,700,000 -12,200,000 11,000,000 -100,000 -9,500,000 9,400,000 -10,000,000 -11,200,000 7,100,000 -10,400,000 10,400,000 7,600,000 -7,500,000 7,800,000 -8,100,000   
          income taxes
        		7,100,000 -400,000 -23,700,000 -12,000,000 10,900,000 5,600,000 -7,100,000 -3,000,000 5,900,000 -2,100,000 -200,000 -2,500,000 3,400,000  1,000,000 -2,500,000 3,300,000 500,000 2,300,000 -1,100,000 3,800,000 1,900,000 -1,300,000 -2,300,000 -1,600,000 900,000 100,000 -4,400,000 1,900,000 2,400,000   -600,000 4,200,000 7,500,000 -10,800,000 -1,100,000 2,600,000 2,500,000 -2,800,000          
          other operating activities
        		-6,800,000  -14,100,000 4,500,000 -9,500,000  1,800,000 1,200,000 -9,400,000  800,000                                       
          net cash from operating activities
        		72,700,000 56,600,000 9,200,000 17,500,000 25,800,000 60,900,000 107,200,000 -9,300,000 10,000,000 56,400,000 93,700,000 68,700,000 30,200,000 88,300,000 54,400,000 43,500,000 22,700,000 49,100,000 79,400,000 39,800,000 64,800,000 34,700,000 74,500,000 21,800,000 26,800,000 61,400,000 84,900,000 300,000 35,300,000 15,200,000 85,300,000 28,000,000 57,300,000 20,200,000 73,900,000 24,900,000 29,500,000 53,000,000 44,600,000  36,600,000 -11,300,000 63,700,000 128,300,000 -8,900,000 89,800,000 -3,100,000 42,621,000 42,263,000 
          cash flows from investing activities
        		                                                 
          capital expenditures
        		-17,000,000 -23,800,000 -25,500,000 -12,600,000 -4,900,000 -24,800,000 -15,100,000 -17,500,000 -15,500,000 -24,700,000 -34,100,000 -27,800,000 -22,600,000 -19,800,000 -21,700,000 -21,100,000 -12,900,000 -46,500,000 -18,400,000 -13,600,000 -20,100,000 -20,500,000 -16,500,000 -14,100,000 -22,800,000 -28,600,000 -28,400,000 -32,200,000 -20,900,000 -29,600,000 -27,100,000 -28,200,000 -15,400,000 -26,000,000 -27,200,000 -9,700,000 -12,700,000 -20,800,000 -12,700,000  -39,700,000 -38,100,000 -50,000,000 -40,000,000 -19,900,000 -11,200,000 -9,500,000 -53,883,000 -56,252,000 
          free cash flows
        		55,700,000 32,800,000 -16,300,000 4,900,000 20,900,000 36,100,000 92,100,000 -26,800,000 -5,500,000 31,700,000 59,600,000 40,900,000 7,600,000 68,500,000 32,700,000 22,400,000 9,800,000 2,600,000 61,000,000 26,200,000 44,700,000 14,200,000 58,000,000 7,700,000 4,000,000 32,800,000 56,500,000 -31,900,000 14,400,000 -14,400,000 58,200,000 -200,000 41,900,000 -5,800,000 46,700,000 15,200,000 16,800,000 32,200,000 31,900,000  -3,100,000 -49,400,000 13,700,000 88,300,000 -28,800,000 78,600,000 -12,600,000 -11,262,000 -13,989,000 
          acquisition of phoenix global, net of cash acquired
        		1,800,000 0                                                
          other investing activities
        		-500,000 -400,000 -800,000 0 300,000 100,000 900,000 -800,000 400,000  -1,300,000 100,000 300,000 1,700,000   -100,000     0    100,000 0   200,000 0       0 0           
          net cash from investing activities
        		-15,700,000 -24,200,000 -297,800,000 -12,600,000 -4,600,000 -24,700,000 -14,200,000 -18,300,000 -15,100,000 -23,800,000 -35,400,000 -27,700,000 -22,300,000 -18,100,000 -18,100,000 -21,000,000 -13,000,000 -47,200,000 -18,400,000 -13,600,000 -20,100,000 -20,500,000 -17,900,000 -14,100,000 -22,800,000 -28,500,000 -28,400,000 -32,000,000 -20,900,000 -29,400,000 -27,100,000 -23,900,000 -15,400,000 -25,600,000 -27,200,000 -9,700,000 7,900,000 -100,000 -11,800,000  -39,700,000 -38,100,000 -134,700,000 -43,500,000 -19,900,000 -11,200,000 -9,500,000 -53,908,000 -56,252,000 
          cash flows from financing activities
        		                                                 
