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CRITICAL JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
$ / ounce
Dec. 31, 2016
USD ($)
$ / ounce
Pascua-Lama | Chile    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Amounts received from VAT refunds $ 484 $ 429
Interest payable 313 236
Revenue, performance obligation 3,538  
Pascua-Lama | Argentina    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Value added tax receivables $ 221 $ 255
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 $ 262  
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%  
Short-term contracts    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Gold price (in dollars per ounce) | $ / ounce   1,000
Long-term    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Gold price (in dollars per ounce) | $ / ounce 1,200 1,200
Pueblo Viejo    
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items]    
Economic interest in subsidiary 60.00%