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Marathon Petroleum Corporation
(NYSE:MPC) 

MPC stock logo

Marathon Petroleum Corporation, together with its subsidiaries, engages in refining, marketing, retailing, and transporting petroleum products primarily in the United States. It operates in two segments: Refining & Marketing, and Midstream. The Refining & Marketing segment refines crude oil and othe...

Founded: 1887
Full Time Employees: 60,910
Sector: Energy
Industry: Oil & Gas Refining & Marketing

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At a glance:
  • Earnings Tied to Refining Margins and Crack Spreads: Marathon Petroleum’s results are heavily influenced by refining and marketing profitability, with earnings rising and falling alongside industry crack spreads, product demand, and refinery utilization rates.
  • Midstream Exposure Provides More Stable Cash Flow (MPLX Stake): The company’s significant interest in MPLX adds fee-based midstream cash flow that can help diversify and stabilize performance versus the more cyclical refining segment.
  • Capital Returns Are a Core Part of the Equity Story: Marathon Petroleum has emphasized returning capital to shareholders through dividends and share repurchases, supported by cash generation in strong margin environments.
  • Operational Reliability and Turnaround Execution Matter: Unplanned outages, maintenance turnarounds, and refinery performance can materially impact quarterly results, making operational execution and utilization key near-term drivers.
  • Key Risks Include Commodity Volatility and Regulatory Pressures: Exposure to crude/product price dynamics, RIN/renewable fuel compliance costs, and evolving emissions and fuel regulations remain important factors that can affect margins and valuation.
Bull Thesis:
  • Robust Refining Margins: Current market conditions, including strong crack spreads for gasoline and diesel, are driving high profitability for Marathon Petroleum's refining segment. Global demand recovery and supply constraints continue to support favorable margins.
  • Significant Shareholder Returns: MPC has a strong track record of returning substantial capital to shareholders through aggressive share buybacks and consistent dividends. Strong free cash flow generation supports the continuation of these shareholder-friendly policies.
  • Stable Midstream Contribution from MPLX: Marathon Petroleum's ownership of MPLX provides a stable, fee-based cash flow stream from its midstream operations. This segment offers diversification and reduces the overall earnings volatility inherent in the refining business.
  • Strategic Asset Base and Operational Efficiency: As one of the largest refiners in the U.S., MPC benefits from a strategically located and complex refining system. This allows for operational efficiencies, economies of scale, and the flexibility to process various crude types to maximize product yields.
Bear Thesis:
  • Cyclicality and Volatility of Refining Margins: Refining profitability is highly cyclical and sensitive to crude oil prices, product demand, and inventory levels. A downturn in crack spreads due to oversupply, reduced demand, or increased competition could significantly impact earnings.
  • Long-term Demand Headwinds from Energy Transition: The accelerating global energy transition, including the increasing adoption of electric vehicles and renewable energy sources, poses a long-term threat to demand for refined petroleum products, potentially impacting future volumes and profitability.
  • Regulatory and Environmental Compliance Costs: Increasing environmental regulations, carbon reduction targets, and renewable fuel mandates could lead to higher operating costs, significant capital expenditures for compliance, and potential operational restrictions for MPC's refining assets.
  • Impact of Economic Downturns: A significant economic recession or slowdown would directly reduce demand for transportation fuels (gasoline, diesel, jet fuel), leading to lower sales volumes and potentially weaker refining margins, negatively impacting MPC's financial performance.
Main Competitors:
  • Valero Energy Corporation ($VLO) (Refined petroleum products (gasoline, diesel, jet fuel)), Valero is a pure-play independent refiner, directly competing with Marathon Petroleum in the refining of crude oil into various petroleum products and their subsequent wholesale and retail distribution. Both companies vie for crude feedstock, market share in refined products, and operational efficiency across their refinery networks.
  • Phillips 66 ($PSX) (Refined petroleum products, chemicals, midstream services), Phillips 66 is another major independent refiner and marketer, competing with Marathon Petroleum across its refining, marketing, and midstream segments. They compete for market share in refined fuels, access to crude oil, and efficiency in logistics and distribution, often having overlapping operational footprints.
  • ExxonMobil Corporation ($XOM) (Full range of petroleum products, chemicals, lubricants, retail fuel), As an integrated global energy company, ExxonMobil competes with Marathon Petroleum through its vast downstream refining and marketing operations. Its massive scale, global reach, and strong brand presence allow it to compete for market share in refined products, lubricants, and chemicals, often leveraging its upstream integration for supply advantages.
  • PBF Energy Inc. ($PBF) (Refined petroleum products (gasoline, diesel, jet fuel)), PBF Energy is a smaller but significant independent refiner that competes with Marathon Petroleum in specific regional markets for crude oil supply and the sale of refined products. Competition often centers on refinery utilization rates, product yields, and local market pricing dynamics.
Moat:
Marathon Petroleum Corporation operates in a highly competitive and capital-intensive downstream energy sector. Its primary moat stems from the strategic location and scale of its refining assets, operational efficiency, and integrated logistics network (via MPLX LP). Competition is fierce, driven by other large independent refiners, integrated oil majors with significant downstream operations, and regional players. Key competitive factors include access to cost-advantaged crude oil, refinery utilization rates, product yields, distribution efficiency, and the ability to manage volatile crack spreads and regulatory environments. The industry also faces long-term competitive pressures from the global energy transition and evolving demand for fossil fuels.
Income 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 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 
                                                                
      revenues and other income:
                                                                
      sales and other operating revenues
    34,200,000,000 32,574,000,000 34,809,000,000 33,799,000,000 31,517,000,000 33,137,000,000 35,107,000,000 37,914,000,000 32,706,000,000 36,255,000,000 40,917,000,000 36,343,000,000 34,864,000,000 39,813,000,000 45,787,000,000 53,795,000,000 38,058,000,000 35,336,000,000 32,321,000,000 29,615,000,000 22,711,000,000 17,972,000,000 17,408,000,000 15,024,000,000 25,215,000,000 31,092,000,000 31,043,000,000 33,547,000,000 28,081,000,000 32,151,000,000 22,787,000,000 22,118,000,000 18,694,000,000 20,884,000,000 19,053,000,000 18,033,000,000 16,288,000,000 17,155,000,000 16,618,000,000 16,811,000,000 12,755,000,000 15,607,000,000 18,716,000,000 20,537,000,000 17,191,000,000 22,250,000,000 25,438,000,000 26,844,000,000 23,285,000,000 24,896,000,000 26,253,000,000 25,675,000,000 23,328,000,000 20,684,000,000 21,047,000,000 20,240,000,000 20,264,000,000 19,418,000,000 20,614,000,000 20,732,000,000 
      income from equity method investments
    176,000,000 204,000,000 976,000,000 212,000,000 230,000,000 252,000,000 219,000,000 373,000,000 204,000,000 195,000,000 215,000,000 199,000,000 133,000,000 186,000,000 180,000,000 147,000,000 142,000,000 152,000,000 122,000,000 93,000,000 91,000,000 102,000,000 117,000,000 105,000,000 -1,210,000,000 64,000,000 124,000,000 107,000,000 99,000,000 111,000,000 96,000,000 80,000,000 86,000,000 82,000,000 84,000,000 83,000,000 57,000,000 51,000,000 -208,000,000 -50,000,000 22,000,000 30,000,000 23,000,000 20,000,000 15,000,000 32,000,000 29,000,000 57,000,000 35,000,000 20,000,000 9,000,000 7,000,000  8,000,000 7,000,000 9,000,000 2,000,000 9,000,000 15,000,000 17,000,000 
      other income
    192,000,000 475,000,000 66,000,000 84,000,000 103,000,000 66,000,000 49,000,000 76,000,000 281,000,000 282,000,000 341,000,000 269,000,000 77,000,000 105,000,000 219,000,000 257,000,000 202,000,000 102,000,000 170,000,000 119,000,000 77,000,000 49,000,000 22,000,000 67,000,000 71,000,000 67,000,000 31,000,000 30,000,000 35,000,000 80,000,000 47,000,000 45,000,000 30,000,000 101,000,000 92,000,000 84,000,000 43,000,000 72,000,000 49,000,000 29,000,000 28,000,000 41,000,000 17,000,000 25,000,000 29,000,000 54,000,000 12,000,000 21,000,000 24,000,000 12,000,000 8,000,000 18,000,000 14,000,000 18,000,000 18,000,000 4,000,000 6,000,000 10,000,000 17,000,000 13,000,000 
      total revenues and other income
    34,568,000,000 33,422,000,000 35,849,000,000 34,101,000,000 31,850,000,000 33,466,000,000 35,373,000,000 38,362,000,000 33,211,000,000 36,823,000,000 41,583,000,000 36,824,000,000 35,077,000,000 40,093,000,000 47,237,000,000 54,238,000,000 38,384,000,000 35,608,000,000 32,613,000,000 29,827,000,000 22,882,000,000 18,187,000,000 17,548,000,000 15,198,000,000 24,080,000,000 31,308,000,000 31,202,000,000 33,688,000,000 28,615,000,000 32,541,000,000 23,132,000,000 22,445,000,000 18,984,000,000 21,236,000,000 19,386,000,000 18,354,000,000 16,393,000,000 17,284,000,000 16,460,000,000 16,790,000,000 12,830,000,000 15,679,000,000 18,758,000,000 20,581,000,000 17,240,000,000 22,343,000,000 25,481,000,000 26,933,000,000 23,345,000,000 24,932,000,000 26,274,000,000 25,703,000,000 23,345,000,000 20,711,000,000 21,249,000,000 20,257,000,000 20,275,000,000 19,441,000,000 20,653,000,000 20,794,000,000 
      yoy
    8.53% -0.13% 1.35% -11.11% -4.10% -9.12% -14.93% 4.18% -5.32% -8.16% -11.97% -32.11% -8.62% 12.60% 44.84% 81.84% 67.75% 95.79% 85.85% 96.26% -4.98% -41.91% -43.76% -54.89% -15.85% -3.79% 34.89% 50.09% 50.73% 53.24% 19.32% 22.29% 15.81% 22.87% 17.78% 9.32% 27.77% 10.24% -12.25% -18.42% -25.58% -29.83% -26.38% -23.58% -26.15% -10.38% -3.02% 4.79% 0.00% 20.38% 23.65% 26.88% 15.14% 6.53% 2.89% -2.58%     
      qoq
    3.43% -6.77% 5.13% 7.07% -4.83% -5.39% -7.79% 15.51% -9.81% -11.45% 12.92% 4.98% -12.51% -15.12% -12.91% 41.30% 7.80% 9.18% 9.34% 30.35% 25.82% 3.64% 15.46% -36.89% -23.09% 0.34% -7.38% 17.73% -12.06% 40.68% 3.06% 18.23% -10.60% 9.54% 5.62% 11.96% -5.16% 5.01% -1.97% 30.87% -18.17% -16.41% -8.86% 19.38% -22.84% -12.32% -5.39% 15.37% -6.37% -5.11% 2.22% 10.10% 12.72% -2.53% 4.90% -0.09% 4.29% -5.87% -0.68%  
      costs and expenses:
                                                                