          proceeds from revolving facility
        		88,000,000 159,000,000    0 0 0 11,000,000 18,000,000 51,000,000 83,000,000 139,000,000 146,000,000 123,000,000 190,000,000 137,000,000 109,000,000 110,500,000 308,800,000 161,800,000                    24,000,000 16,000,000        
          repayment of revolving facility
        		-114,000,000 -165,000,000    0 0 0 -11,000,000 -18,000,000 -51,000,000 -118,000,000 -139,000,000 -178,000,000 -156,000,000 -220,000,000 -122,000,000 -96,000,000 -161,500,000 -211,800,000 -194,100,000                    -56,000,000 -16,000,000        
          dividends paid
        		-10,700,000 -10,200,000 -10,100,000 -10,200,000 -10,900,000 -10,100,000 -10,100,000 -8,400,000 -9,000,000 -8,400,000 -8,400,000 -7,200,000 -6,700,000 -6,700,000 -6,600,000 -5,300,000 -5,000,000 -5,000,000 -5,000,000 -5,000,000 -5,100,000 -4,900,000 -5,000,000 -5,000,000 -5,000,000               -3,900,000          
          cash distribution to noncontrolling interests
        		-1,500,000  -700,000 -2,200,000 -3,000,000  0 -2,200,000 -2,200,000  -1,400,000 -3,000,000 -3,700,000  0 -2,900,000 -1,500,000          0 -7,100,000 -7,100,000  -7,100,000 -7,100,000 -10,600,000  -11,400,000 -12,200,000 -12,400,000  -12,200,000 -9,100,000 -8,400,000 -6,400,000        
          repayment of finance lease liabilities
        		-2,000,000 -6,300,000                                                
          other financing activities
        		-1,100,000 0 200,000 0 -3,200,000 2,500,000 -100,000 0 -3,700,000 0 0 0 -3,400,000 0 0 200,000 -1,500,000 0 200,000 0 -1,000,000 100,000 -100,000 0 -400,000 -400,000 -2,500,000 -1,900,000 -3,100,000 -400,000 100,000 800,000 -100,000 1,400,000 0 0 -300,000 -900,000            
          net cash from financing activities
        		-41,300,000 -24,100,000 182,400,000 -12,400,000 -17,100,000 -11,300,000 -10,200,000 -10,600,000 -14,900,000 -18,400,000 -10,600,000 -46,100,000 -14,600,000 -39,500,000 -40,400,000 -38,800,000 6,200,000 7,300,000 -58,100,000 -28,500,000 -39,100,000 -51,800,000 -51,700,000 -162,400,000 134,700,000 -29,500,000 -65,000,000 -10,000,000 -16,200,000 -8,500,000 -32,800,000 -8,100,000 -15,100,000 -23,100,000 -34,700,000 -35,700,000 -14,200,000 -24,200,000 -35,500,000  29,300,000 -6,000,000 35,800,000 -3,400,000 -3,400,000 -2,200,000 -1,300,000 27,929,000 94,368,000 
          net increase in cash and cash equivalents
        		15,700,000 8,300,000   4,100,000 24,900,000    14,200,000   -6,700,000 30,700,000 -4,100,000 -16,300,000 15,900,000 9,200,000 2,900,000 -2,300,000 5,600,000    138,700,000 3,400,000 -8,500,000 -41,700,000 -1,800,000     -28,500,000 12,000,000 -20,500,000 23,200,000   26,400,000 26,200,000 -55,400,000 -35,200,000 81,400,000 -32,200,000   16,642,000 80,379,000 
          cash and cash equivalents at beginning of period
        		88,700,000  0 0 189,600,000  0 0 140,100,000  0 0 90,000,000  0 0 63,800,000  0 0 48,400,000  0 0 97,100,000  0 0 145,700,000      0 0 134,000,000  0 139,000,000 0 233,600,000   0 0 127,500,000  0 
          cash and cash equivalents at end of period
        		104,400,000  -105,800,000 -7,500,000 193,700,000  82,800,000 -38,200,000 120,100,000  47,700,000 -5,100,000 83,300,000  -4,100,000 -16,300,000 79,700,000  2,900,000 -2,300,000 54,000,000  4,900,000 -154,700,000 235,800,000  -8,500,000 -41,700,000 143,900,000      12,000,000 -20,500,000 157,200,000  -2,700,000 165,400,000 26,200,000 178,200,000   -32,200,000 76,400,000 113,600,000  80,379,000 
          supplemental disclosure of cash flow information
        		                                                 
