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CRITICAL JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS (Details) $ in Millions | 12 Months Ended
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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% |

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