      cost of revenues
    31,261,000,000 28,861,000,000 31,200,000,000 30,025,000,000 29,360,000,000 30,558,000,000 32,144,000,000 33,945,000,000 29,593,000,000 32,582,000,000 34,928,000,000 31,762,000,000 29,294,000,000 33,575,000,000 38,821,000,000 44,207,000,000 35,068,000,000 32,184,000,000 29,563,000,000 27,177,000,000 21,084,000,000 17,216,000,000 16,673,000,000 13,777,000,000 22,821,000,000 27,301,000,000 27,300,000,000 29,682,000,000 25,756,000,000 28,112,000,000 20,457,000,000 19,517,000,000 17,370,000,000 16,847,000,000 14,605,000,000 14,175,000,000 13,133,000,000 13,695,000,000 12,944,000,000 12,830,000,000 9,701,000,000 12,008,000,000 14,165,000,000 16,366,000,000 13,044,000,000 18,199,000,000 21,935,000,000 23,096,000,000 20,540,000,000 21,494,000,000 23,553,000,000 22,320,000,000 20,034,000,000 17,380,000,000 17,190,000,000 16,789,000,000 17,309,000,000 17,641,000,000 16,896,000,000 16,654,000,000 
      gross profit
    3,307,000,000 4,561,000,000 4,649,000,000 4,076,000,000 2,490,000,000 2,908,000,000 3,229,000,000 4,417,000,000 3,618,000,000 4,241,000,000 6,655,000,000 5,062,000,000 5,783,000,000 6,518,000,000 8,416,000,000 10,031,000,000 3,316,000,000 3,424,000,000 3,050,000,000 2,650,000,000 1,798,000,000 971,000,000 875,000,000 1,421,000,000 1,259,000,000 4,007,000,000 3,902,000,000 4,006,000,000 2,859,000,000 4,429,000,000 2,675,000,000 2,928,000,000 1,614,000,000 4,389,000,000 4,781,000,000 4,179,000,000 3,260,000,000 3,589,000,000 3,516,000,000 3,960,000,000 3,129,000,000 3,671,000,000 4,593,000,000 4,215,000,000 4,196,000,000 4,144,000,000 3,546,000,000 3,837,000,000 2,805,000,000 3,438,000,000 2,721,000,000 3,383,000,000 3,311,000,000 3,331,000,000 4,059,000,000 3,468,000,000 2,966,000,000 1,800,000,000 3,757,000,000 4,140,000,000 
      yoy
    32.81% 56.84% 43.98% -7.72% -31.18% -31.43% -51.48% -12.74% -37.44% -34.93% -20.92% -49.54% 74.40% 90.36% 175.93% 278.53% 84.43% 252.63% 248.57% 86.49% 42.81% -75.77% -77.58% -64.53% -55.96% -9.53% 45.87% 36.82% 77.14% 0.91% -44.05% -29.94% -50.49% 22.29% 35.98% 5.53% 4.19% -2.23% -23.45% -6.05% -25.43% -11.41% 29.53% 9.85% 49.59% 20.54% 30.32% 13.42% -15.28% 3.21% -32.96% -2.45% 11.63% 85.06% 8.04% -16.23%     
      qoq
    -27.49% -1.89% 14.06% 63.69% -14.37% -9.94% -26.90% 22.08% -14.69% -36.27% 31.47% -12.47% -11.28% -22.55% -16.10% 202.50% -3.15% 12.26% 15.09% 47.39% 85.17% 10.97% -38.42% 12.87% -68.58% 2.69% -2.60% 40.12% -35.45% 65.57% -8.64% 81.41% -63.23% -8.20% 14.41% 28.19% -9.17% 2.08% -11.21% 26.56% -14.76% -20.07% 8.97% 0.45% 1.25% 16.86% -7.58% 36.79% -18.41% 26.35% -19.57% 2.17% -0.60% -17.94% 17.04% 16.93% 64.78% -52.09% -9.25%  
      gross margin %
    9.57% 13.65% 12.97% 11.95% 7.82% 8.69% 9.13% 11.51% 10.89% 11.52% 16.00% 13.75% 16.49% 16.26% 17.82% 18.49% 8.64% 9.62% 9.35% 8.88% 7.86% 5.34% 4.99% 9.35% 5.23% 12.80% 12.51% 11.89% 9.99% 13.61% 11.56% 13.05% 8.50% 20.67% 24.66% 22.77% 19.89% 20.76% 21.36% 23.59% 24.39% 23.41% 24.49% 20.48% 24.34% 18.55% 13.92% 14.25% 12.02% 13.79% 10.36% 13.16% 14.18% 16.08% 19.10% 17.12% 14.63% 9.26% 18.19% 19.91% 
      depreciation and amortization
    809,000,000 828,000,000 841,000,000 789,000,000 793,000,000 826,000,000 846,000,000 838,000,000 827,000,000 828,000,000 845,000,000 834,000,000 800,000,000 797,000,000 794,000,000 819,000,000 805,000,000 813,000,000 836,000,000 871,000,000 844,000,000 849,000,000 830,000,000 935,000,000 962,000,000 978,000,000 855,000,000 886,000,000 919,000,000 874,000,000 555,000,000 533,000,000 528,000,000 540,000,000 517,000,000 521,000,000 536,000,000 504,000,000 507,000,000 500,000,000 490,000,000 413,000,000 508,000,000 362,000,000 363,000,000 359,000,000 322,000,000 325,000,000 320,000,000 332,000,000 299,000,000 302,000,000 287,000,000 283,000,000 246,000,000 236,000,000 230,000,000 230,000,000 227,000,000 218,000,000 
      selling, general and administrative expenses
    867,000,000 836,000,000 863,000,000 867,000,000 783,000,000 804,000,000 815,000,000 823,000,000 779,000,000 820,000,000 824,000,000 704,000,000 691,000,000 763,000,000 712,000,000 694,000,000 603,000,000 656,000,000 681,000,000 625,000,000 575,000,000 630,000,000 673,000,000 746,000,000 821,000,000 790,000,000 833,000,000 904,000,000 881,000,000 1,147,000,000 445,000,000 424,000,000 402,000,000 457,000,000 412,000,000 485,000,000 389,000,000 406,000,000 420,000,000 401,000,000 378,000,000 433,000,000 392,000,000 393,000,000 358,000,000 371,000,000 342,000,000 316,000,000 346,000,000 336,000,000 305,000,000 358,000,000 249,000,000 279,000,000 305,000,000 376,000,000 263,000,000 302,000,000 299,000,000 288,000,000 
      other taxes
    227,000,000 203,000,000 232,000,000 223,000,000 227,000,000 137,000,000 219,000,000 234,000,000 228,000,000 198,000,000 233,000,000 219,000,000 231,000,000 219,000,000 224,000,000 190,000,000 192,000,000 177,000,000 193,000,000 189,000,000 162,000,000 122,000,000 178,000,000 214,000,000 251,000,000 201,000,000 190,000,000 174,000,000 186,000,000 209,000,000 123,000,000 122,000,000 103,000,000 115,000,000 116,000,000 115,000,000 108,000,000 103,000,000 112,000,000 111,000,000 109,000,000 95,000,000 95,000,000 104,000,000 97,000,000 102,000,000 86,000,000 98,000,000 104,000,000 81,000,000 82,000,000 88,000,000 89,000,000 66,000,000 66,000,000 64,000,000 74,000,000 49,000,000 63,000,000 59,000,000 
      total costs and expenses
    33,164,000,000 30,728,000,000 33,136,000,000 31,904,000,000 31,163,000,000 32,325,000,000 34,024,000,000 35,840,000,000 31,427,000,000 34,428,000,000 36,830,000,000 33,519,000,000 31,016,000,000 35,354,000,000 40,551,000,000 45,910,000,000 36,668,000,000 33,830,000,000 31,273,000,000 28,862,000,000 22,665,000,000 17,797,000,000 18,605,000,000 14,217,000,000 35,897,000,000 30,467,000,000 29,178,000,000 31,646,000,000 27,946,000,000 30,524,000,000 21,729,000,000 20,734,000,000 18,544,000,000 20,117,000,000 17,810,000,000 17,372,000,000 16,101,000,000 16,731,000,000 16,025,000,000 15,475,000,000 12,755,000,000 15,341,000,000 17,209,000,000 19,246,000,000 15,770,000,000 21,084,000,000 24,419,000,000 25,564,000,000 22,984,000,000 23,924,000,000 25,973,000,000 24,743,000,000 22,189,000,000 19,522,000,000 19,354,000,000 18,950,000,000 19,319,000,000 19,599,000,000 18,894,000,000 19,469,000,000 
      income from operations
    1,404,000,000 2,694,000,000 2,713,000,000 2,197,000,000 687,000,000 1,413,750,000 1,349,000,000 2,522,000,000 1,784,000,000 3,029,750,000 4,753,000,000 3,305,000,000 4,061,000,000           981,000,000 -11,817,000,000 841,000,000 2,024,000,000 2,042,000,000 669,000,000 2,017,000,000 1,403,000,000 1,711,000,000 440,000,000 1,119,000,000 1,576,000,000 982,000,000 292,000,000 553,000,000 435,000,000 1,315,000,000 75,000,000 338,000,000 1,549,000,000 1,335,000,000 1,470,000,000 1,259,000,000 1,062,000,000 1,369,000,000 361,000,000 1,008,000,000 301,000,000 960,000,000 1,156,000,000 1,189,000,000 1,895,000,000 1,307,000,000 956,000,000 -158,000,000 1,759,000,000 1,325,000,000 
      yoy
    104.37% 90.56% 101.11% -12.89% -61.49% -53.34% -71.62% -23.69% -56.07%               -51.96% -1866.37% -58.30% 44.26% 19.35% 52.05% 80.25% -10.98% 74.24% 50.68% 102.35% 262.30% -25.32% 289.33% 63.61% -71.92% -1.50% -94.90% -73.15% 45.86% -2.48% 307.20% 24.90% 252.82% 42.60% -68.77% -15.22% -84.12% -26.55% 20.92% -852.53% 7.73% -1.36%     
      qoq
    -47.88% -0.70% 23.49% 219.80% -51.41% 4.80% -46.51% 41.37% -41.12% -36.26% 43.81% -18.62%            -108.30% -1505.11% -58.45% -0.88% 205.23% -66.83% 43.76% -18.00% 288.86% -60.68% -29.00% 60.49% 236.30% -47.20% 27.13% -66.92% 1653.33% -77.81% -78.18% 16.03% -9.18% 16.76% 18.55% -22.43% 279.22% -64.19% 234.88% -68.65% -16.96% -2.78% -37.26% 44.99% 36.72% -705.06% -108.98% 32.75%  
      operating margin %
    4.06% 8.06% 7.57% 6.44% 2.16% 4.22% 3.81% 6.57% 5.37% 8.23% 11.43% 8.98% 11.58% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 6.45% -49.07% 2.69% 6.49% 6.06% 2.34% 6.20% 6.07% 7.62% 2.32% 5.27% 8.13% 5.35% 1.78% 3.20% 2.64% 7.83% 0.58% 2.16% 8.26% 6.49% 8.53% 5.63% 4.17% 5.08% 1.55% 4.04% 1.15% 3.73% 4.95% 5.74% 8.92% 6.45% 4.72% -0.81% 8.52% 6.37% 
      net interest and other financial costs
    370,000,000 343,000,000 310,000,000 319,000,000 304,000,000 245,000,000 221,000,000 194,000,000 179,000,000 111,000,000 118,000,000 142,000,000 154,000,000 186,000,000 240,000,000 312,000,000 262,000,000 430,000,000 328,000,000 372,000,000 353,000,000 333,000,000 359,000,000 345,000,000 338,000,000 302,000,000 317,000,000 322,000,000 306,000,000 385,000,000 240,000,000 195,000,000 183,000,000                            
      income before income taxes
    1,034,000,000 2,351,000,000 2,403,000,000 1,878,000,000 383,000,000 1,265,250,000 1,128,000,000 2,328,000,000 1,605,000,000 2,926,250,000 4,635,000,000 3,163,000,000 3,907,000,000           636,000,000 -12,155,000,000 539,000,000 1,707,000,000 1,720,000,000 363,000,000 1,632,000,000 1,163,000,000 1,516,000,000 257,000,000 959,000,000 1,419,000,000 824,000,000 142,000,000 417,000,000 294,000,000 1,178,000,000 -67,000,000 235,000,000 1,479,000,000 1,271,000,000 1,389,000,000 1,187,000,000 1,012,000,000 1,321,000,000 315,000,000 969,000,000 254,000,000 915,000,000 1,108,000,000 1,144,000,000 1,870,000,000 1,290,000,000 934,000,000 -180,000,000 1,744,000,000 1,333,000,000 
      provision for income taxes
    183,000,000 372,000,000 460,000,000 268,000,000 37,000,000 194,750,000 113,000,000 373,000,000 293,000,000 602,500,000 1,004,000,000 583,000,000 823,000,000           360,000,000 -1,937,000,000 277,000,000 340,000,000 353,000,000 104,000,000   281,000,000    250,000,000  120,250,000 75,000,000      486,000,000   457,000,000        476,000,000 338,000,000 -105,000,000 611,000,000 531,000,000 
      net income
    851,000,000 1,979,000,000 1,943,000,000 1,610,000,000 346,000,000 785,000,000 1,015,000,000 1,955,000,000 1,312,000,000 1,877,000,000 3,631,000,000 2,580,000,000 3,084,000,000 3,641,000,000 5,020,000,000 6,217,000,000 1,172,000,000 1,105,000,000 1,030,000,000 8,802,000,000 64,000,000 574,000,000 -609,000,000 276,000,000 -10,218,000,000 262,000,000 1,367,000,000 1,367,000,000 259,000,000 1,195,000,000 941,000,000 1,235,000,000 235,000,000 2,125,000,000 1,004,000,000 574,000,000 101,000,000 289,000,000 219,000,000 783,000,000 -78,000,000 168,000,000 958,000,000 839,000,000 903,000,000 805,000,000 679,000,000 864,000,000 207,000,000 631,000,000 173,000,000 599,000,000 730,000,000 759,000,000 1,224,000,000 814,000,000 596,000,000 -75,000,000 1,133,000,000 802,000,000 
      yoy
    145.95% 152.10% 91.43% -17.65% -73.63% -58.18% -72.05% -24.22% -57.46% -48.45% -27.67% -58.50% 163.14% 229.50% 387.38% -29.37% 1731.25% 92.51% -269.13% 3089.13% -100.63% 119.08% -144.55% -79.81% -4045.17% -78.08% 45.27% 10.69% 10.21% -43.76% -6.27% 115.16% 132.67% 635.29% 358.45% -26.69% -229.49% 72.02% -77.14% -6.67% -108.64% -79.13% 41.09% -2.89% 336.23% 27.58% 292.49% 44.24% -71.64% -16.86% -85.87% -26.41% 22.48% -1112.00% 8.03% 1.50%     
      qoq
    -57.00% 1.85% 20.68% 365.32% -55.92% -22.66% -48.08% 49.01% -30.10% -48.31% 40.74% -16.34% -15.30% -27.47% -19.25% 430.46% 6.06% 7.28% -88.30% 13653.13% -88.85% -194.25% -320.65% -102.70% -4000.00% -80.83% 0.00% 427.80% -78.33% 26.99% -23.81% 425.53% -88.94% 111.65% 74.91% 468.32% -65.05% 31.96% -72.03% -1103.85% -146.43% -82.46% 14.18% -7.09% 12.17% 18.56% -21.41% 317.39% -67.19% 264.74% -71.12% -17.95% -3.82% -37.99% 50.37% 36.58% -894.67% -106.62% 41.27%  
      net income margin %
    2.46% 5.92% 5.42% 4.72% 1.09% 2.35% 2.87% 5.10% 3.95% 5.10% 8.73% 7.01% 8.79% 9.08% 10.63% 11.46% 3.05% 3.10% 3.16% 29.51% 0.28% 3.16% -3.47% 1.82% -42.43% 0.84% 4.38% 4.06% 0.91% 3.67% 4.07% 5.50% 1.24% 10.01% 5.18% 3.13% 0.62% 1.67% 1.33% 4.66% -0.61% 1.07% 5.11% 4.08% 5.24% 3.60% 2.66% 3.21% 0.89% 2.53% 0.66% 2.33% 3.13% 3.66% 5.76% 4.02% 2.94% -0.39% 5.49% 3.86% 
      less net income attributable to:
                                                                
      noncontrolling interests
    340,000,000 444,000,000 573,000,000 394,000,000 420,000,000 408,000,000 387,000,000 435,000,000 365,000,000 403,000,000 326,000,000 331,000,000 337,000,000 297,000,000 520,000,000 323,000,000 306,000,000 310,000,000 298,000,000 269,000,000 286,000,000 269,000,000 257,000,000 246,000,000 -1,004,000,000 -201,000,000 252,000,000 240,000,000 246,000,000 224,000,000 185,000,000 160,000,000 182,000,000 93,000,000 85,000,000 74,000,000 55,000,000 46,000,000 58,000,000 -27,000,000                     
      net income attributable to mpc
    511,000,000 1,535,000,000 1,370,000,000 1,216,000,000 -74,000,000 371,000,000 622,000,000 1,515,000,000 937,000,000 1,451,000,000 3,280,000,000 2,226,000,000 2,724,000,000 3,321,000,000 4,477,000,000 5,873,000,000 845,000,000 774,000,000 694,000,000 8,512,000,000  285,000,000 -886,000,000 9,000,000  443,000,000 1,095,000,000 1,106,000,000 -7,000,000 951,000,000 737,000,000 1,055,000,000 37,000,000 2,016,000,000 903,000,000 483,000,000 30,000,000 227,000,000 145,000,000 801,000,000 1,000,000 187,000,000 948,000,000 826,000,000 891,000,000 798,000,000 672,000,000 855,000,000 199,000,000 626,000,000 168,000,000 593,000,000 725,000,000        
      per share data
                                                                
      basic:
                                                                
      net income attributable to mpc per share
    1.73 5.08 4.51 3.96 -0.24 2.213 1.88 4.34 2.59 4.915 8.31 5.34 6.13           0.01  0.69 1.67 1.67 -0.01 1.4 1.63 2.3 0.08 4.01 1.79 0.94 0.06 0.43 0.28 1.51 0.003 0.36 1.77 1.52 3.26 2.85 2.38 2.97 0.68 2.06 0.54 1.84 2.19        
      weighted-average shares outstanding
    295 305 303 307 313 340 331 349 361 407 394 417 444 512 491 532 564 634 633 650 651 649 650 650 648 659 656 662 673 518 451 459 476 507 504 513 525 528 527 528 529 538 535 541 273 285 282 287 293 315 309 322 331 340 338 340 348 356   
      diluted:
                                                                