          interest paid
        		4,500,000 15,400,000 900,000   12,200,000 0    100,000 12,800,000 500,000                  2,800,000 28,300,000 3,500,000 27,300,000 4,500,000 14,600,000 22,600,000 4,200,000 23,400,000           
          income taxes paid, net of refunds of 16.3 million and 3.8 million, respectively
        		-14,900,000                                                 
          cash flows from operating activities:
        		                                                 
          long-lived asset impairment
        		                                                 
          gain on extinguishment of legacy coal liabilities
        		     0                                            
          other
        		            -7,900,000 -3,400,000 2,400,000 6,300,000 -8,100,000 -3,700,000 1,600,000 6,400,000 -4,600,000 9,600,000 3,300,000 3,100,000 -5,200,000 7,100,000 -3,900,000 8,300,000 -7,900,000 1,400,000 4,200,000 600,000 -1,700,000 2,800,000 -4,600,000 9,000,000 -2,800,000 1,600,000 -300,000 -5,600,000 -400,000 -7,400,000 -1,000,000 -1,200,000 -4,000,000 -2,300,000 -5,000,000 8,000 40,000 
          cash flows from investing activities:
        		                                                 
          cash flows from financing activities:
        		                                                 
          repayment of financing obligation
        		         -6,300,000 -800,000 -900,000 -800,000 -800,000 -800,000 -800,000 -800,000 -700,000 -800,000 -700,000 -700,000  -700,000 -700,000 -700,000 -800,000 -700,000 -700,000 -700,000 -700,000 -600,000 -700,000 -600,000 -700,000 -600,000 -600,000 -600,000 -500,000            
          debt issuance costs
        		 -100,000                0 -1,500,000       -100,000    0 0 0 -500,000 -800,000 -1,000,000 -15,000,000 -600,000 0  -4,200,000   0     -226,000  
          cash distributions to noncontrolling interests
        		                                                 
          effect of translation changes on cash
        		 0                                                
          cash and cash equivalents at beginning of year
        		                                                 
          cash and cash equivalents at end of year
        		                                                 
          income taxes paid, net of refunds of 5.2 million, 0.3 million and zero, respectively
        		                                                 
          income taxes paid, net of refunds of 5.0 million and zero, respectively
        		  1,200,000                                               
          deferred income tax benefit
        		                         1,100,000                        
          net decrease in cash and cash equivalents
        		       -38,200,000 -20,000,000              4,900,000                        -13,900,000   
          income taxes paid, net of refunds of 3.8 million and zero, respectively
        		    -3,200,000                                             
          income taxes paid, net of refunds of 0.3 million, zero and 0.5 million, respectively
        		                                                 
