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SIGNIFICANT JUDGMENTS, ESTIMATES, ASSUMPTIONS AND RISKS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items] |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 3,743 | $ 2,153 | $ 3,743 | $ 2,153 | $ 3,327 | $ 3,314 | $ 2,153 | $ 1,571
Line of Credit Facility, Maximum Borrowing Capacity1 | 3,000 |  | 3,000 |  |  |  |  |
Pascua-Lama | Argentina |  |  |  |  |  |  |  |
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items] |  |  |  |  |  |  |  |
Value added tax receivables | 63 |  | 63 |  |  | 72 |  |
Pascua-Lama | Chile |  |  |  |  |  |  |  |
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items] |  |  |  |  |  |  |  |
Amounts received from VAT refunds | 394 |  | 394 |  |  | $ 424 |  |
Revenue, performance obligation | 3,538 |  | 3,538 |  |  |  |  |
Provision for decommissioning, restoration and rehabilitation costs [member] |  |  |  |  |  |  |  |
Disclosure of Detailed Information About Accounting Judgments and Estimates [Line Items] |  |  |  |  |  |  |  |
Increase (decrease) in other provisions | $ 0 | $ 69 | $ 136 | $ 271 |  |  |  |

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