      net gain on disposal of assets
     169,000,000 -2,000,000 6,000,000  11,000,000 -2,000,000 -1,000,000 20,000,000 91,000,000 110,000,000 13,000,000 3,000,000 -11,000,000 1,051,000,000 39,000,000 -18,000,000 18,000,000   3,000,000 64,000,000 1,000,000 2,000,000 4,000,000 85,000,000 4,000,000 4,000,000 214,000,000 17,000,000 1,000,000 3,000,000 2,000,000 -2,000,000  7,000,000 5,000,000 6,000,000 1,000,000  25,000,000 1,000,000 2,000,000 -1,000,000 5,000,000 7,000,000 2,000,000 11,000,000 1,000,000 3,000,000 1,000,000 1,000,000 1,000,000 -1,000,000 175,000,000 1,000,000 2,000,000 2,000,000 5,000,000 4,000,000 
      redeemable noncontrolling interest
         6,000,000 6,000,000 5,000,000 10,000,000 23,000,000 25,000,000 23,000,000 23,000,000 23,000,000 23,000,000 21,000,000 21,000,000 21,000,000 38,000,000 21,000,000 20,000,000 20,000,000 20,000,000 21,000,000 20,000,000 20,000,000 20,000,000 21,000,000 20,000,000 20,000,000 19,000,000 20,000,000 16,000,000 16,000,000 16,000,000 17,000,000 16,000,000 16,000,000 16,000,000 9,000,000                     
      income from continuing operations
                 4,739,000,000 6,686,000,000 8,328,000,000 1,716,000,000 1,778,000,000 1,340,000,000 965,000,000 217,000,000 390,000,000 -1,057,000,000                                      
      income from continuing operations before income taxes
                 4,553,000,000 6,446,000,000 8,016,000,000 1,454,000,000 1,348,000,000 1,012,000,000 593,000,000  57,000,000 -1,416,000,000                                      
      provision for income taxes on continuing operations
                 984,000,000 1,426,000,000 1,799,000,000 282,000,000 243,000,000 -18,000,000 5,000,000 34,000,000 -559,250,000 -436,000,000                                      
      income from continuing operations, net of tax
                 3,569,000,000 5,020,000,000 6,217,000,000 1,172,000,000 1,105,000,000 1,030,000,000 588,000,000  250,000,000 -980,000,000                                      
      income from discontinued operations, net of tax
                       8,214,000,000 234,000,000 324,000,000 371,000,000                                      
      continuing operations
                 6.99 9.12 11.03 1.5 1.23 1.1 0.46 -0.73 -0.06 -1.93                                      
      discontinued operations
                     0.21  12.63 0.36 0.51 0.57                                      
      net income per share
                 7.13 9.12 11.03 1.5 1.44 1.1 13.09 -0.37 0.45 -1.36                               1.923 3.61 2.39 1.71    
      lcm inventory valuation adjustment
                         296,250,000 -530,000,000 -1,480,000,000                                     
      impairment expense
                         146,000,000 433,000,000 25,000,000 7,822,000,000               1,000,000 129,000,000                    
      restructuring expenses
                         19,000,000 348,000,000                                      
      loss from continuing operations before income taxes
                        -136,000,000                                        
      loss from continuing operations, net of tax
                        -170,000,000                                        
      net loss attributable to mpc
                        -242,000,000    -9,234,000,000                                    
      inventory market valuation adjustment
                            3,220,000,000               -385,000,000                     
      net loss attributable to mpc per share
                            -14.25                                    
      sales to related parties
                                186,000,000 182,000,000 201,000,000 199,000,000 172,000,000 171,000,000 157,000,000 147,000,000              1,000,000 3,000,000 2,000,000 2,000,000 2,000,000 2,000,000 3,000,000 1,000,000 2,000,000 2,000,000 28,000,000 
      purchases from related parties
                                204,000,000 182,000,000 149,000,000 138,000,000 141,000,000 150,000,000 148,000,000 150,000,000 122,000,000 150,000,000 128,000,000 124,000,000 107,000,000 89,000,000 61,000,000 82,000,000 76,000,000 104,000,000 112,000,000 130,000,000 159,000,000 103,000,000 103,000,000 79,000,000 72,000,000 76,000,000 84,000,000 57,000,000 63,000,000 70,000,000 80,000,000 981,000,000 
      benefit from income taxes
                                 131,250,000 222,000,000  22,000,000 176,500,000 415,000,000  41,000,000   395,000,000 11,000,000 67,000,000 521,000,000 432,000,000  382,000,000 333,000,000  108,000,000 338,000,000 81,000,000 316,000,000 378,000,000 385,000,000 646,000,000      
      dividends paid
                                   0.46 0.46 0.4 0.4 0.36 0.36 0.36 0.36 0.32 0.32 0.32 0.32 0.25 0.5 0.5 0.5 0.42 0.42 0.42 0.42 0.35 0.35 0.35 0.35 0.25 0.25 0.25 0.2  
      consumer excise taxes
                                     2,008,000,000 2,012,000,000 1,926,000,000 1,813,000,000 1,873,000,000 1,914,000,000 1,893,000,000 1,826,000,000 1,933,000,000 1,988,000,000 1,939,000,000 1,832,000,000 1,949,000,000 1,622,000,000 1,599,000,000 1,515,000,000 1,578,000,000 1,631,000,000 1,596,000,000 1,458,000,000 1,438,000,000 1,463,000,000 1,428,000,000 1,380,000,000 1,307,000,000 1,329,000,000 1,269,000,000 
      net interest and other financial income
                                     -160,000,000 -157,000,000 -158,000,000 -150,000,000 -136,000,000 -141,000,000 -137,000,000 -142,000,000 -103,000,000 -70,000,000 -64,000,000 -81,000,000 -72,000,000 -50,000,000 -48,000,000 -46,000,000 -39,000,000 -47,000,000 -45,000,000 -48,000,000 -45,000,000 -26,000,000 -17,000,000 -22,000,000 -22,000,000 -15,000,000 -10,000,000 
      inventory market valuation charge
                                            15,000,000                    
      less net income attributable to noncontrolling interests
                                            -79,000,000 -19,000,000 10,000,000 13,000,000 12,000,000 7,000,000 7,000,000 9,000,000 8,000,000 5,000,000 5,000,000 6,000,000 5,000,000        
      related party net interest and other financial income
                                                          1,000,000     18,000,000 
    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 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 
                                                                  
        assets
                                                                  
        cash and cash equivalents
      2,151,000,000 3,672,000,000 2,654,000,000 1,673,000,000 3,812,000,000 3,210,000,000 4,002,000,000 4,441,000,000 3,175,000,000 5,443,000,000 8,452,000,000 7,345,000,000 7,960,000,000 8,625,000,000 7,376,000,000 9,078,000,000 7,148,000,000 5,291,000,000 5,874,000,000 11,839,000,000 624,000,000 415,000,000 618,000,000 1,091,000,000 1,690,000,000 1,527,000,000 1,525,000,000 1,247,000,000 877,000,000 1,687,000,000 4,992,000,000 4,999,000,000 4,653,000,000 3,011,000,000 2,088,000,000 1,450,000,000 2,167,000,000 887,000,000 709,000,000 1,754,000,000 308,000,000 1,127,000,000 2,044,000,000 1,881,000,000 2,078,000,000 1,494,000,000 1,854,000,000 2,125,000,000 2,166,000,000 2,292,000,000 2,018,000,000 3,069,000,000 4,737,000,000 4,860,000,000 3,387,000,000 1,895,000,000 2,205,000,000 3,079,000,000 2,957,000,000 1,622,000,000 
        receivables, less allowance for expected credit loss of 16 and 20, respectively
      14,629,000,000                                                            
        inventories
      10,764,000,000 10,129,000,000 9,829,000,000 10,106,000,000 10,488,000,000 9,568,000,000 9,886,000,000 9,800,000,000 9,781,000,000 9,317,000,000 10,143,000,000 9,536,000,000 10,268,000,000 8,827,000,000 9,834,000,000 11,048,000,000 9,482,000,000 8,055,000,000 9,211,000,000 8,879,000,000 8,407,000,000 7,999,000,000 7,403,000,000 8,086,000,000 7,445,000,000 10,243,000,000 9,696,000,000 9,088,000,000 9,833,000,000 9,837,000,000 5,339,000,000 5,485,000,000 5,111,000,000 5,550,000,000 5,493,000,000 5,548,000,000 5,392,000,000 5,656,000,000 5,524,000,000 5,209,000,000 4,983,000,000 5,225,000,000 5,556,000,000 5,540,000,000 5,437,000,000 5,642,000,000 5,608,000,000 5,621,000,000 5,689,000,000 4,689,000,000 5,714,000,000 4,830,000,000 4,879,000,000 3,449,000,000 3,889,000,000 4,030,000,000 3,352,000,000 3,320,000,000 3,615,000,000 3,679,000,000 
        other current assets
      1,154,000,000 662,000,000 626,000,000 821,000,000 726,000,000 524,000,000 740,000,000 741,000,000 734,000,000 971,000,000 607,000,000 949,000,000 623,000,000 1,168,000,000 858,000,000 741,000,000 648,000,000 568,000,000 2,175,000,000 2,685,000,000 2,695,000,000 2,724,000,000 2,199,000,000 1,105,000,000 975,000,000 528,000,000 457,000,000 458,000,000 548,000,000 646,000,000 134,000,000 145,000,000 148,000,000 145,000,000 150,000,000 186,000,000 199,000,000 241,000,000 176,000,000 142,000,000 204,000,000 192,000,000 137,000,000 134,000,000 174,000,000 145,000,000 154,000,000 125,000,000 173,000,000 197,000,000 206,000,000 190,000,000 172,000,000 110,000,000 139,000,000 73,000,000 156,000,000 141,000,000 183,000,000 170,000,000 
        total current assets
      28,698,000,000 24,780,000,000 24,630,000,000 23,728,000,000 27,140,000,000 24,447,000,000 25,949,000,000 31,347,000,000 31,260,000,000 32,131,000,000 36,275,000,000 32,213,000,000 32,486,000,000 35,242,000,000 35,285,000,000 42,413,000,000 36,388,000,000 30,496,000,000 34,143,000,000 38,592,000,000 30,361,000,000 28,287,000,000 26,200,000,000 14,643,000,000 15,693,000,000 20,170,000,000 19,139,000,000 18,396,000,000 18,151,000,000 18,023,000,000 15,873,000,000 15,548,000,000 14,525,000,000 13,401,000,000 11,631,000,000 10,443,000,000 11,042,000,000 10,401,000,000 9,545,000,000 10,304,000,000 8,097,000,000 9,471,000,000 10,861,000,000 11,431,000,000 11,053,000,000 11,339,000,000 12,887,000,000 13,596,000,000 13,448,000,000 12,737,000,000 13,531,000,000 14,252,000,000 15,297,000,000 13,029,000,000 12,516,000,000 10,706,000,000 11,580,000,000 12,001,000,000 11,669,000,000 10,513,000,000 
        equity method investments
      6,999,000,000 6,795,000,000 6,900,000,000 7,294,000,000 7,095,000,000 6,857,000,000 6,976,000,000 6,821,000,000 6,831,000,000 6,260,000,000 6,521,000,000 6,665,000,000 6,626,000,000 6,466,000,000 6,493,000,000 5,508,000,000 5,514,000,000 5,409,000,000 5,384,000,000 5,424,000,000 5,435,000,000 5,422,000,000 5,462,000,000 5,740,000,000 5,656,000,000 6,898,000,000 6,725,000,000 6,729,000,000 6,558,000,000 5,898,000,000 4,910,000,000 4,838,000,000 4,817,000,000 4,787,000,000 4,769,000,000 4,823,000,000 4,704,000,000 3,827,000,000 3,554,000,000 3,793,000,000 3,807,000,000 3,622,000,000 1,073,000,000 994,000,000 902,000,000 865,000,000 862,000,000 690,000,000 602,000,000 463,000,000 417,000,000 328,000,000 327,000,000 321,000,000 300,000,000 302,000,000 302,000,000 302,000,000 321,000,000 323,000,000 
        property, plant and equipment
      37,597,000,000 37,397,000,000 36,984,000,000 34,805,000,000 34,943,000,000 35,028,000,000 34,542,000,000 34,686,000,000 34,963,000,000 35,112,000,000 34,690,000,000 35,059,000,000 35,391,000,000 35,657,000,000 35,384,000,000 37,062,000,000 37,145,000,000 37,440,000,000 37,630,000,000 37,996,000,000 38,491,000,000 39,035,000,000 39,757,000,000 45,025,000,000 45,333,000,000 45,615,000,000 45,034,000,000 45,335,000,000 45,091,000,000 45,058,000,000 27,717,000,000 26,931,000,000 26,618,000,000 26,443,000,000 26,036,000,000 25,786,000,000 25,669,000,000 25,765,000,000 25,697,000,000 25,512,000,000 25,319,000,000 25,164,000,000 16,294,000,000 16,283,000,000 16,241,000,000 16,261,000,000 15,999,000,000 13,850,000,000 13,854,000,000 13,921,000,000 13,795,000,000 13,799,000,000 13,850,000,000 12,643,000,000 12,532,000,000 12,414,000,000 12,246,000,000 12,228,000,000 12,026,000,000 11,935,000,000 
        goodwill
      9,335,000,000 9,354,000,000 9,331,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,244,000,000 8,256,000,000 8,256,000,000 8,256,000,000 8,256,000,000 8,256,000,000 8,256,000,000 8,256,000,000 12,710,000,000 12,710,000,000 20,040,000,000 21,277,000,000 20,277,000,000 20,229,000,000 20,184,000,000 3,713,000,000 3,586,000,000 3,586,000,000 3,586,000,000 3,586,000,000 3,586,000,000 3,586,000,000 3,587,000,000 3,648,000,000 3,648,000,000 3,649,000,000 4,019,000,000 1,565,000,000 1,566,000,000 1,566,000,000 1,566,000,000 1,537,000,000 937,000,000 938,000,000 938,000,000 938,000,000 938,000,000 930,000,000 930,000,000 930,000,000 925,000,000 842,000,000 842,000,000 842,000,000 842,000,000 
        intangibles
      2,658,000,000 2,714,000,000 2,749,000,000                                                          
        right of use assets
      1,507,000,000 1,493,000,000 1,373,000,000 1,399,000,000 1,249,000,000 1,300,000,000 1,192,000,000 1,187,000,000 1,255,000,000 1,233,000,000 1,310,000,000 1,288,000,000 1,269,000,000 1,214,000,000 1,200,000,000 1,276,000,000 1,331,000,000 1,372,000,000 1,424,000,000 1,500,000,000 1,514,000,000 1,521,000,000 1,640,000,000 2,454,000,000 2,562,000,000 2,459,000,000 2,522,000,000 2,588,000,000 2,680,000,000                                
        other noncurrent assets
      1,393,000,000 1,422,000,000 1,273,000,000 3,014,000,000 2,962,000,000 2,982,000,000 2,930,000,000 2,944,000,000 2,975,000,000 3,007,000,000 2,929,000,000 2,973,000,000 3,021,000,000 3,081,000,000 3,088,000,000 2,234,000,000 2,318,000,000 2,400,000,000 2,463,000,000 2,532,000,000 2,594,000,000 2,637,000,000 2,705,000,000 4,021,000,000 4,363,000,000 3,374,000,000 3,442,000,000 3,571,000,000 3,727,000,000 3,777,000,000 818,000,000 833,000,000 818,000,000 830,000,000 784,000,000 809,000,000 820,000,000 833,000,000 849,000,000 876,000,000 886,000,000 839,000,000 368,000,000 379,000,000 420,000,000 429,000,000 420,000,000 303,000,000 317,000,000 326,000,000 322,000,000 378,000,000 369,000,000 300,000,000 305,000,000 334,000,000 336,000,000 372,000,000 367,000,000 351,000,000 
        total assets
      88,187,000,000 83,955,000,000 83,240,000,000 78,484,000,000 81,633,000,000 78,858,000,000 79,833,000,000 85,229,000,000 85,528,000,000 85,987,000,000 89,969,000,000 86,442,000,000 87,037,000,000 89,904,000,000 89,694,000,000 96,737,000,000 90,952,000,000 85,373,000,000 89,300,000,000 94,300,000,000 86,651,000,000 85,158,000,000 84,020,000,000 84,593,000,000 86,317,000,000 98,556,000,000 98,139,000,000 96,896,000,000 96,436,000,000 92,940,000,000 53,031,000,000 51,736,000,000 50,364,000,000 49,047,000,000 46,806,000,000 45,447,000,000 45,821,000,000 44,413,000,000 43,293,000,000 44,133,000,000 41,758,000,000 43,115,000,000 30,161,000,000 30,653,000,000 30,182,000,000 30,460,000,000 31,705,000,000 29,376,000,000 29,159,000,000 28,385,000,000 29,003,000,000 29,695,000,000 30,773,000,000 27,223,000,000 26,583,000,000 24,681,000,000 25,306,000,000 25,745,000,000 25,225,000,000 23,964,000,000 
        liabilities
                                                                  
