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FINANCIAL INSTRUMENTS - Debt Interest Costs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 343 | $ 436
Borrowing costs capitalised | (24) | (14)
Interest | 319 | 422
Deposits on Pascua-Lama silver sale agreement (note 29) |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 1 | $ 70
Effective rate (as percent) | 0.53% | 8.75%
Deposits on Pueblo Viejo gold and silver streaming agreement (note 29) |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 33 | $ 34
Effective rate (as percent) | 6.44% | 6.79%
5.7% notes |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 49 | $ 49
Effective rate (as percent) | 5.73% | 5.74%
3.85%/5.25% notes |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 41 | $ 53
Effective rate (as percent) | 5.31% | 4.87%
5.80% notes |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 23 | $ 23
Effective rate (as percent) | 5.84% | 5.87%
6.35% notes |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 38 | $ 38
Effective rate (as percent) | 6.39% | 6.41%
Other fixed rate notes |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 70 | $ 77
Effective rate (as percent) | 6.38% | 6.33%
Capital leases |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 5 | $ 6
Effective rate (as percent) | 6.09% | 7.14%
Other debt obligations |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 34 | $ 34
Effective rate (as percent) | 6.16% | 6.17%
Five Point Seven Five Notes [Member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 49 | $ 49
Effective rate (as percent) | 5.77% | 5.79%
Acacia Credit Facility |  |
Disclosure of detailed information about borrowings [line items] |  |
Interest cost | $ 0 | $ 3
Effective rate (as percent) | 0.00% | 3.36%

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