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COST OF SALES (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disclosure of Detailed Information About Cost of Sales [Line Items]        
Direct mining cost $ 1,202 $ 984 $ 2,353 $ 1,954
Depreciation expense 566 466 1,090 901
Royalty expense 127 87 222 165
Community relations 5 8 11 15
Cost of sales 1,900 1,545 3,676 3,035
Inventory reduction amount 1 12 18 16
Gold        
Disclosure of Detailed Information About Cost of Sales [Line Items]        
Direct mining cost 1,121 921 2,201 1,815
Depreciation expense 498 431 972 815
Royalty expense 116 78 200 144
Community relations 5 7 10 13
Cost of sales 1,740 1,437 3,383 2,787
Copper        
Disclosure of Detailed Information About Cost of Sales [Line Items]        
Direct mining cost 79 63 148 139
Depreciation expense 63 28 106 70
Royalty expense 11 9 22 21
Community relations 0 1 1 2
Cost of sales 153 101 277 232
Other        
Disclosure of Detailed Information About Cost of Sales [Line Items]        
Direct mining cost 2 0 4 0
Depreciation expense 5 7 12 16
Royalty expense 0 0 0 0
Community relations 0 0 0 0
Cost of sales $ 7 $ 7 $ 16 $ 16