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SEGMENT INFORMATION - Reconciliation of Segment Income to Loss from Continuing Operations Before Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of operating segments [line items] |  |
Revenue | $ 12,595 | $ 9,717
Other cost of sales/amortization | (7,417) | (6,911)
Exploration, evaluation and project expenses not attributable to segments | (295) | (342)
General and administrative expenses | (185) | (212)
Other income not attributable to segments | 178 | 3,100
Impairment reversals | 269 | 1,423
Loss on currency translation | (50) | (109)
Closed mine rehabilitation | (90) | (5)
Income from equity investees | 288 | 165
Finance costs, net (includes non-segment accretion) | (347) | (469)
Gain on non-hedge derivatives | 10 | 0
Income before income taxes | 4,946 | 6,357
Gain on interest rate hedges | (5) | (6)
Gain (loss) on extinguishment of borrowings | 15 | 3
Reportable segments [member] |  |
Disclosure of operating segments [line items] |  |
Revenue | 12,584 | 9,717
Exploration, evaluation and project expenses not attributable to segments | (90) | (77)
Other income not attributable to segments | (123) | (85)
Income before income taxes | 5,001 | 2,700
Reconciling items |  |
Disclosure of operating segments [line items] |  |
Revenue | 11 | 0
Other cost of sales/amortization | (47) | (56)
Exploration, evaluation and project expenses not attributable to segments | (205) | (265)
General and administrative expenses | (185) | (212)
Other income not attributable to segments | 261 | 3,132
Impairment reversals | 269 | 1,423
Loss on currency translation | (50) | (109)
Closed mine rehabilitation | (90) | (5)
Income from equity investees | 288 | 165
Finance costs, net (includes non-segment accretion) | (317) | (416)
Gain on non-hedge derivatives | 10 | 0
Gain on interest rate hedges | 0 | 0
Gain (loss) on extinguishment of borrowings | $ 15 | $ 3

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