        accounts payable
      17,617,000,000 12,974,000,000 12,486,000,000 13,345,000,000 14,748,000,000 13,906,000,000 12,763,000,000 14,865,000,000 15,471,000,000 13,761,000,000 15,839,000,000 13,052,000,000 13,031,000,000 15,312,000,000 16,682,000,000 22,502,000,000 19,791,000,000 13,700,000,000 12,196,000,000 12,170,000,000 9,953,000,000 7,803,000,000 6,701,000,000 6,110,000,000 8,106,000,000 11,623,000,000 11,380,000,000 10,905,000,000 10,568,000,000 9,366,000,000 8,016,000,000 8,113,000,000 7,066,000,000 8,297,000,000 6,159,000,000 5,307,000,000 5,343,000,000 5,593,000,000 5,055,000,000 5,214,000,000 4,083,000,000 4,743,000,000 4,993,000,000 6,225,000,000 5,387,000,000 6,661,000,000 8,726,000,000 8,934,000,000 9,313,000,000 8,234,000,000 8,961,000,000 8,601,000,000 8,872,000,000 6,785,000,000 6,951,000,000 6,155,000,000 7,803,000,000 8,169,000,000 6,974,000,000 7,313,000,000 
        payroll and benefits payable
      1,208,000,000 1,107,000,000 968,000,000 756,000,000 1,155,000,000 1,096,000,000 967,000,000 766,000,000 1,180,000,000 1,115,000,000 979,000,000 712,000,000 636,000,000 967,000,000 773,000,000 619,000,000 976,000,000 911,000,000 808,000,000 651,000,000 501,000,000 732,000,000 878,000,000 815,000,000 1,107,000,000 1,126,000,000 939,000,000 778,000,000 958,000,000 1,152,000,000 493,000,000 432,000,000 337,000,000 591,000,000 459,000,000 395,000,000 528,000,000 530,000,000 439,000,000 366,000,000 302,000,000 503,000,000 417,000,000 369,000,000 474,000,000 427,000,000 345,000,000 286,000,000 259,000,000 406,000,000 341,000,000 284,000,000 316,000,000 364,000,000 287,000,000 225,000,000 261,000,000 312,000,000 267,000,000 222,000,000 
        accrued taxes
      1,632,000,000 1,484,000,000 1,381,000,000 1,414,000,000 1,265,000,000 1,204,000,000 1,302,000,000 1,680,000,000 1,243,000,000 1,221,000,000 1,319,000,000 1,160,000,000 1,617,000,000 1,140,000,000 1,042,000,000 2,584,000,000 1,691,000,000 1,231,000,000 2,114,000,000 5,219,000,000 1,034,000,000 1,105,000,000 1,023,000,000 1,272,000,000 1,098,000,000 1,186,000,000 1,015,000,000 1,223,000,000 1,529,000,000 1,446,000,000 657,000,000 713,000,000 639,000,000 169,000,000 361,000,000 177,000,000 135,000,000 153,000,000 163,000,000 336,000,000 145,000,000 184,000,000 845,000,000 517,000,000 933,000,000 647,000,000 586,000,000 909,000,000 614,000,000 513,000,000 609,000,000 612,000,000 965,000,000 598,000,000 709,000,000 604,000,000 582,000,000 558,000,000 983,000,000  
        debt due within one year
      2,119,000,000 2,371,000,000 1,612,000,000 1,819,000,000 4,065,000,000 3,049,000,000 4,167,000,000 4,903,000,000 2,457,000,000 1,954,000,000 819,000,000 72,000,000 75,000,000 1,066,000,000 1,064,000,000 1,087,000,000 1,075,000,000 571,000,000 73,000,000 70,000,000 1,786,000,000 2,854,000,000 2,500,000,000 1,715,000,000 1,710,000,000 711,000,000 557,000,000 554,000,000 550,000,000 544,000,000 26,000,000 26,000,000 26,000,000 624,000,000 29,000,000 29,000,000 28,000,000 28,000,000 28,000,000 27,000,000 215,000,000                    
        operating lease liabilities
      501,000,000 489,000,000 441,000,000 446,000,000 410,000,000 417,000,000 485,000,000 463,000,000 472,000,000 454,000,000 453,000,000 423,000,000 404,000,000 368,000,000 355,000,000 391,000,000 420,000,000 438,000,000 444,000,000 473,000,000 475,000,000 497,000,000 531,000,000 625,000,000 630,000,000 604,000,000 586,000,000 615,000,000 613,000,000                                
        other current liabilities
      1,334,000,000 1,253,000,000 1,610,000,000 1,475,000,000 1,082,000,000 1,155,000,000 1,384,000,000 1,323,000,000 964,000,000 1,645,000,000 2,326,000,000 2,047,000,000 1,294,000,000 1,167,000,000 1,398,000,000 1,254,000,000 1,167,000,000 1,047,000,000 1,263,000,000 929,000,000 744,000,000 822,000,000 900,000,000 967,000,000 918,000,000 897,000,000 862,000,000 815,000,000 929,000,000 708,000,000 442,000,000 431,000,000 304,000,000 296,000,000 268,000,000 376,000,000 350,000,000 378,000,000 326,000,000 359,000,000 391,000,000 426,000,000 309,000,000 365,000,000 321,000,000 354,000,000 324,000,000 519,000,000 265,000,000 275,000,000 190,000,000 315,000,000 152,000,000 112,000,000 77,000,000 204,000,000 201,000,000 180,000,000 125,000,000 247,000,000 
        total current liabilities
      24,411,000,000 19,678,000,000 18,728,000,000 19,255,000,000 22,725,000,000 20,827,000,000 21,068,000,000 24,000,000,000 21,787,000,000 20,150,000,000 21,735,000,000 17,466,000,000 17,057,000,000 20,020,000,000 21,314,000,000 28,437,000,000 25,120,000,000 17,898,000,000 16,898,000,000 19,512,000,000 16,085,000,000 15,663,000,000 14,246,000,000 11,504,000,000 13,569,000,000 16,147,000,000 15,339,000,000 14,890,000,000 15,147,000,000 13,216,000,000 9,634,000,000 9,715,000,000 8,372,000,000 10,478,000,000 7,647,000,000 6,758,000,000 6,866,000,000 7,146,000,000 6,340,000,000 6,782,000,000 5,595,000,000 6,345,000,000 7,686,000,000 8,725,000,000 8,346,000,000 8,579,000,000 10,372,000,000 11,055,000,000 10,846,000,000 9,824,000,000 10,401,000,000 10,241,000,000 10,728,000,000 8,203,000,000 8,308,000,000 7,568,000,000 9,201,000,000 9,591,000,000 8,612,000,000 8,549,000,000 
        long-term debt
      30,706,000,000 30,505,000,000 31,232,000,000 26,835,000,000 26,845,000,000 24,432,000,000 24,053,000,000 24,034,000,000 24,832,000,000 25,329,000,000 26,463,000,000 27,211,000,000 27,205,000,000 25,634,000,000 25,638,000,000 25,687,000,000 25,634,000,000 24,968,000,000 27,270,000,000 28,250,000,000 30,694,000,000 28,730,000,000 29,377,000,000 30,451,000,000 29,899,000,000 28,127,000,000 28,282,000,000 27,853,000,000 27,565,000,000 26,980,000,000 18,423,000,000 17,241,000,000 17,232,000,000 12,322,000,000 12,753,000,000 12,577,000,000 12,570,000,000 10,544,000,000 10,538,000,000 11,032,000,000 11,351,000,000 11,896,000,000 5,912,000,000 5,918,000,000 5,967,000,000 6,610,000,000 6,238,000,000 3,612,000,000 3,635,000,000 3,373,000,000 3,380,000,000 3,387,000,000 3,394,000,000 3,342,000,000 3,329,000,000 3,316,000,000 3,304,000,000 3,292,000,000 3,285,000,000 3,262,000,000 
        deferred income taxes
      5,995,000,000 5,984,000,000 5,964,000,000 5,718,000,000 5,759,000,000 5,771,000,000 5,766,000,000 5,810,000,000 5,831,000,000 5,834,000,000 5,813,000,000 5,913,000,000 5,893,000,000 5,904,000,000 5,610,000,000 5,542,000,000 5,571,000,000 5,638,000,000 5,545,000,000 5,704,000,000 6,215,000,000 6,203,000,000 5,703,000,000 5,914,000,000 5,772,000,000 6,392,000,000 6,180,000,000 5,235,000,000 5,011,000,000 4,864,000,000 3,206,000,000 3,144,000,000 3,120,000,000 2,654,000,000 3,935,000,000 3,923,000,000 3,888,000,000 3,861,000,000 3,682,000,000 3,520,000,000 3,356,000,000 3,285,000,000 1,942,000,000 2,011,000,000 2,019,000,000 2,014,000,000 2,165,000,000 2,170,000,000 2,290,000,000 2,304,000,000 2,228,000,000 2,187,000,000 2,094,000,000 2,050,000,000 1,954,000,000 1,823,000,000 1,509,000,000 1,310,000,000 1,473,000,000 436,000,000 
        defined benefit postretirement plan obligations
      1,231,000,000 1,173,000,000 1,132,000,000 1,231,000,000 1,176,000,000 1,157,000,000 1,191,000,000 1,228,000,000 1,182,000,000 1,102,000,000 971,000,000 1,181,000,000 1,147,000,000 1,114,000,000 1,305,000,000 1,133,000,000 1,063,000,000 1,015,000,000 1,354,000,000 1,850,000,000 1,958,000,000 2,121,000,000 1,816,000,000 1,772,000,000 1,703,000,000 1,643,000,000 1,487,000,000 1,610,000,000 1,567,000,000 1,509,000,000 1,045,000,000 1,156,000,000 1,126,000,000 1,099,000,000 1,029,000,000 998,000,000 1,085,000,000 1,055,000,000 1,174,000,000 1,242,000,000 1,216,000,000 1,179,000,000 1,139,000,000 1,143,000,000 1,123,000,000 1,099,000,000 937,000,000 906,000,000 855,000,000 771,000,000 895,000,000 929,000,000 1,214,000,000 1,266,000,000 1,270,000,000 1,348,000,000 1,809,000,000 1,783,000,000 1,522,000,000 1,489,000,000 
        long-term operating lease liabilities
      1,000,000,000 993,000,000 918,000,000 935,000,000 817,000,000 860,000,000 691,000,000 711,000,000 770,000,000 764,000,000 848,000,000 859,000,000 858,000,000 841,000,000 839,000,000 879,000,000 905,000,000 927,000,000 975,000,000 1,020,000,000 1,007,000,000 1,014,000,000 1,116,000,000 1,850,000,000 1,949,000,000 1,875,000,000 1,962,000,000 2,068,000,000 2,153,000,000                                
        deferred credits and other liabilities
      1,417,000,000 1,536,000,000 1,377,000,000 1,246,000,000 1,246,000,000 1,305,000,000 1,352,000,000 1,358,000,000 1,355,000,000 1,409,000,000 1,341,000,000 1,244,000,000 1,214,000,000 1,304,000,000 1,213,000,000 1,390,000,000 1,360,000,000 1,346,000,000 1,294,000,000 1,271,000,000 1,213,000,000 1,207,000,000 1,248,000,000 1,285,000,000 1,229,000,000 1,265,000,000 1,265,000,000 1,174,000,000 1,131,000,000 1,318,000,000 689,000,000 659,000,000 651,000,000 666,000,000 640,000,000 627,000,000 615,000,000 604,000,000 602,000,000 629,000,000 746,000,000 735,000,000 557,000,000 566,000,000 747,000,000 768,000,000 727,000,000 596,000,000 775,000,000 781,000,000 835,000,000 754,000,000 931,000,000 257,000,000 255,000,000 300,000,000 267,000,000 264,000,000 284,000,000 304,000,000 
        total liabilities
      64,760,000,000 59,869,000,000 59,351,000,000 55,220,000,000 58,568,000,000 54,352,000,000 54,121,000,000 57,141,000,000 55,757,000,000 54,588,000,000 57,171,000,000 53,874,000,000 53,374,000,000 54,817,000,000 55,919,000,000 63,068,000,000 59,653,000,000 51,792,000,000 53,336,000,000 57,607,000,000 57,172,000,000 54,938,000,000 53,506,000,000 52,776,000,000 54,121,000,000 55,449,000,000 54,515,000,000 52,830,000,000 52,574,000,000 47,887,000,000 32,997,000,000 31,915,000,000 30,501,000,000 27,219,000,000 26,004,000,000 24,883,000,000 25,024,000,000 23,210,000,000 22,336,000,000 23,205,000,000 22,264,000,000 23,440,000,000 17,236,000,000 18,363,000,000 18,202,000,000 19,070,000,000 20,439,000,000 18,339,000,000 18,401,000,000 17,053,000,000 17,739,000,000 17,498,000,000 18,361,000,000 15,118,000,000 15,116,000,000 14,355,000,000 16,090,000,000 16,240,000,000 15,176,000,000 14,987,000,000 
        commitments and contingencies
                                                                  