          income taxes paid
        		      6,900,000 9,700,000 700,000  5,100,000 7,500,000 500,000    1,400,000    400,000    900,000    1,000,000                     
          loss on extinguishment of debt
        		                 0 0       0    0 0 0 300,000    100,000   9,400,000          
          proceeds from issuance of long-term debt
        		                 0 0           0 0 0 45,000,000 73,100,000 0     210,800,000   0     29,400,000  
          repayment of long-term debt
        		                 0 0   -40,100,000 -6,900,000 0 -8,900,000 0 -89,900,000 -300,000 -300,000 -300,000 -200,000 -300,000 -44,900,000 0 -112,700,000 -531,900,000 -300,000 -5,300,000 -13,800,000 -149,500,000   0 -800,000 -800,000 -900,000 -800,000 -850,000  
          interest paid, net of capitalized interest of zero, zero and 0.5 million, respectively
        		                                                 
          income taxes paid, net of refunds of zero, 0.5 million and 2.9 million, respectively
        		                                                 
          proceeds from financing obligation
        		                                     0            
          shares repurchased
        		                     0 0 0 -7,000,000 -23,100,000              -20,000,000          
          interest paid, net of capitalized interest of zero, 0.5 million and 0.2 million, respectively
        		                                                 
          income taxes paid, net of refunds of 0.5 million, 2.9 million and 3.0 million, respectively
        		                                                 
          interest paid, net of capitalized interest of zero and 0.4 million, respectively
        		                                                 
          income taxes paid, net of refunds of zero and 2.9 million, respectively
        		              3,600,000                                   
          interest paid, net of capitalized interest of zero and 0.3 million, respectively
        		                                                 
          interest paid, net of capitalized interest of zero and 0.1 million, respectively
        		                900,000                                 
          long-lived asset and goodwill impairment
        		                         0                        
          interest paid, net of capitalized interest of 0.5 million, 0.2 million and 2.3 million, respectively
        		                                                 
          income taxes paid, net of refunds of 2.9 million, 3.0 million and 0.3 million, respectively
        		                                                 
          payments in excess of expense for postretirement plan benefits
        		                  -300,000 -500,000 -400,000 -300,000 -400,000 -500,000 -500,000 -400,000 -400,000 -500,000 -600,000 -600,000 -700,000 -500,000 -600,000  -400,000 -500,000 -700,000             
          interest paid, net of capitalized interest of 0.4 million and 0.1 million, respectively
        		                                                 
          income taxes paid, net of refunds of 2.9 million and 0.3 million, respectively
        		                  1,900,000                               
          interest paid, net of capitalized interest of 0.3 million and zero, respectively
        		                                                 
          gain on extinguishment of debt
        		                      -500,000 0 -2,900,000                         
          interest paid, net of capitalized interest of 0.1 million and zero, respectively
        		                    500,000                             
          loss from equity method investment
        		                             0 0                   
          sale of equity method investment
        		                             0 0                   
          repayment of financing obligations
        		                                                 
          acquisition of additional interest in the partnership
        		                             0 0 -800,000 -3,400,000 -15,100,000 -9,000,000               
          interest paid, net of capitalized interest of 0.2 million, 2.3 million and 3.2 million, respectively
        		                                                 
          income taxes paid, net of refunds of 3.0 million, 0.3 million and 4.3 million, respectively
        		                                                 
          proceeds from revolving credit facility
        		                      160,700,000 0 247,200,000  217,000,000 114,900,000 60,700,000  34,700,000 39,000,000 53,500,000  140,000,000 118,000,000 10,000,000  0           
          repayment of revolving credit facility
        		                      -199,700,000 -156,700,000 -90,500,000  -173,700,000 -114,900,000 -65,700,000  -59,700,000 -39,000,000 -53,500,000  -40,000,000 -190,000,000 -10,000,000  -25,000,000           
          interest paid, net of capitalized interest of 0.1 million and 2.3 million, respectively
        		                                                 
          income taxes paid, net of refunds of 0.3 million and zero, respectively
        		                      1,200,000                           
          interest paid, net of capitalized interest of zero and 2.3 million, respectively
        		                                                 
