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SEGMENT REPORTING - Reconciliation of Net Income (Loss) to Adjusted EBITDA (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 19,185 | $ 21,996 | $ 22,989
Cost of goods sold | 19,115 | 20,605 | 20,471
Selling, general and administrative expenses | 486 | 577 | 465
Net periodic benefit credits other than service cost component | (247) | (204) | (212)
Segment Reporting, Other Segment Item, Amount | (2) | (80) | (130)
Adjusted EBITDA | 780 | 1,911 | 3,169
Interest expense, net | (370) | (289) | (276)
Income tax benefit (expense) | 235 | (148) | (423)
Depreciation, depletion and amortization | (951) | (973) | (1,034)
Restructuring Costs and Asset Impairment Charges | 210 |  |
Loss on extinguishment of debt | (27) | 0 | (75)
Capital additions | 817 | 785 | 1,033
Net income (loss) | (708) | 450 | 1,376
Income from continuing operations attributable to noncontrolling interest | 46 | 51 | 41
Steelmaking |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 18,620 | 21,413 | 22,462
Cost of goods sold | 18,605 | 20,055 | 20,004
Selling, general and administrative expenses | 457 | 549 | 439
Net periodic benefit credits other than service cost component | (247) | (204) | (212)
Segment Reporting, Other Segment Item, Amount | (2) | (78) | (136)
Adjusted EBITDA | 722 | 1,873 | 3,089
Depreciation, depletion and amortization | (919) | (938) | (994)
Capital additions | 812 | 782 | 1,003
Other Businesses |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 656 | 665 | 606
Cost of goods sold | 606 | 627 | 557
Selling, general and administrative expenses | 29 | 28 | 26
Net periodic benefit credits other than service cost component | 0 | 0 | 0
Segment Reporting, Other Segment Item, Amount | 0 | (2) | 6
Adjusted EBITDA | 53 | 43 | 69
Depreciation, depletion and amortization | (32) | (35) | (40)
Capital additions | 5 | 3 | 30
Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | (91) | (82) | (79)
Cost of goods sold | (96) | (77) | (90)
Selling, general and administrative expenses | 0 | 0 | 0
Net periodic benefit credits other than service cost component | 0 | 0 | 0
Segment Reporting, Other Segment Item, Amount | 0 | 0 | 0
Adjusted EBITDA | 5 | (5) | 11
Depreciation, depletion and amortization | 0 | 0 | 0
Capital additions | 0 | 0 | 0
EBITDA Calculation |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest expense, net | (370) | (289) | (276)
Income tax benefit (expense) | 235 | (148) | (423)
Depreciation, depletion and amortization | (951) | (973) | (1,034)
EBITDA of noncontrolling interests | 76 | 83 | 74
Restructuring Costs and Asset Impairment Charges | (217) |  |
Acquisition-related costs | (44) | (12) | (1)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts | (41) |  |
Amortization Of Inventory Step-Up | (26) |  |
Expenses and Losses, Reporting Currency Denominated, Value | (20) |  |
Gain (Loss) on Disposition of Other Assets | (16) | (15) | (22)
Other, net | (16) | 18 | (36)
Net income (loss) |  | 450 |
Income from continuing operations attributable to noncontrolling interest | 46 | 51 |
Depreciation, Depletion And Amortization Attributable To Noncontrolling Interests | 30 | $ 32 |
Adjusted EBITDA Calculation |  |  |
Segment Reporting Information [Line Items] |  |  |
Litigation Settlement, Amount Awarded to Other Party | (71) |  |
Loss on extinguishment of debt | $ (27) |  | (75)
Income from continuing operations attributable to noncontrolling interest |  |  | 41
Depreciation, Depletion And Amortization Attributable To Noncontrolling Interests |  |  | $ 33

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