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SEGMENT REPORTING - Reconciliation of Net Income (Loss) to Adjusted EBITDA (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting [Abstract] |  |  |
Net income (loss) | $ (81) | $ 293 | $ 1,128
Interest expense, net | (238) | (101) | (121)
Income tax benefit (expense) | 111 | (18) | 460
Depreciation, depletion and amortization | (308) | (85) | (89)
EBITDA | 354 | 497 | 878
EBITDA of Noncontrolling Interests | 56 | 0 | 0
Gain (loss) on extinguishment of debt | 130 | (18) | (7)
Severance Costs | (38) | (2) | 0
Acquisition-related costs excluding severance costs | (52) | (7) | 0
Amortization of Inventory Step-up | (96) | 0 | 0
EBITDA Earnings (loss) from Discontinued Operations | (1) | 1 | (121)
Foreign exchange remeasurement | 0 | 0 | (1)
Asset Impairment Charges | 0 | 0 | (1)
Adjusted EBITDA, Earnings (Loss) | 353 | 525 | 766
Net Income (Loss) Attributable to Noncontrolling Interest | (41) | $ 0 | $ 0
Depreciation, Depletion and Amortization Attributable to Noncontrolling Interests | $ 15 |  |

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