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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% |  |  |  |  |  |

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