        equity
                                                                  
        preferred stock, no shares issued and outstanding
                                                                  
        common stock:
                                                                  
        issued – 995 million and 994 million shares
      10,000,000                                                            
        held in treasury, at cost – 702 million and 699 million shares
      -56,783,000,000                                                            
        additional paid-in capital
      33,668,000,000 33,685,000,000 33,695,000,000 33,658,000,000 33,668,000,000 33,624,000,000 33,630,000,000 33,635,000,000 33,530,000,000 33,465,000,000 33,426,000,000 33,411,000,000 33,408,000,000 33,402,000,000 33,363,000,000 33,378,000,000 33,327,000,000 33,262,000,000 33,256,000,000 33,238,000,000 33,222,000,000 33,208,000,000 33,183,000,000 33,208,000,000 33,169,000,000 33,157,000,000 33,125,000,000 33,785,000,000 33,764,000,000 33,729,000,000 13,703,000,000 13,688,000,000 13,669,000,000 11,262,000,000 11,236,000,000 11,185,000,000 11,159,000,000 11,060,000,000 11,005,000,000 10,996,000,000 10,982,000,000 11,071,000,000 9,929,000,000 9,912,000,000 9,890,000,000 9,844,000,000 9,833,000,000 9,822,000,000 9,803,000,000 9,768,000,000 9,748,000,000 9,737,000,000 9,676,000,000 9,527,000,000 9,563,000,000 9,426,000,000 9,410,000,000 9,482,000,000 9,584,000,000 9,569,000,000 
        retained earnings
      39,966,000,000 39,751,000,000 38,517,000,000 37,424,000,000 36,489,000,000 36,848,000,000 36,771,000,000 36,423,000,000 35,199,000,000 34,562,000,000 33,424,000,000 30,442,000,000 28,528,000,000 26,142,000,000 23,175,000,000 18,983,000,000 13,420,000,000 12,905,000,000 12,484,000,000 12,160,000,000 4,029,000,000 4,650,000,000 4,744,000,000 6,008,000,000 6,380,000,000 15,990,000,000 15,891,000,000 15,146,000,000 14,391,000,000 14,755,000,000 14,119,000,000 13,589,000,000 12,745,000,000 12,864,000,000 11,044,000,000 10,344,000,000 10,046,000,000 10,206,000,000 10,169,000,000 10,215,000,000 9,584,000,000 9,752,000,000 9,736,000,000 8,959,000,000 8,269,000,000 7,515,000,000 6,856,000,000 6,325,000,000 5,591,000,000 5,507,000,000 5,007,000,000 4,969,000,000 4,489,000,000 3,880,000,000 3,241,000,000 2,136,000,000 1,407,000,000 898,000,000 1,062,000,000  
        accumulated other comprehensive loss
      -108,000,000 -105,000,000 -109,000,000 -108,000,000 -109,000,000 -114,000,000 -158,000,000 -152,000,000 -143,000,000      -179,000,000 -65,000,000 -74,000,000 -67,000,000 -344,000,000 -340,000,000 -511,000,000 -512,000,000 -334,000,000 -336,000,000 -326,000,000 -320,000,000 -212,000,000 -161,000,000 -151,000,000 -144,000,000 -168,000,000 -233,000,000 -233,000,000 -231,000,000 -239,000,000 -236,000,000 -237,000,000 -234,000,000 -327,000,000 -321,000,000 -318,000,000 -318,000,000 -312,000,000 -309,000,000 -313,000,000 -313,000,000 -228,000,000 -218,000,000 -205,000,000 -204,000,000 -205,000,000 -254,000,000 -382,000,000 -464,000,000 -489,000,000 -497,000,000 -862,000,000 -879,000,000 -601,000,000 -596,000,000 
        total mpc stockholders’ equity
      16,753,000,000 17,314,000,000 17,097,000,000 16,624,000,000 16,396,000,000 17,745,000,000 18,933,000,000 21,324,000,000 22,922,000,000 24,404,000,000 25,862,000,000 25,714,000,000 26,858,000,000 27,715,000,000 26,304,000,000 26,306,000,000 23,972,000,000 26,206,000,000 28,280,000,000 28,921,000,000 21,592,000,000 22,199,000,000 22,453,000,000 23,741,000,000 24,088,000,000 33,694,000,000 33,738,000,000 34,207,000,000 33,951,000,000 35,175,000,000 15,166,000,000 14,958,000,000 14,988,000,000 14,033,000,000 12,930,000,000 12,636,000,000 13,070,000,000 13,557,000,000 13,395,000,000 13,490,000,000 12,902,000,000 13,237,000,000 12,277,000,000 11,643,000,000 11,338,000,000 10,751,000,000 10,849,000,000 10,620,000,000 10,344,000,000 10,920,000,000 10,851,000,000 11,784,000,000 12,000,000,000 11,694,000,000       
        noncontrolling interests
      6,674,000,000 6,772,000,000 6,792,000,000 6,640,000,000 6,669,000,000 6,558,000,000 6,576,000,000 6,562,000,000 6,288,000,000 6,100,000,000 5,966,000,000 5,886,000,000 5,837,000,000 6,404,000,000 6,504,000,000 6,398,000,000 6,362,000,000 6,410,000,000 6,698,000,000 6,804,000,000 6,919,000,000 7,053,000,000 7,093,000,000 7,108,000,000 7,140,000,000 8,445,000,000 8,918,000,000 8,854,000,000 8,907,000,000 8,874,000,000 3,865,000,000 3,860,000,000 3,875,000,000 6,795,000,000 6,872,000,000 6,928,000,000 6,727,000,000 6,646,000,000 6,562,000,000 6,445,000,000 6,592,000,000 6,438,000,000 648,000,000 647,000,000 642,000,000 639,000,000 417,000,000 417,000,000 414,000,000 412,000,000 413,000,000 413,000,000 412,000,000 411,000,000       
        total equity
      23,427,000,000 24,086,000,000 23,889,000,000 23,264,000,000 23,065,000,000 24,303,000,000 25,509,000,000 27,886,000,000 29,210,000,000 30,504,000,000 31,828,000,000 31,600,000,000 32,695,000,000 34,119,000,000 32,808,000,000 32,704,000,000 30,334,000,000 32,616,000,000 34,978,000,000 35,725,000,000 28,511,000,000 29,252,000,000 29,546,000,000 30,849,000,000 31,228,000,000 42,139,000,000 42,656,000,000 43,061,000,000 42,858,000,000 44,049,000,000 19,031,000,000 18,818,000,000 18,863,000,000 20,828,000,000 19,802,000,000 19,564,000,000 19,797,000,000 20,203,000,000 19,957,000,000 19,935,000,000 19,494,000,000 19,675,000,000 12,925,000,000 12,290,000,000 11,980,000,000 11,390,000,000 11,266,000,000 11,037,000,000 10,758,000,000 11,332,000,000 11,264,000,000 12,197,000,000 12,412,000,000 12,105,000,000       
        total liabilities and equity
      88,187,000,000                                        41,758,000,000 43,115,000,000 30,161,000,000 30,653,000,000 30,182,000,000 30,460,000,000 31,705,000,000 29,376,000,000 29,159,000,000 28,385,000,000 29,003,000,000 29,695,000,000 30,773,000,000 27,223,000,000       
        receivables, less allowance for expected credit loss of 20 and 73, respectively
       10,317,000,000 10,487,000,000                                                          
        redeemable noncontrolling interest
           203,000,000 203,000,000 202,000,000 561,000,000 895,000,000 970,000,000 968,000,000 968,000,000 968,000,000 967,000,000 965,000,000 965,000,000 965,000,000 986,000,000 968,000,000 968,000,000 968,000,000 968,000,000 968,000,000 968,000,000 968,000,000 968,000,000 1,005,000,000 1,004,000,000 1,004,000,000 1,003,000,000 1,003,000,000 1,000,000,000 1,000,000,000 1,000,000,000 1,000,000,000 1,000,000,000 1,000,000,000 1,000,000,000 993,000,000                     
        issued – 994 million and 994 million shares
       10,000,000 10,000,000 10,000,000 10,000,000                                                        
        held in treasury, at cost – 699 million and 678 million shares
       -56,027,000,000                                                           
        total liabilities, redeemable noncontrolling interest and equity
       83,955,000,000 83,240,000,000 78,484,000,000 81,633,000,000 78,858,000,000 79,833,000,000 85,229,000,000 85,528,000,000 85,987,000,000 89,969,000,000 86,442,000,000 87,037,000,000 89,904,000,000 89,694,000,000 96,737,000,000 90,952,000,000 85,373,000,000 89,300,000,000 94,300,000,000 86,651,000,000 85,158,000,000 84,020,000,000 84,593,000,000 86,317,000,000 98,556,000,000 98,139,000,000 96,896,000,000 96,436,000,000 92,940,000,000 53,031,000,000 51,736,000,000 50,364,000,000 49,047,000,000 46,806,000,000 45,447,000,000 45,821,000,000 44,413,000,000 43,293,000,000 44,133,000,000                     
        assets held for sale
        1,034,000,000                20,000,000  11,167,000,000 11,389,000,000 11,069,000,000                                      
        liabilities held for sale
        230,000,000                  1,592,000,000 1,850,000,000 1,713,000,000                                      
        held in treasury, at cost – 693 million and 678 million shares
        -55,016,000,000                                                          
        receivables, less allowance for expected credit loss of 22 and 73, respectively
         11,128,000,000                                                         
        held in treasury, at cost – 690 million and 678 million shares
         -54,360,000,000                                                         
        receivables, less allowance for doubtful accounts of 31 and 73, respectively
          12,114,000,000                                                        
        held in treasury, at cost – 685 million and 678 million shares
          -53,662,000,000                                                        
        short-term investments
            1,141,000,000 4,058,000,000 4,399,000,000 4,781,000,000 4,604,000,000 4,109,000,000 3,492,000,000 3,145,000,000 3,759,000,000 4,241,000,000 3,449,000,000 5,548,000,000 7,352,000,000 5,418,000,000                                         
        receivables, less allowance for doubtful accounts of 73 and 44, respectively
           11,145,000,000                                                       
        issued – 994 million and 993 million shares
           10,000,000 10,000,000 10,000,000                                                     
        held in treasury, at cost – 678 million and 625 million shares
           -52,623,000,000                                                       
        receivables, less allowance for doubtful accounts of 72 and 44, respectively
            10,180,000,000                                                      
        held in treasury, at cost – 669 million and 625 million shares
            -51,320,000,000                                                      
        receivables, less allowance for doubtful accounts of 50 and 44, respectively
             12,307,000,000 13,171,000,000                                                    
        held in treasury, at cost – 653 million and 625 million shares
             -48,592,000,000                                                     
        issued – 993 million and 993 million shares
              10,000,000                                                    
        held in treasury, at cost – 638 million and 625 million shares
              -45,674,000,000                                                    
        receivables, less allowance for doubtful accounts of 44 and 29, respectively
               11,619,000,000                                                   
        issued – 993 million and 990 million shares
               10,000,000 10,000,000                                                  
        held in treasury, at cost – 625 million and 536 million shares
               -43,502,000,000                                                   
        accumulated other comprehensive income
               -131,000,000 -49,000,000 -30,000,000 -9,000,000 2,000,000                                               
        receivables, less allowance for doubtful accounts of 43 and 29, respectively
                12,469,000,000                                                  
        held in treasury, at cost – 607 million and 536 million shares
                -40,949,000,000                                                  
        receivables, less allowance for doubtful accounts of 54 and 29, respectively
                 10,274,000,000                                                 
        issued – 992 million and 990 million shares
                 10,000,000                                                 
        held in treasury, at cost – 587 million and 536 million shares
                 -38,119,000,000                                                 
        receivables, less allowance for doubtful accounts of 32 and 29, respectively
                  10,143,000,000                                                
        issued – 991 million and 990 million shares
                  10,000,000                                                
        held in treasury, at cost – 561 million and 536 million shares
                  -35,079,000,000                                                
        receivables, less allowance for doubtful accounts of 29 and 40, respectively
                   13,477,000,000                                               
        issued – 990 million and 984 million shares
                   10,000,000                                               
        held in treasury, at cost – 536 million and 405 million shares
                   -31,841,000,000                                               
        receivables, less allowance for doubtful accounts of 39 and 40, respectively
                    13,458,000,000 17,305,000,000 15,661,000,000                                            
        issued – 989 million and 984 million shares
                    10,000,000 10,000,000                                             
        held in treasury, at cost – 520 million and 405 million shares
                    -30,065,000,000                                              
        held in treasury, at cost – 476 million and 405 million shares
                     -26,000,000,000                                             
        issued – 987 million and 984 million shares
                      10,000,000                                            
        held in treasury, at cost – 442 million and 405 million shares
                      -22,711,000,000                                            
        receivables, less allowance for doubtful accounts of 40 and 18, respectively
                       11,034,000,000                                           
        issued – 984 million and 980 million shares
                       10,000,000                                           
        held in treasury, at cost – 405 million and 329 million shares
                       -19,904,000,000                                           
        current assets:
                                                                  
        receivables, less allowance for doubtful accounts of 43 and 18, respectively
                        9,511,000,000                                          
        current liabilities:
                                                                  
        mpc stockholders’ equity:
                                                                  