          interest paid, net of capitalized interest of zero and 1.2 million, respectively
        		                        1,600,000                         
          deferred revenue
        		                         -1,800,000 -11,400,000 6,000,000 4,500,000 400,000 -600,000 -400,000 1,900,000 -14,900,000 4,600,000 6,400,000 3,100,000 -25,100,000 7,300,000           
          return of brazilian investment
        		                                 0 0 0 20,500,000             
          cash, cash equivalents and restricted cash at beginning of year
        		                                                 
          interest paid, net of capitalized interest of 2.3 million, 3.2 million and 1.1 million, respectively
        		                                                 
          income taxes paid, net of refunds of 0.3 million, 4.3 million and 1.0 million, respectively
        		                                                 
          interest paid, net of capitalized interest of 2.3 million and 2.2 million, respectively
        		                                                 
          income taxes paid, net of refunds of zero and 3.2 million, respectively
        		                                                 
          interest paid, net of capitalized interest of 2.3 million and 1.3 million, respectively
        		                                                 
          income taxes paid, net of refunds of zero and 1.3 million, respectively
        		                                                 
          deferred income tax (benefit) expense
        		                            -400,000            -66,800,000 -3,100,000        
          interest paid, net of capitalized interest of 1.2 million and 0.5 million, respectively
        		                            900,000                     
          loss on divestiture of business
        		                                      0           
          changes in working capital pertaining to operating activities
        		                                                 
          divestiture of coal business
        		                                     0 -700,000           
          net increase in cash, cash equivalents and restricted cash
        		                             -22,700,000 25,400,000 -4,000,000 26,800,000                 
          cash, cash equivalents and restricted cash at end of year
        		                                                 
          interest paid, net of capitalized interest of 3.2 million, 1.1 million and 5.0 million, respectively
        		                                                 
          income taxes paid, net of refunds of 4.3 million, 1.0 million and 8.2 million, respectively
        		                                                 
          cash, cash equivalents and restricted cash at beginning of period
        		                              0 0 120,200,000                 
          cash, cash equivalents and restricted cash at end of period
        		                              25,400,000 -4,000,000 147,000,000                 
          income taxes paid, net of refunds of 3.2 million and 1.0 million in 2018 and 2017, respectively
        		                                                 
          income taxes paid, net of refunds of 1.3 million and 0.1 million in 2018 and 2017, respectively
        		                                                 
          income taxes paid, net of refunds of zero and 0.1 million in the three months ended march 31, 2018 and 2017, respectively.
        		                                2,300,000                 
          gain on curtailment and payments in excess of expense for postretirement plan benefits
        		                                     -600,000 -800,000           
          settlement loss and payments in excess of expense for pension plan
        		                                                 
          loss on divestiture of business and impairments
        		                                                 
          decrease in restricted cash
        		                                 400,000 0 0 100,000             
          acquisition of businesses, net of cash received
        		                                                 
          suncoke energy partners, l.p. units repurchased
        		                                                 
          income taxes paid, net of refunds of 1.0 million, 8.2 million and 1.5 million, respectively
        		                                                 
          loss loss on extinguishment of debt
        		                                                 
          income taxes paid, net of refunds of 1.0 and 6.3 million in 2017 and 2016, respectively.
        		                                                 
          income taxes paid, net of refunds of 0.1 million and 4.0 million in 2017 and 2016, respectively.
        		                                                 
          asset impairment
        		                                                 
          income taxes paid, net of refunds of 0.1 million in 2017 and no refunds in 2016
        		                                    1,500,000             
          income from equity method investment
        		                                       700,000 900,000 600,000        
          (gain) loss on extinguishment of debt
        		                                     -100,000 -1,000,000           
          accrual for black lung benefits
        		                                                 
          decrease (increase) in restricted cash
        		                                     200,000            
          proceeds from issuance of common units of suncoke energy partners, l.p., net of offering costs
        		                                                 
          income taxes paid, net of refunds of 8.2 million, 1.5 million and 4.6 million, respectively
        		                                                 
