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OTHER NON-CURRENT LIABILITIES - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
$ / ounce
ozt
Dec. 31, 2018
USD ($)
Sep. 29, 2015
USD ($)
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Revenue $ 9,717 $ 7,243  
Gain (Loss) On Remeasurement Of Liability 628 0  
Pueblo Viejo      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Revenue $ 1,409 1,333  
Proportion of ownership interest in subsidiary 60.00%    
Royal Gold      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Expected initial revenue payments (as percent) 30.00%    
Expected revenue payment from contracts with customers, as percent of prevailing spot prices on volume of mineral resources in deliveries thereafter (as percent) 60.00%    
Royal Gold | Pueblo Viejo      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Revenue $ 43    
Deposits from customers     $ 610
Pascua-Lama | Pueblo Viejo      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Revenue   76  
Silver | Royal Gold      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Threshold delivery volume (in ounces) | ozt 23,100,000    
Silver | Royal Gold | Pueblo Viejo      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Percent of interest in mineral resource production sold until initial delivery maximum achieved (as percent) 75.00%    
Initial delivery maximum (in ounces) | ozt 50,000,000    
Percent of interest in mineral resource production to be delivered thereafter (as percent) 37.50%    
Fixed recovery rate (as percent) 70.00%    
Silver | Pascua-Lama | Silver Wheaton Corp.      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Goods deliverable under contract (as percent) 25.00%    
Deposits from customers $ 625    
Contract duration 3 years    
Selling price (in dollars per ounce) | $ / ounce 3.90    
Annual inflation adjustment (as percent) 1.00%    
Starting period after project period to apply annual inflation adjustment 3 years    
Gold[member]      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Revenue $ 9,186 $ 6,600  
Gold[member] | Royal Gold      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Threshold delivery volume (in ounces) | ozt 550,000    
Gold[member] | Royal Gold | Pueblo Viejo      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Percent of interest in mineral resource production sold until initial delivery maximum achieved (as percent) 7.50%    
Initial delivery maximum (in ounces) | ozt 990,000    
Percent of interest in mineral resource production to be delivered thereafter (as percent) 3.75%    
Lagunas Norte, Pierina and Veladero | Silver      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Contract liabilities $ 253    
Lagunas Norte, Pierina and Veladero | Silver | Silver Wheaton Corp.      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Goods deliverable under contract (as percent) 100.00%    
Pascua-Lama | Silver | Silver Wheaton Corp.      
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]      
Contract liabilities $ 253    
Gain (Loss) On Remeasurement Of Liability $ 628