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EXPLORATION, EVALUATION AND PROJECT EXPENSES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]    
Global exploration and evaluation $ 143 $ 143
Corporate development2 9 51
Business improvement and innovation 0 10
Minesite exploration and evaluation 79 69
Exploration, evaluation and project expenses (notes 5 and 8) 295 342
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination 0 18
Pascua-Lama    
Disclosure of detailed information about property, plant and equipment [line items]    
Advanced project costs 37 49
Other [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Advanced project costs $ 27 20
Nevada Gold Mines, KCGM and Acacia [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination   $ 44