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CRITICAL JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS (Details)
 12 Months Ended
Dec. 31, 2018
USD ($)
$ / ounce
Dec. 31, 2017
USD ($)
Pascua-Lama | Chile    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Amounts received from VAT refunds $ 443,000,000 $ 484,000,000
Interest payable 340,000,000 313,000,000
Revenue, performance obligation 3,538,000,000  
Pascua-Lama | Argentina    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Value added tax receivables $ 112,000,000 $ 221,000,000
Measured, Indicated and Inferred Gold Resources    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Gold price (in dollars per ounce) | $ / ounce 1,500  
Silver | Silver Wheaton Corp.    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Contract liabilities $ 253,000,000  
Silver | Lagunas Norte, Pierina and Veladero | Silver Wheaton Corp.    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Goods deliverable under contract (as percent) 100.00%  
Silver | Pascua-Lama | Silver Wheaton Corp.    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Goods deliverable under contract (as percent) 25.00%  
Long-term    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Gold price (in dollars per ounce) | $ / ounce 1,200  
Pueblo Viejo    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Proportion of ownership interest in subsidiary 60.00%  
Change in Timing or Quantity of Ounces to be Delivered Under Streaming Agreement [Member]    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Contract liabilities $ 12