        issued – 983 million and 980 million shares
                        10,000,000 10,000,000                                         
        held in treasury, at cost – 361 million and 329 million shares
                        -17,126,000,000                                          
        receivables, less allowance for doubtful accounts of 44 and 18, respectively
                         9,771,000,000 7,468,000,000                                        
        held in treasury, at cost – 345 million and 329 million shares
                         -16,147,000,000                                         
        issued – 981 million and 980 million shares
                          10,000,000                                        
        held in treasury, at cost – 329 million and 329 million shares
                          -15,158,000,000 -15,157,000,000 -15,150,000,000 -15,149,000,000 -15,145,000,000                                    
        receivables, less allowance for doubtful accounts of 18 and 17, respectively
                           5,760,000,000  4,361,000,000 5,583,000,000                                    
        issued – 980 million and 978 million shares
                           10,000,000 10,000,000                                      
        receivables, less allowance for doubtful accounts of 22 and 17, respectively
                            4,911,000,000                                      
        issued – 979 million and 978 million shares
                             10,000,000 10,000,000                                    
        receivables, less allowance for doubtful accounts of 17 and 9, respectively
                               7,872,000,000                                   
        issued – 978 million and 975 million shares
                               10,000,000 10,000,000 10,000,000                                 
        held in treasury, at cost – 329 million and 295 million shares
                               -15,143,000,000                                   
        receivables, less allowance for doubtful accounts of 21 and 9, respectively
                                7,461,000,000                                  
        held in treasury, at cost – 328 million and 295 million shares
                                -15,076,000,000                                  
        receivables, less allowance for doubtful accounts of 10 and 9, respectively
                                 7,603,000,000                                 
        held in treasury, at cost – 318 million and 295 million shares
                                 -14,573,000,000                                 
        receivables, less allowance for doubtful accounts of 9 and 9, respectively
                                  6,893,000,000                                
        issued – 976 million and 975 million shares
                                  10,000,000                                
        held in treasury, at cost – 309 million and 295 million shares
                                  -14,063,000,000                                
        receivables, less allowance for doubtful accounts of 9 and 11, respectively
                                   5,853,000,000                               
        issued – 975 million and 734 million shares
                                   10,000,000                               
        held in treasury, at cost – 295 million and 248 million shares
                                   -13,175,000,000                               
        receivables, less allowance for doubtful accounts of 10 and 11
                                    5,408,000,000 4,919,000,000 4,613,000,000                            
        issued – 735 million and 734 million shares
                                    7,000,000 7,000,000                             
        held in treasury, at cost – 284 million and 248 million shares
                                    -12,495,000,000                              
        held in treasury, at cost – 279 million and 248 million shares
                                     -12,093,000,000                             
        issued – 734 million and 734 million shares
                                      7,000,000                            
        held in treasury, at cost – 267 million and 248 million shares
                                      -11,200,000,000                            
        receivables, less allowance for doubtful accounts of 11 and 12
                                       4,695,000,000       2,602,000,000                    
        consumer excise taxes payable
                                       501,000,000 371,000,000 474,000,000 482,000,000 464,000,000 329,000,000 480,000,000 459,000,000 460,000,000 342,000,000 469,000,000 455,000,000 463,000,000 365,000,000 381,000,000 371,000,000 373,000,000 277,000,000 406,000,000 401,000,000 325,000,000 264,000,000 361,000,000 337,000,000 337,000,000 235,000,000 303,000,000 
        issued – 734 million and 731 million shares
                                       7,000,000                           
        held in treasury, at cost – 248 million and 203 million shares
                                       -9,869,000,000                           
        receivables, less allowance for doubtful accounts of 10 and 12
                                        3,900,000,000 3,259,000,000 3,284,000,000                        
        issued – 733 million and 731 million shares
                                        7,000,000                          
        held in treasury, at cost – 235 million and 203 million shares
                                        -9,118,000,000                          
        issued – 732 million and 731 million shares
                                         7,000,000                         
        held in treasury, at cost – 226 million and 203 million shares
                                         -8,664,000,000                         
        issued – 731 million and 731 million shares
                                          7,000,000                        
        held in treasury, at cost – 212 million and 203 million shares
                                          -7,905,000,000                        
        receivables, less allowance for doubtful accounts of 12 and 12
                                           3,617,000,000 3,136,000,000 3,199,000,000                     
        issued – 731 million and 729 million shares
                                           7,000,000 7,000,000                      
        held in treasury, at cost – 203 million and 198 million shares
                                           -7,482,000,000 -7,459,000,000                      
        issued – 730 million and 729 million shares
                                             7,000,000 7,000,000                    
        held in treasury, at cost – 202 million and 198 million shares
                                             -7,407,000,000                     
        held in treasury, at cost – 200 million and 198 million shares
                                              -7,353,000,000                    
        receivables, less allowance for doubtful accounts of 12 and 13
                                               2,927,000,000   3,364,000,000                
        long-term debt due within one year
                                               29,000,000 780,000,000 780,000,000 776,000,000 27,000,000 26,000,000 26,000,000 24,000,000 23,000,000 23,000,000 23,000,000 22,000,000 19,000,000 20,000,000 19,000,000 17,000,000 15,000,000 14,000,000 12,000,000 
        issued – 729 million and 726 million shares
                                               7,000,000 7,000,000                  
        held in treasury, at cost – 198 million and 179 million shares
                                               -7,275,000,000                   
        receivables, less allowance for doubtful accounts of 35 and 13
                                                3,124,000,000                  
        held in treasury, at cost – 195 million and 179 million shares
                                                -7,083,000,000                  
        receivables, less allowance for doubtful accounts of 30 and 13
                                                 3,876,000,000                 
        issued – 728 million and 726 million shares
                                                 7,000,000                 
        held in treasury, at cost – 191 million and 179 million shares
                                                 -6,926,000,000                 
        issued – 364 million and 363 million shares
                                                  4,000,000                
        held in treasury, at cost – 92 million and 89 million shares
                                                  -6,512,000,000                
        receivables, less allowance for doubtful accounts of 13 and 9
                                                   4,058,000,000               
        issued – 363 million and 362 million shares
                                                   4,000,000               
        held in treasury, at cost – 89 million and 65 million shares
                                                   -6,299,000,000               
        receivables, less allowance for doubtful accounts of 10 and 9
                                                    5,271,000,000              
        issued - 363 million and 362 million shares
                                                    4,000,000 4,000,000 4,000,000            
        held in treasury, at cost - 82 million and 65 million shares
                                                    -5,616,000,000              
        receivables, less allowance for doubtful accounts of 9 and 9
                                                     5,725,000,000 5,420,000,000            
        held in treasury, at cost - 78 million and 65 million shares
                                                     -5,313,000,000             
        held in treasury, at cost - 73 million and 65 million shares
                                                      -4,849,000,000            
        receivables, less allowance for doubtful accounts of 9 and 10
                                                       5,559,000,000 5,593,000,000 6,163,000,000 5,509,000,000        
        issued - 362 million and 361 million shares
                                                       4,000,000           
        held in treasury, at cost - 65 million and 28 million shares
                                                       -4,155,000,000           
        issued—362 million and 361 million shares
                                                        4,000,000 4,000,000         
        held in treasury, at cost—59 million and 28 million shares
                                                        -3,703,000,000          
        held in treasury, at cost—45 million and 28 million shares
                                                         -2,672,000,000         
        issued—361 million and 361 million shares
                                                          4,000,000        
        held in treasury, at cost—34 million and 28 million shares
                                                          -1,787,000,000        
        receivables, less allowance for doubtful accounts of 10 and 3
                                                           4,610,000,000       
        issued - 361 million and 357 million shares
                                                           4,000,000       
        held in treasury, at cost - 28 million shares at december 31, 2012
                                                           -1,253,000,000       
        receivables, less allowance for doubtful accounts of 2 and 3
                                                            5,101,000,000 4,708,000,000 5,867,000,000    
        stockholders' equity
                                                                  
        issued—359 million and 357 million shares
                                                            4,000,000      
        held in treasury, at cost—20 million shares at september 30, 2012
                                                            -852,000,000      
        total stockholders’ equity
                                                            11,467,000,000 10,326,000,000 9,216,000,000    
        total liabilities and stockholders’ equity
                                                            26,583,000,000 24,681,000,000 25,306,000,000    
        stockholders’ equity
                                                                  
        issued—358 million and 357 million shares
                                                             4,000,000 4,000,000    
        held in treasury, at cost—18 million shares at june 30, 2012
                                                             -743,000,000     
        held in treasury, at cost—18 million shares at march 31, 2012
                                                              -743,000,000    
        related party debt securities
                                                                  
        receivables, less allowance for doubtful accounts of 3 and 4
                                                               5,459,000,000   
        receivables from related parties
                                                               2,000,000 1,000,000 1,000,000 
        payables to related parties
                                                               20,000,000 14,000,000 16,000,000 
        long-term debt payable within one year to marathon oil and subsidiaries
                                                                  
        long-term debt payable to marathon oil and subsidiaries
                                                                  
        stockholders’ equity / net investment
                                                                  
        preferred stock - no shares issued and outstanding at december 31, 2011
                                                                  
        common stock - 357 million shares issued and outstanding at december 31, 2011
                                                               4,000,000   
        net investment
                                                                  
        total stockholders’ equity / net investment
                                                               9,505,000,000 10,049,000,000 8,977,000,000 
        total liabilities and stockholders’ equity / net investment
                                                               25,745,000,000 25,225,000,000 23,964,000,000 
        receivables, less allowance for doubtful accounts of 4 and 4
                                                                4,913,000,000 5,041,000,000 
        preferred stock - no shares issued and outstanding at september 30, 2011
                                                                  
        common stock - 357 million shares issued and outstanding at september 30, 2011
                                                                4,000,000  
        preferred stock - 0 shares issued at june 30, 2011
                                                                  
        common stock - 356 million shares issued at june 30, 2011
                                                                 4,000,000 
      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 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 
                                                                   
          operating activities:
                                                                   
          net income
        851,000,000 1,979,000,000 1,943,000,000 1,610,000,000 346,000,000 785,000,000 1,015,000,000 1,955,000,000 1,312,000,000 1,877,000,000 3,631,000,000 2,580,000,000 3,084,000,000 3,641,000,000 5,020,000,000 6,217,000,000 1,172,000,000 1,105,000,000 1,030,000,000 8,802,000,000 64,000,000 574,000,000 -609,000,000 276,000,000 -10,218,000,000 262,000,000 1,367,000,000 1,367,000,000 259,000,000 1,195,000,000 941,000,000 1,235,000,000 235,000,000 2,125,000,000 1,004,000,000 574,000,000 101,000,000 289,000,000 219,000,000 783,000,000 -78,000,000 168,000,000 958,000,000 839,000,000 903,000,000 805,000,000 679,000,000 864,000,000 207,000,000 631,000,000 173,000,000 599,000,000 730,000,000 759,000,000 1,224,000,000 814,000,000 596,000,000 -75,000,000 1,133,000,000 
          adjustments to reconcile net income to net cash from operating activities
                                                                   
          amortization of deferred financing costs and debt discount
        10,000,000 9,000,000 9,000,000 9,000,000 12,000,000 13,000,000 -5,000,000 -15,000,000 -24,000,000 -27,000,000 -24,000,000 -17,000,000 -10,000,000 5,000,000 12,000,000 14,000,000 19,000,000 20,000,000 18,000,000 19,000,000 22,000,000 20,000,000 19,000,000 16,000,000 14,000,000 14,000,000 10,000,000   19,000,000 16,000,000 17,000,000 18,000,000 18,000,000 16,000,000 15,000,000 15,000,000 14,000,000 18,000,000                     
          depreciation and amortization
        809,000,000 828,000,000 841,000,000 789,000,000 793,000,000 826,000,000 846,000,000 838,000,000 827,000,000 828,000,000 845,000,000 834,000,000 800,000,000 797,000,000 794,000,000 819,000,000 805,000,000 813,000,000 836,000,000 871,000,000 844,000,000 849,000,000 629,000,000 935,000,000 962,000,000 978,000,000 855,000,000 886,000,000 919,000,000 874,000,000 555,000,000 533,000,000 528,000,000 540,000,000 517,000,000 521,000,000 536,000,000 504,000,000 507,000,000 500,000,000 490,000,000 413,000,000 508,000,000 362,000,000 363,000,000 359,000,000 322,000,000 325,000,000 320,000,000 332,000,000 299,000,000 302,000,000 287,000,000 283,000,000 246,000,000 236,000,000 230,000,000 230,000,000 227,000,000 
          pension and other postretirement benefits
        55,000,000 52,000,000 -103,000,000 52,000,000 15,000,000 41,000,000 -48,000,000 33,000,000 33,000,000 19,000,000 -235,000,000 11,000,000 14,000,000 37,000,000 18,000,000 82,000,000 35,000,000 36,000,000 -501,000,000 124,000,000 -158,000,000 48,000,000 69,000,000 48,000,000 55,000,000 46,000,000 -196,000,000 34,000,000 52,000,000 52,000,000 -27,000,000 33,000,000 32,000,000 79,000,000 27,000,000 -86,000,000 27,000,000 30,000,000 -77,000,000 26,000,000 30,000,000 29,000,000 -6,000,000 31,000,000 26,000,000 28,000,000 14,000,000 27,000,000 82,000,000 -127,000,000 45,000,000 -70,000,000 28,000,000 34,000,000 -64,000,000 131,000,000 52,000,000 -176,000,000 24,000,000 
          deferred income taxes
        19,000,000 31,000,000 309,000,000 -30,000,000 -28,000,000 8,000,000 -37,000,000 -60,000,000 -35,000,000 36,000,000 -86,000,000 27,000,000 -5,000,000 252,000,000 130,000,000 -40,000,000 -52,000,000 6,000,000 -126,000,000 -73,000,000 24,000,000 522,000,000 -298,000,000 160,000,000 -625,000,000 251,000,000 412,000,000 233,000,000 127,000,000 5,000,000 40,000,000 21,000,000 -19,000,000 -1,290,000,000 34,000,000 28,000,000 -5,000,000 59,000,000 160,000,000 177,000,000 -2,000,000 140,000,000 6,000,000 -10,000,000 -2,000,000 -116,000,000 -35,000,000 -77,000,000 -14,000,000 1,000,000 -12,000,000 28,000,000 6,000,000 67,000,000 97,000,000 136,000,000 192,000,000 -6,000,000 95,000,000 
          income from equity method investments
        -176,000,000 -204,000,000 -976,000,000 -212,000,000 -230,000,000 -252,000,000 -219,000,000 -373,000,000 -204,000,000 -195,000,000 -215,000,000 -199,000,000 -133,000,000  -180,000,000 -147,000,000 -142,000,000         -64,000,000 -124,000,000 -107,000,000 -99,000,000  -96,000,000 -80,000,000 -86,000,000   -83,000,000 -57,000,000                       
          distributions from equity method investments
        273,000,000 398,000,000 302,000,000 328,000,000 227,000,000 333,000,000 328,000,000 292,000,000 262,000,000 255,000,000 257,000,000 246,000,000 183,000,000 228,000,000 208,000,000 176,000,000 160,000,000 186,000,000 163,000,000 161,000,000 142,000,000 149,000,000 98,000,000 155,000,000 175,000,000 189,000,000 163,000,000 162,000,000 148,000,000 174,000,000 128,000,000 128,000,000 89,000,000 136,000,000 115,000,000 76,000,000 61,000,000                       
          changes in the fair value of derivative instruments
        -318,000,000 29,000,000 9,000,000 -38,000,000 -16,000,000 24,000,000 37,000,000 -27,000,000 37,000,000 30,000,000 -48,000,000 -7,000,000 95,000,000 1,000,000 21,000,000 -98,000,000 -71,000,000    -43,000,000 8,000,000 14,000,000 70,000,000 -47,000,000 26,000,000 -7,000,000 -56,000,000 29,000,000 -75,000,000 12,000,000 15,000,000 -14,000,000 15,000,000 42,000,000 31,000,000 28,000,000 -47,000,000 -23,000,000 47,000,000 -18,000,000 -5,000,000 -9,000,000 30,000,000 -12,000,000 32,000,000 -33,000,000 23,000,000 -25,000,000 33,000,000 3,000,000 -57,000,000 51,000,000 -98,000,000 97,000,000 9,000,000 52,000,000 -17,000,000 
          changes in:
                                                                   
