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SIGNIFICANT JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]          
Increase (decrease) in other provisions $ 69 $ 24 $ 271 $ 82  
Pascua-Lama | Chile          
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]          
Amounts received from VAT refunds 458   458   $ 443
Interest payable 379   379   340
Revenue, performance obligation 3,538   3,538    
Pascua-Lama | Argentina          
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]          
Value added tax receivables $ 100   $ 100   $ 112