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INCOME TAXES (Provision for (benefit from) income taxes) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Current Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |
Federal | $ (53) | $ 23 | $ (46)
State | 1 | (3) | (1)
Foreign | 816 | 462 | 1,445
Total current | 764 | 482 | 1,398
Deferred income taxes: |  |  |
Federal | (3) | (48) | 106
State | (5) | (8) | 8
Foreign | 306 | 101 | 102
Total deferred | 298 | 45 | 216
Adjustments | (37) | (12) | (504)
Operating loss carryforwards | (81) | (5) | (119)
Provision for income taxes | 944 | 510 | 991
Tax Cuts and Jobs Act of 2017, change in tax rate, provisional income tax expense (benefit) |  |  | 29
Tax Cuts and Jobs Act of 2017, provisional income tax expense (benefit) | 0 | 0 | (123)
Reserve for Taxes, Other than Income Taxes [Member] |  |  |
Deferred income taxes: |  |  |
Tax Cuts and Jobs Act of 2017, provisional income tax expense (benefit) |  | 29 |
Alternative Minimum Tax Credit |  |  |
Deferred income taxes: |  |  |
Tax Cuts and Jobs Act of 2017, provisional income tax expense (benefit) |  |  | 123
Minimum Tax Credit Carryforwards [Member] |  |  |
Deferred income taxes: |  |  |
Federal Income Tax Expense (Benefit), Continuing Operations |  |  | 76
Foreign Income Tax Expense (Benefit), Continuing Operations |  |  | $ 47
Timok, Lower Zone [Member] |  |  |
Current Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |
Federal | $ (53) | $ 53 |

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