          current receivables
        -4,302,000,000 184,000,000 645,000,000 989,000,000 -928,000,000 -944,000,000 2,143,000,000 882,000,000 -964,000,000 896,000,000 -2,162,000,000 -112,000,000 3,350,000,000 56,000,000 3,911,000,000 -1,655,000,000 -4,627,000,000 -1,534,000,000 182,000,000 -2,224,000,000 -1,723,000,000 -863,000,000 -789,000,000 1,218,000,000 1,899,000,000 -409,000,000 135,000,000 -713,000,000 -1,037,000,000 2,298,000,000 -484,000,000 -321,000,000 96,000,000 -797,000,000 -640,000,000 11,000,000 333,000,000 -465,000,000 67,000,000 -601,000,000 325,000,000 361,000,000 752,000,000 -512,000,000 691,000,000 1,218,000,000 585,000,000 -300,000,000 139,000,000 34,000,000 565,000,000 -655,000,000 -884,000,000 491,000,000 -393,000,000 1,159,000,000 -406,000,000 -545,000,000 127,000,000 
          inventories
        -635,000,000 -311,000,000 253,000,000 382,000,000 -920,000,000 318,000,000 -107,000,000 -19,000,000 -462,000,000 824,000,000 -605,000,000 733,000,000 -1,441,000,000 1,008,000,000 1,184,000,000 -1,556,000,000 -1,423,000,000 1,173,000,000 -326,000,000 -472,000,000 -408,000,000 585,000,000 748,000,000 839,000,000 -422,000,000 -548,000,000 -558,000,000 744,000,000 -4,000,000 716,000,000 149,000,000 -374,000,000 440,000,000 -57,000,000 56,000,000 -157,000,000 264,000,000 -141,000,000 -315,000,000 160,000,000 226,000,000 -6,000,000 -16,000,000 -103,000,000 205,000,000 -55,000,000 192,000,000 77,000,000 -1,000,000,000 1,025,000,000 -875,000,000 62,000,000 -517,000,000 440,000,000 142,000,000 -665,000,000 -32,000,000 294,000,000 64,000,000 
          current liabilities and other current assets
        4,677,000,000 428,000,000 -689,000,000 -1,303,000,000 788,000,000 1,108,000,000 -2,250,000,000 -295,000,000 999,000,000                                                   
          right of use assets and operating lease liabilities
        5,000,000 3,000,000 4,000,000 4,000,000 2,000,000 -9,000,000 -2,000,000 1,000,000 -4,000,000 -2,000,000 1,000,000 -2,000,000  -1,000,000 2,000,000 -2,000,000 1,000,000 -1,000,000 5,000,000 -17,000,000 -4,000,000 6,000,000 -4,000,000 -6,000,000 11,000,000                                 
          all other
        -147,000,000   65,000,000 -125,000,000 -33,000,000 -19,000,000 30,000,000 -230,000,000 -125,000,000 -127,000,000 93,000,000 -253,000,000 68,000,000 -338,000,000 -190,000,000 -87,000,000 34,000,000 -108,000,000 -28,000,000 -51,000,000 146,000,000 103,000,000 -41,000,000 -17,000,000 -2,000,000 78,000,000 243,000,000 -39,000,000 79,000,000 34,000,000 -42,000,000 1,000,000 -103,000,000 -48,000,000 -81,000,000 30,000,000 -35,000,000 -41,000,000 -37,000,000 17,000,000 15,000,000 -4,000,000 -42,000,000 -67,000,000 27,000,000 17,000,000 41,000,000 7,000,000 -22,000,000 2,000,000 -8,000,000 -18,000,000 -13,000,000 50,000,000 34,000,000 1,000,000 12,000,000 
          net cash from operating activities
        1,121,000,000 3,069,000,000 2,609,000,000 2,639,000,000 -64,000,000 2,207,000,000 1,684,000,000 3,242,000,000 1,532,000,000 1,123,000,000 4,953,000,000 3,984,000,000 4,057,000,000 4,382,000,000 2,514,000,000 6,952,000,000 2,513,000,000 3,674,000,000 -1,148,000,000 1,380,000,000 454,000,000 1,328,000,000 1,321,000,000 538,000,000 -768,000,000 2,409,000,000 2,787,000,000 2,622,000,000 1,623,000,000 2,727,000,000 1,182,000,000 2,386,000,000 -137,000,000 2,746,000,000 1,901,000,000 849,000,000 1,113,000,000 991,000,000 405,000,000 2,263,000,000 327,000,000 808,000,000 1,069,000,000 994,000,000 1,190,000,000 388,000,000 1,078,000,000 878,000,000 766,000,000 1,355,000,000 407,000,000 -436,000,000 2,079,000,000 2,043,000,000 1,833,000,000 269,000,000 347,000,000 638,000,000 1,719,000,000 
          capital expenditures
        -913,000,000 -1,181,000,000 -947,000,000 -695,000,000 -663,000,000 -810,000,000 -651,000,000 -487,000,000 -585,000,000 -532,000,000 -420,000,000 -481,000,000 -457,000,000 -726,000,000 -701,000,000 -498,000,000 -495,000,000 -481,000,000 -377,000,000 -302,000,000 -304,000,000 -457,000,000 -420,000,000 -848,000,000 -1,062,000,000 -1,551,000,000 -1,404,000,000 -1,178,000,000 -1,241,000,000 -1,263,000,000 -849,000,000 -711,000,000 -755,000,000 -804,000,000 -663,000,000 -655,000,000 -610,000,000 -745,000,000 -716,000,000 -686,000,000 -745,000,000 -721,000,000 -513,000,000 -375,000,000 -389,000,000 -528,000,000 -383,000,000 -302,000,000 -267,000,000 -473,000,000 -309,000,000 -229,000,000 -195,000,000 -403,000,000 -331,000,000 -326,000,000 -309,000,000 -341,000,000 -327,000,000 
          free cash flows
        208,000,000 1,888,000,000 1,662,000,000 1,944,000,000 -727,000,000 1,397,000,000 1,033,000,000 2,755,000,000 947,000,000 591,000,000 4,533,000,000 3,503,000,000 3,600,000,000 3,656,000,000 1,813,000,000 6,454,000,000 2,018,000,000 3,193,000,000 -1,525,000,000 1,078,000,000 150,000,000 871,000,000 901,000,000 -310,000,000 -1,830,000,000 858,000,000 1,383,000,000 1,444,000,000 382,000,000 1,464,000,000 333,000,000 1,675,000,000 -892,000,000 1,942,000,000 1,238,000,000 194,000,000 503,000,000 246,000,000 -311,000,000 1,577,000,000 -418,000,000 87,000,000 556,000,000 619,000,000 801,000,000 -140,000,000 695,000,000 576,000,000 499,000,000 882,000,000 98,000,000 -665,000,000 1,884,000,000 1,640,000,000 1,502,000,000 -57,000,000 38,000,000 297,000,000 1,392,000,000 
          investing activities:
                                                                   
          additions to property, plant and equipment
        -913,000,000 -1,181,000,000 -947,000,000 -695,000,000 -663,000,000 -810,000,000 -651,000,000 -487,000,000 -585,000,000 -532,000,000 -420,000,000 -481,000,000 -457,000,000 -726,000,000 -701,000,000 -498,000,000 -495,000,000 -481,000,000 -377,000,000 -302,000,000 -304,000,000 -457,000,000 -420,000,000 -848,000,000 -1,062,000,000 -1,551,000,000 -1,404,000,000 -1,178,000,000 -1,241,000,000 -1,263,000,000 -849,000,000 -711,000,000 -755,000,000 -804,000,000 -663,000,000 -655,000,000 -610,000,000 -745,000,000 -716,000,000 -686,000,000 -745,000,000 -721,000,000 -513,000,000 -375,000,000 -389,000,000 -528,000,000 -383,000,000 -302,000,000 -267,000,000 -473,000,000 -309,000,000 -229,000,000 -195,000,000 -403,000,000 -331,000,000 -326,000,000 -309,000,000 -341,000,000 -327,000,000 
          acquisitions, net of cash acquired
        14,000,000 -3,079,000,000 -237,000,000 -66,000,000 -622,000,000     -339,000,000           -135,000,000 5,000,000 1,000,000 -3,369,000,000               10,000,000              
          disposal of assets
        5,000,000 985,000,000 2,000,000 17,000,000 1,000,000 31,000,000 2,000,000 1,000,000 1,000,000 3,000,000 9,000,000 21,000,000 3,000,000 11,000,000 7,000,000 65,000,000 7,000,000 55,000,000 17,000,000 5,000,000 76,000,000 77,000,000 -6,000,000 23,000,000 56,000,000 83,000,000 11,000,000 9,000,000 24,000,000 35,000,000 5,000,000 7,000,000 7,000,000 15,000,000 27,000,000 35,000,000 2,000,000 13,000,000 9,000,000 2,000,000 77,000,000 7,000,000 2,000,000 1,000,000 11,000,000 8,000,000 2,000,000 15,000,000 2,000,000 4,000,000 3,000,000 6,000,000 3,000,000 1,000,000 46,000,000 4,000,000 2,000,000 3,000,000 8,000,000 
          investments – acquisitions and contributions
        -302,000,000 -243,000,000 -333,000,000 -356,000,000 -132,000,000 -59,000,000 -271,000,000 -54,000,000 -125,000,000 -118,000,000 -66,000,000 -89,000,000 -207,000,000 -190,000,000 -55,000,000 -48,000,000 -112,000,000 -60,000,000 -37,000,000 -62,000,000 -51,000,000                                       
          investments – redemptions, repayments, return of capital and sales proceeds
         150,000,000 511,000,000                                                         
          net cash from investing activities
        -1,047,000,000 -214,000,000 -3,756,000,000 -974,000,000 -923,000,000 307,000,000 2,034,000,000 17,000,000 -824,000,000 -964,000,000 -435,000,000 -880,000,000 -816,000,000 -498,000,000 501,000,000 -1,088,000,000 1,708,000,000 1,448,000,000 -2,054,000,000 15,670,000,000 -267,000,000 -433,000,000 -747,000,000 -989,000,000 -1,088,000,000 -1,686,000,000 -1,695,000,000 -1,360,000,000 -1,520,000,000 -4,775,000,000 -1,377,000,000 -740,000,000 -778,000,000 -779,000,000 -603,000,000 -656,000,000 -1,356,000,000 -724,000,000 -721,000,000 -769,000,000 -727,000,000 -2,013,000,000 -572,000,000 -468,000,000 -388,000,000 -519,000,000 -3,343,000,000 -321,000,000 -360,000,000 -505,000,000 -333,000,000 -236,000,000 -1,682,000,000 -419,000,000 -235,000,000 -487,000,000 -311,000,000 -340,000,000 -309,000,000 
          financing activities:
                                                                   