          settlement loss and expense for pension plan
        		                                                 
          acquisition of business
        		                                                 
          units repurchased
        		                                                 
          income taxes paid, net of refunds of 6.3 million in 2016 and no refunds in 2015
        		                                                 
          proceeds from exercise of stock options, net of shares withheld for taxes
        		                                       -500,000          
          income taxes paid, net of refunds of 4.0 million in 2016 and no refunds in 2015
        		                                                 
          asset and goodwill impairment
        		                                                 
          excess tax benefit from share-based awards
        		                                        0 -200,000        
          restricted cash
        		                                                 
          equity method investment in visa suncoke limited
        		                                          0       
          income taxes paid, net of refunds of, 1.5 million and 4.6 million in 2015 and 2014, respectively, and no refunds in 2013.
        		                                                 
          cash flows from continuing operating activities:
        		                                                 
          adjustments to reconcile net income to net cash from continuing operating activities:
        		                                                 
          income from discontinued operations, net of tax
        		                                       2,000,000          
          gain on curtailment and payments in excess of expense for retirement plans
        		                                       -4,700,000          
          net cash from continuing operating activities
        		                                       26,600,000          
          cash flows from continuing investing activities:
        		                                                 
          net cash from continuing investing activities
        		                                       -8,300,000          
          cash flows from continuing financing activities:
        		                                                 
          net cash from continuing financing activities
        		                                       23,600,000          
          net increase in cash and cash equivalents from continuing operations
        		                                       41,900,000          
          cash flows from discontinued operations:
        		                                                 
          cash flows from discontinued operations - operating activities
        		                                       -15,500,000          
          cash flows from discontinued operations - investing activities
        		                                                 
          net decrease in cash and cash equivalents from discontinued operations
        		                                       -15,500,000          
          depreciation, depletion and amortization
        		                                        28,600,000 29,000,000 25,500,000 23,300,000 18,900,000 20,200,000 18,400,000 16,023,000 14,752,000 
          payments in excess of expense for retirement plans
        		                                                 
          net proceeds from issuance of suncoke energy partners, l.p. units
        		                                                 
          proceeds from exercise of stock options
        		                                        300,000 200,000 1,600,000 0 2,100,000 1,700,000 900,000   
          payments less than (in excess of) expense for retirement plans
        		                                         100,000    700,000 300,000   
          income taxes receivable
        		                                         1,200,000        
          proceeds from issuance of common units of suncoke energy partners, l.p.
        		                                                 
          repurchase of common stock
        		                                          0 -300,000 -4,700,000 -3,000,000 -1,400,000   
          payments (in excess of) less than expense for retirement plans
        		                                           -400,000      
          loss on firm purchase commitment
        		                                               -44,000 0 
          income taxes payable
        		                                           6,200,000      
          purchase of noncontrolling interest in indiana harbor facility
        		                                               0  
          net decrease in advances from affiliate
        		                                                 
          repayments of notes payable assumed in acquisition
        		                                               15,000 0 
          increase in payable to affiliate
        		                                               21,000 7,000,000 
          changes in working capital pertaining to operating activities, net of acquisition:
        		                                                 
          cash distribution to noncontrolling interest
        		                                                 
          stock compensation expense
        		                                                 
          acquisition of business, net of cash received
        		                                               -25,000 0 
          proceeds from sale of assets
        		                                                 
          contribution from parent
        		                                                 
          cash distributions to noncontrolling interests in cokemaking operations
        		                                               -414,000 0 
          loss on firm purchase commitments
        		                                                 
          accounts receivable
        		                                            -37,600,000 24,800,000 -12,100,000 -14,143,000 19,638,000 
          accounts payable and accrued liabilities
        		                                            -28,600,000 17,800,000 -39,900,000 30,296,000 59,009,000 
          decrease in advances from affiliate
        		                                                 
          taxes payable
        		                                             -1,100,000 1,400,000 -14,664,000 -4,597,000 
          increase in advances from affiliate
        		                                                 
          prepaid coke inventory for firm purchase commitment
        		                                                 
          net increase in advances from affiliate
        		                                                 
          proceeds from sales of assets