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SIGNIFICANT JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]                
Cash and cash equivalents $ 3,743 $ 2,153 $ 3,743 $ 2,153 $ 3,327 $ 3,314 $ 2,153 $ 1,571
Line of Credit Facility, Maximum Borrowing Capacity1 3,000   3,000          
Pascua-Lama | Argentina                
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]                
Value added tax receivables 63   63     72    
Pascua-Lama | Chile                
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]                
Amounts received from VAT refunds 394   394     $ 424    
Revenue, performance obligation 3,538   3,538          
Provision for decommissioning, restoration and rehabilitation costs [member]                
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]                
Increase (decrease) in other provisions $ 0 $ 69 $ 136 $ 271