          commercial paper – issued
        3,864,000,000               1,365,000,000 6,049,000,000             300,000,000 200,000,000 300,000,000 499,000,000 264,000,000                   
          commercial paper – repayments
        -3,864,000,000  -210,000,000                                                         
          long-term debt – borrowings
        1,489,000,000 5,234,000,000 1,560,000,000 4,372,000,000 1,000,000   1,589,000,000 994,000,000 2,385,000,000 1,175,000,000 200,000,000 3,990,000,000 6,785,000,000 3,870,000,000 3,540,000,000 5,422,000,000 4,250,000,000 500,000,000 5,810,000,000 5,360,000,000 2,604,000,000 2,741,000,000 1,125,000,000 9,610,000,000 250,000,000 420,000,000 2,241,000,000 150,000,000 128,000,000 586,000,000 2,465,000,000 528,000,000 890,000,000 2,633,000,000 270,000,000         
          long-term debt – repayments
        -1,538,000,000 -25,000,000 -1,463,000,000                                                         
          debt issuance costs
        -15,000,000 -42,000,000 -2,000,000 -36,000,000 -1,000,000   -15,000,000 -23,000,000 -16,000,000     -2,000,000 -24,000,000      -33,000,000 -53,000,000 -5,000,000 -7,000,000 -21,000,000 -10,000,000 -1,000,000 -17,000,000 -4,000,000 -3,000,000    -2,000,000 -2,000,000    -2,000,000 
          issuance of common stock
        1,000,000 1,000,000 23,000,000 6,000,000 8,000,000 11,000,000 2,000,000 33,000,000 10,000,000 17,000,000 59,000,000 17,000,000 71,000,000 96,000,000 35,000,000 18,000,000 30,000,000 23,000,000 5,000,000 2,000,000 4,000,000 4,000,000 3,000,000 1,000,000 2,000,000 3,000,000 9,000,000 12,000,000 19,000,000 7,000,000 10,000,000 10,000,000 3,000,000 6,000,000 1,000,000 1,000,000 4,000,000 3,000,000 5,000,000 21,000,000 5,000,000 4,000,000 4,000,000 13,000,000 11,000,000 3,000,000 6,000,000 28,000,000 54,000,000 22,000,000 5,000,000 27,000,000  
          common stock repurchased
        -750,000,000 -1,001,000,000 -650,000,000 -780,000,000 -1,057,000,000 -1,374,000,000 -2,701,000,000 -2,896,000,000 -2,218,000,000 -2,505,000,000 -2,819,000,000 -3,068,000,000 -3,180,000,000 -1,837,000,000 -3,908,000,000 -3,331,000,000 -2,846,000,000 -2,742,000,000 -928,000,000       -65,000,000 -500,000,000 -500,000,000 -885,000,000 -675,000,000 -400,000,000 -885,000,000 -1,327,000,000 -750,000,000 -452,000,000 -750,000,000 -420,000,000 -20,000,000 -51,000,000 -51,000,000 -75,000,000 -192,000,000 -156,000,000 -408,000,000 -209,000,000 -682,000,000 -301,000,000 -459,000,000 -689,000,000 -452,000,000 -1,028,000,000 -882,000,000 -431,000,000 -500,000,000 -850,000,000   
          dividends paid
        -295,000,000 -300,000,000 -276,000,000 -279,000,000 -285,000,000 -292,000,000 -273,000,000 -290,000,000 -299,000,000 -311,000,000 -297,000,000 -316,000,000 -337,000,000 -351,000,000 -285,000,000 -313,000,000 -330,000,000 -354,000,000 -370,000,000 -381,000,000 -379,000,000 -377,000,000 -378,000,000 -378,000,000 -377,000,000 -344,000,000 -348,000,000 -352,000,000 -354,000,000 -317,000,000 -207,000,000 -211,000,000 -219,000,000 -195,000,000 -202,000,000 -186,000,000 -190,000,000 -190,000,000 -190,000,000 -170,000,000 -169,000,000 -170,000,000 -171,000,000 -136,000,000 -136,000,000 -138,000,000 -141,000,000 -122,000,000 -123,000,000 -126,000,000 -129,000,000 -113,000,000 -116,000,000 -116,000,000 -119,000,000 -85,000,000 -87,000,000 -89,000,000  
          distributions to noncontrolling interests
        -407,000,000 -409,000,000 -366,000,000 -368,000,000 -370,000,000 -372,000,000 -333,000,000 -335,000,000 -337,000,000 -338,000,000 -308,000,000 -306,000,000 -329,000,000 -306,000,000 -309,000,000 -288,000,000 -311,000,000 -526,000,000 -310,000,000 -293,000,000 -320,000,000 -303,000,000 -321,000,000 -300,000,000 -320,000,000 -295,000,000 -310,000,000 -315,000,000 -325,000,000 -304,000,000 -205,000,000 -199,000,000 -195,000,000 -189,000,000 -181,000,000 -166,000,000 -158,000,000 -153,000,000 -140,000,000 -128,000,000 -121,000,000 -11,000,000 -11,000,000 -9,000,000 -9,000,000 -7,000,000 -8,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000         
          repurchases of noncontrolling interests
        -50,000,000 -100,000,000 -100,000,000 -100,000,000 -100,000,000 -100,000,000 -76,000,000 -75,000,000 -75,000,000     -176,000,000 -180,000,000 -35,000,000 -100,000,000 -165,000,000 -155,000,000 -155,000,000 -155,000,000                                       
          net cash from financing activities
        -1,596,000,000 -1,836,000,000 2,127,000,000 -3,804,000,000 1,589,000,000 -3,307,000,000 -4,157,000,000 -1,993,000,000 -2,977,000,000 -3,169,000,000 -3,411,000,000 -3,720,000,000 -3,907,000,000 -2,636,000,000 -4,715,000,000 -3,932,000,000 -2,364,000,000 -5,703,000,000 -2,762,000,000 -5,970,000,000 16,000,000 -1,057,000,000 -949,000,000 -150,000,000 2,021,000,000 -722,000,000 -813,000,000 -921,000,000 -920,000,000 -1,222,000,000 186,000,000 -1,299,000,000 2,557,000,000 -1,044,000,000 -660,000,000 -910,000,000 1,523,000,000 -89,000,000 -729,000,000 -48,000,000 -419,000,000 288,000,000 -334,000,000 -723,000,000 -218,000,000 -229,000,000 1,994,000,000 -598,000,000 -532,000,000 -576,000,000 -1,125,000,000 -996,000,000 -520,000,000 -151,000,000 -106,000,000 -92,000,000 -910,000,000 -176,000,000 -75,000,000 
          net change in cash, cash equivalents and restricted cash
        -1,522,000,000 1,019,000,000 980,000,000 -2,139,000,000 602,000,000 -793,000,000 -439,000,000 1,266,000,000 -2,269,000,000 -3,010,000,000 1,107,000,000 -616,000,000 -666,000,000 1,248,000,000 -1,700,000,000 1,932,000,000 1,857,000,000 -581,000,000 -5,964,000,000 11,080,000,000 203,000,000 -162,000,000 -375,000,000                                     
          cash, cash equivalents and restricted cash at beginning of period
        3,673,000,000 3,211,000,000 5,446,000,000  8,631,000,000           1,529,000,000 1,725,000,000 3,015,000,000                           
          cash, cash equivalents and restricted cash at end of period
        2,151,000,000 1,019,000,000 980,000,000 -2,139,000,000 3,813,000,000 -793,000,000 -439,000,000 1,266,000,000 3,177,000,000  1,107,000,000 -616,000,000 7,965,000,000           -601,000,000 1,694,000,000 1,000,000 279,000,000 341,000,000 908,000,000 -3,270,000,000 -9,000,000 347,000,000 4,657,000,000                           
          net gain on disposal of assets
         -169,000,000 2,000,000   -11,000,000 2,000,000 1,000,000 -20,000,000 -91,000,000 -110,000,000   11,000,000 -1,051,000,000   -18,000,000 -3,000,000 -64,000,000 -2,000,000 -4,000,000 -85,000,000 -4,000,000 -4,000,000 -214,000,000 -17,000,000 -1,000,000 -3,000,000 -2,000,000 2,000,000 -7,000,000 -5,000,000 -6,000,000 -1,000,000 -25,000,000 -1,000,000 -2,000,000 1,000,000 -5,000,000 -7,000,000 -2,000,000 -11,000,000 -1,000,000 -3,000,000 -1,000,000 -1,000,000 -1,000,000 1,000,000 -175,000,000 -1,000,000 -2,000,000 -2,000,000 -5,000,000 
          purchases of short-term investments
             -20,000,000 -1,268,000,000 -1,661,000,000 -1,485,000,000 -2,414,000,000 -2,611,000,000 -2,112,000,000 -2,288,000,000 -1,154,000,000 -2,217,000,000 -364,000,000 -3,041,000,000 -4,040,000,000                                         
          sales of short-term investments
             1,000,000,000 2,100,000,000 2,000,000 193,000,000 208,000,000 291,000,000 952,000,000 631,000,000 156,000,000 65,000,000 61,000,000 1,014,000,000 1,089,000,000                                          
          maturities of short-term investments
             142,000,000 861,000,000 1,638,000,000 1,885,000,000 1,147,000,000 1,670,000,000 1,069,000,000 1,162,000,000 2,763,000,000 1,585,000,000 1,368,000,000 1,443,000,000 3,754,000,000                                          
          commercial paper– repayments
                                                                   
          redemption of noncontrolling interests - preferred units
                 -600,000,000                                               
          adjustments to reconcile net income to net cash from operating activities:
                                                                   
          – redemptions, repayments, return of capital and sales proceeds
            21,000,000 20,000,000 7,000,000   5,000,000                                                  
          – repayments
            -930,000,000 -1,173,000,000 -773,000,000 -21,000,000 -17,000,000  -19,000,000 -22,000,000 -1,021,000,000     -3,081,000,000 -5,356,000,000 9,113,000,000 -3,756,000,000 -4,867,000,000 -1,521,000,000  -5,438,000,000 -5,085,000,000 -2,031,000,000     -300,000,000 -200,000,000 -300,000,000 -687,000,000 -76,000,000 -1,793,000,000 -6,000,000 -6,000,000 -421,000,000 -516,000,000 -6,000,000 -20,000,000 -6,000,000         
          income from discontinued operations
                         -8,214,000,000 -234,000,000 -324,000,000                                      
          cash from operating activities - continuing operations
                 1,123,000,000 4,953,000,000   4,296,000,000 2,514,000,000 6,996,000,000 2,513,000,000 4,838,000,000 1,745,000,000 1,536,000,000 265,000,000 948,000,000                                      
          cash from operating activities - discontinued operations
                     86,000,000   -1,164,000,000 -2,893,000,000 -156,000,000 189,000,000 380,000,000                                      
          changes in income tax receivable
                 -319,000,000 408,000,000 -432,000,000 478,000,000 -413,000,000 -153,000,000 24,000,000 -13,000,000 1,554,000,000 515,000,000 -34,000,000 54,000,000 -635,000,000 -22,000,000 185,000,000 -1,335,000,000                                   
          current accounts payable and accrued liabilities
                 -2,881,000,000 3,426,000,000 239,000,000 -2,100,000,000 -1,136,000,000 -7,061,000,000 3,389,000,000 6,717,000,000 1,590,000,000 193,000,000 2,656,000,000 1,821,000,000 1,091,000,000 1,202,000,000 -1,767,000,000 -3,453,000,000 560,000,000 645,000,000 -186,000,000 1,483,000,000 -2,482,000,000 -85,000,000 1,224,000,000 -1,455,000,000 2,160,000,000 862,000,000 7,000,000 -215,000,000 748,000,000 -395,000,000 1,442,000,000 -810,000,000 -693,000,000 -1,116,000,000 348,000,000 -939,000,000 -1,865,000,000 -676,000,000 -17,000,000 1,011,000,000 -564,000,000 239,000,000 -702,000,000 2,491,000,000 -63,000,000 862,000,000 -1,690,000,000 -332,000,000 850,000,000 66,000,000 
          cash from investing activities - continuing operations
                     -498,000,000 501,000,000 -1,088,000,000 1,708,000,000 1,448,000,000 -2,133,000,000 -5,652,000,000 -180,000,000 -370,000,000                                      
          cash from investing activities - discontinued operations
                         79,000,000 21,322,000,000 -87,000,000 -63,000,000                                      
          cash, cash equivalents and restricted cash balances:
                                                                   
          continuing operations - beginning of year
                                                                   
          discontinued operations - beginning of year
                                                                   
          less: discontinued operations - end of year
                                                                   
          continuing operations - end of year
                                                                   
          – redemptions, repayments and return of capital
                     4,000,000    36,000,000 2,000,000 1,000,000 15,000,000 4,000,000 41,000,000 77,000,000 23,000,000 17,000,000 56,000,000 2,000,000 1,000,000   1,000,000 41,000,000 8,000,000 15,000,000 6,000,000 19,000,000   3,000,000 1,000,000               
          net loss on disposal of assets
                    -3,000,000    18,000,000                                           
          impairment expense
                             146,000,000 433,000,000 25,000,000 7,822,000,000             1,000,000 129,000,000                   
          loss from equity method investments
                            -91,000,000                                       
          continuing operations - beginning of period
                      5,294,000,000    416,000,000                                       
          discontinued operations - beginning of period
                            140,000,000                                       
          less: discontinued operations - end of period
                            134,000,000                                       
          continuing operations - end of period
                      -1,700,000,000 1,932,000,000 7,151,000,000    625,000,000                                       
          changes in operating assets and liabilities, net of effects of businesses acquired:
                                                                   
          (income) income from equity method investments
                         -152,000,000 -122,000,000               -82,000,000                          
          net recognized (gains) losses on investments and derivatives
                         27,000,000 -10,000,000                                         
          contributions from noncontrolling interests
                                 2,000,000 95,000,000 3,000,000 4,000,000 4,000,000 1,000,000 1,000,000 2,000,000 126,000,000                       
          lcm inventory valuation adjustment
                              -555,000,000                                     
          investments – acquisitions, loans and contributions
                             -49,000,000 -53,000,000 -214,000,000 -169,000,000 -272,000,000 -197,000,000 -270,000,000 -325,000,000 -187,000,000 -104,000,000 -77,000,000 -41,000,000 -75,000,000 -53,000,000 -111,000,000 -566,000,000 -48,000,000 -69,000,000 -105,000,000 -66,000,000 -110,000,000 -72,000,000 -107,000,000 -42,000,000               
          cash, cash equivalents and restricted cash continuing operations - beginning of period
                                                                   
          cash, cash equivalents and restricted cash discontinued operations - beginning of period
                                                                   
          less: cash, cash equivalents and restricted cash discontinued operations - end of period
                                                                   
          cash, cash equivalents and restricted cash continuing operations - end of period
                                                                   
          inventory market valuation adjustment
                                3,220,000,000                                 
          net increase in cash, cash equivalents and restricted cash
                                165,000,000 1,000,000 279,000,000 341,000,000 -817,000,000 -3,270,000,000 -9,000,000 347,000,000 1,642,000,000                           
          issuance of mplx lp common units
                                         39,000,000 286,000,000 148,000,000 277,000,000 184,000,000 315,000,000                   
          contingent consideration payment
                                                            
          right of use assets/operating leases
                                    -1,000,000                               
          issuance of mplx lp redeemable preferred units
                                                                 
          increase in cash and cash equivalents
                                                                   
          net increase in cash and cash equivalents
                                         923,000,000 638,000,000 -717,000,000 1,280,000,000  -1,045,000,000 1,446,000,000 -819,000,000  163,000,000 -197,000,000 584,000,000     274,000,000    1,473,000,000 1,492,000,000 -310,000,000 -874,000,000 122,000,000 1,335,000,000 
          cash and cash equivalents at beginning of period
                                         887,000,000 1,127,000,000 1,494,000,000 2,292,000,000 4,860,000,000 3,079,000,000 
          cash and cash equivalents at end of period
                                         923,000,000 638,000,000 -717,000,000 2,167,000,000 178,000,000 -1,045,000,000 1,446,000,000 308,000,000 -917,000,000 163,000,000 -197,000,000 2,078,000,000 -360,000,000 -271,000,000 -41,000,000 2,166,000,000 274,000,000 -1,051,000,000 -1,668,000,000 4,737,000,000 1,473,000,000 1,492,000,000 -310,000,000 2,205,000,000 122,000,000 1,335,000,000 
          acquisitions
                                           -220,000,000             -22,000,000 -1,493,000,000 -27,000,000   
          net decrease in cash and cash equivalents
                                                      -271,000,000 -41,000,000 -126,000,000   -1,668,000,000 -123,000,000       
          equity method investments
                                              286,000,000 121,000,000 28,000,000 17,000,000 -6,000,000 12,000,000 2,000,000 56,000,000 5,000,000 -50,000,000 6,000,000 -14,000,000 -7,000,000 -1,000,000 4,000,000 -2,000,000 5,000,000 2,000,000 6,000,000 9,000,000 -5,000,000 
          inventory market valuation charge
                                                15,000,000                   
          net proceeds from issuance of mplx lp common units
                                                                   
          tax settlement with marathon oil corporation
                                                                  
          investments—acquisitions, loans and contributions
                                                      -177,000,000 -41,000,000 -123,000,000           
          —redemptions, repayments and return of capital
                                                                  
          —redemptions and repayments
                                                         1,000,000 48,000,000 17,000,000 11,000,000       
          investments in related party debt securities – purchases
                                                                 
          – redemptions
                                                                 
          investments—acquisition, loans and contributions
                                                         -38,000,000          
          long-term debt payable to marathon oil and subsidiaries – borrowings
                                                                 
          distributions to marathon oil corporation
                                                                   
          long-term debt—repayments
                                                          -6,000,000 -5,000,000 -5,000,000       
          investments—loans and advances
                                                           -17,000,000 -21,000,000  -15,000,000 -4,000,000 -7,000,000   
          distribution to noncontrolling interests
                                                            -4,000,000       
          investments – loans and advances
                                                                 -3,000,000 -11,000,000 
          – redemptions and repayments
                                                                   
          distributions to marathon oil
                                                                  
          investments in related party debt securities—purchases
                                                                   
          —redemptions
                                                                   
          long-term debt payable to marathon oil and subsidiaries—borrowings
                                                                   
          —repayments
                                                                   
          long-term debt—borrowings
                                                                   
          —repayments of loans
                                                                   
          contributions from marathon oil
                                                                   
          receivables from / payables to related parties
                                                                 6,000,000 -2,000,000 
          – repayments of loans
                                                                 18,000,000 
          contributions from (distributions to) marathon oil