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SEGMENT INFORMATION - Consolidated Statements of Income Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Disclosure of operating segments [line items]        
Capital expenditures $ 403 $ 341 $ 851 $ 672
Revenue 2,063 1,712 4,156 3,502
Depreciation 466 328 901 653
Exploration, evaluation and project expenses 98 97 172 170
Other expenses (income) 7 38 34 39
Net income (loss) 223 (76) 363 116
Share of income (loss) 29 18 58 52
Change in net income 0      
Cost of sales (excluding depreciation) 1,545 1,176 3,035 2,328
Adjustments for gains (losses) on change in fair value of derivatives (8) (6) 14 (29)
Pierina        
Disclosure of operating segments [line items]        
Cost of sales (excluding depreciation) 44 30 71 62
Operating segments [member]        
Disclosure of operating segments [line items]        
Capital expenditures 397 315 802 612
Revenue 2,188 1,712 4,398 3,502
Direct mining, royalties and community relations 1,130 846 2,238 1,671
Depreciation 490 320 971 637
Exploration, evaluation and project expenses 15 19 28 28
Other expenses (income) 35 38 74 37
Net income (loss) 518 489 1,087 1,129
Accretion 12 13 26 25
Material reconciling items [member]        
Disclosure of operating segments [line items]        
Exploration, evaluation and project expenses 83 78 144 142
Other expenses (income) (16) 9 (15) 28
Cost of sales (excluding depreciation) 7 10 16 20
Unrealized Gains (Losses) on Change in Fair Value of Derivatives 0 0 1 0
Hedging gains (losses) for hedge of group of items with offsetting risk positions 0 (1) 0 (2)
Consolidated total [Member]        
Disclosure of operating segments [line items]        
Revenue 2,063 1,712 4,156 3,502
Direct mining, royalties and community relations 1,079 846 2,135 1,671
Depreciation 459 320 884 637
Exploration, evaluation and project expenses 15 19 28 28
Other expenses (income) 35 38 75 37
Net income (loss) $ 475 $ 489 $ 1,034 $ 1,129