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FINANCIAL INSTRUMENTS - Debt and Interest (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2020 | May 02, 2013 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2012 | Oct. 16, 2009
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 5,536 | $ 5,738 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | (353) | (281) |  |  |  |  |  |
Amortization and other |  |  | (2) | 107 |  |  |  |  |  |
Borrowings |  |  | 5,155 | 5,536 | $ 5,738 |  |  |  |  |
Debt (note 25b) |  |  | (20) | (375) | (43) |  |  |  |  |
Non-current portion of non-current borrowings |  |  | 5,135 | 5,161 | 5,695 |  |  |  |  |
Proceeds from current borrowings |  |  | 0 | 0 |  |  |  |  |  |
Proceeds from non-current borrowings |  |  | 0 | 0 |  |  |  |  |  |
Less: Repayments of current borrowings |  |  | 0 | 0 |  |  |  |  |  |
Repayments of non-current borrowings |  |  | (379) | (309) |  |  |  |  |  |
Gross amount |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 5,116 |  |  |  |  |  |  |
3.85%/5.25% notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 1,079 | 1,079 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | (337) | 0 |  |  |  |  |  |
Amortization and other |  |  | 2 | 0 |  |  |  |  |  |
Borrowings |  |  | 744 | 1,079 | 1,079 |  |  |  |  |
Debt (note 25b) |  |  | $ 0 | (336) |  |  |  |  |  |
Borrowings, interest rate (as percent) |  |  | 385.00% |  |  |  |  |  |  |
5.80% notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 395 | 395 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | 0 | 0 |  |  |  |  |  |
Amortization and other |  |  | 0 | 0 |  |  |  |  |  |
Borrowings |  |  | 395 | 395 | 395 |  |  |  |  |
Notional amount |  |  | $ 400 | 400 |  |  |  |  |  |
Borrowings, interest rate (as percent) |  |  | 580.00% |  |  |  |  |  |  |
6.35% notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 594 | 594 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | 0 | 0 |  |  |  |  |  |
Amortization and other |  |  | 0 | 0 |  |  |  |  |  |
Borrowings |  |  | 594 | 594 | 594 |  |  |  |  |
Notional amount |  |  | $ 600 | 600 |  |  |  |  |  |
Borrowings, interest rate (as percent) |  |  | 635.00% |  |  |  |  |  |  |
Other fixed rate notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 1,080 | 1,326 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | 0 | (248) |  |  |  |  |  |
Amortization and other |  |  | 1 | 2 |  |  |  |  |  |
Borrowings |  |  | 1,081 | 1,080 | 1,326 |  |  |  |  |
5.7% notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 842 | 842 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | 0 | 0 |  |  |  |  |  |
Amortization and other |  |  | 0 | 0 |  |  |  |  |  |
Borrowings |  |  | 842 | 842 | 842 |  |  |  |  |
Notional amount |  |  | 850 | 850 |  |  |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  |  |  |  | 5.70% |
BPDAF notes due 2019 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Repayments |  |  | (248) |  |  | $ (152) |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  |  |  |  |  | 4.95%
BNAF notes due 2038 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 250 |  |  |  |  |  |  |
Borrowings |  |  | 250 | 250 |  |  |  |  |  |
BPADF Notes Due 2039 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 850 |  |  |  |  |  |  |
Borrowings |  |  | 850 | 850 |  |  |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  |  |  |  |  | 5.95%
Capital leases |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 96 | 19 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | (26) | (28) |  |  |  |  |  |
Amortization and other |  |  | (4) | 105 |  |  |  |  |  |
Borrowings |  |  | 66 | 96 | 19 |  |  |  |  |
Debt (note 25b) |  |  | (13) | (25) |  |  |  |  |  |
Nevada Gold Mines Capital Leases [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 32 |  |  |  |  |  |  |
Borrowings |  |  | 18 | 32 |  |  |  |  |  |
Loulo Capital Leases [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 32 |  |  |  |  |  |  |
Borrowings |  |  | 28 | 32 |  |  |  |  |  |
Lumwana Capital Lease [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 10 |  |  |  |  |  |  |
Borrowings |  |  | 8 | 10 |  |  |  |  |  |
Pascua-Lama Capital Lease |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 6 |  |  |  |  |  |  |
Borrowings |  |  | 2 | 6 |  |  |  |  |  |
Porgera Capital Lease |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 5 |  |  |  |  |  |  |
Borrowings |  |  | 2 | 5 |  |  |  |  |  |
Other debt obligations |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 594 | 598 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | (2) | (4) |  |  |  |  |  |
Amortization and other |  |  | (2) | 0 |  |  |  |  |  |
Borrowings |  |  | 590 | 594 | 598 |  |  |  |  |
Debt (note 25b) |  |  | (7) | 0 |  |  |  |  |  |
4.10%/5.75% notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 842 | 842 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments |  |  | 0 | 0 |  |  |  |  |  |
Amortization and other |  |  | 1 | 0 |  |  |  |  |  |
Borrowings |  |  | 843 | 842 | 842 |  |  |  |  |
Notional amount |  |  | 850 | 850 |  |  |  |  |  |
4.10%/5.75% notes | Gross amount |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  | $ 3,000 |  |  |  |  |  |  |  |
Acacia Credit Facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 14 | 43 |  |  |  |  |  |
Proceeds |  |  | 0 | 0 |  |  |  |  |  |
Repayments | $ (14) |  | (14) | (29) | (28) | $ (28) | $ (29) | $ (14) |  |
Amortization and other |  |  | 0 | 0 |  |  |  |  |  |
Borrowings |  |  | 0 | 14 | $ 43 |  |  |  |  |
Debt (note 25b) |  |  | 0 | (14) |  |  |  |  |  |
Total notes and leases [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Repayments |  |  | $ (379) | $ (309) |  |  |  |  |  |

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