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OTHER NON-CURRENT LIABILITIES - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
$ / ounce
ozt
Dec. 31, 2019
USD ($)
Nov. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 28, 2020
USD ($)
Dec. 31, 2018
USD ($)
Sep. 29, 2015
USD ($)
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Borrowings $ 5,155 $ 5,536       $ 5,738  
Proceeds from borrowings, classified as financing activities 0 0          
Revenue 12,595 9,717          
Gain (Loss) On Remeasurement Of Liability $ 104 628          
Proportion of ownership interest in subsidiary 100.00%            
Cost              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Borrowings $ 5,116            
PV Shareholder Loan [Member] | Variable rate              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Basis spread (as percent)     4.00%        
PV Shareholder Loan [Member] | Cost              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Borrowings     $ 1,300        
PV Shareholder Loan Facility I [Member]              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Proceeds from borrowings, classified as financing activities 104            
PV Shareholder Loan Facility I [Member] | Cost              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Borrowings     800        
PV Shareholder Loan Facility II [Member] | Cost              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Borrowings     $ 500        
Pueblo Viejo              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Shareholder loan 42 0          
Revenue $ 1,613 1,409          
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 $ 53 43          
Deposits from customers             $ 610
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%            
Gold[member]              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Revenue $ 11,670 9,186          
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%            
Pascua-Lama | Silver Wheaton Corp.              
Disclosure of Detailed Information About Other Noncurrent Liabilities [Line Items]              
Contract liabilities       $ 148 $ 148    
Gain (Loss) On Remeasurement Of Liability $ 104            
Pascua-Lama | Silver | 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            
Contract liabilities   253     $ 253    
Gain (Loss) On Remeasurement Of Liability   $ 628          
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%