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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