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FINANCIAL INSTRUMENTS - Debt and Interest (Details) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 02, 2013 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2011 | Oct. 16, 2009
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | $ 6,423,000,000 | $ 7,931,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | (687,000,000) | (1,533,000,000) |  |  |  |
Amortization and other |  | 2,000,000 | 25,000,000 |  |  |  |
Borrowings |  | 5,738,000,000 | 6,423,000,000 | $ 7,931,000,000 |  |  |
Less: current portion |  | (43,000,000) | (59,000,000) | 143,000,000 |  |  |
Non-current portion of non-current borrowings |  | 5,695,000,000 | 6,364,000,000 | 7,788,000,000 |  |  |
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 |  | (687,000,000) | (1,533,000,000) |  |  |  |
Gross amount |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 5,747,000,000 |  |  |  |  |
BNAF Notes Due 2021 and 2041 |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 1,468,000,000 | 1,467,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | (629,000,000) | 0 |  |  |  |
Amortization and other |  | 3,000,000 | 1,000,000 |  |  |  |
Borrowings |  | 842,000,000 | 1,468,000,000 | 1,467,000,000 |  |  |
BNAF Notes Due 2021 |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 629,000,000 |  |  |  |  |
Repayments |  | 0 | (721,000,000) |  |  |  |
Borrowings |  | 0 | 629,000,000 |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  | 4.40% |
BNAF Notes Due 2041 |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 850,000,000 |  |  |  |  |
Borrowings |  | 850,000,000 | 850,000,000 |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  | 5.70% |
3.85%/5.25% notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 1,079,000,000 | 1,078,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | 0 | 0 |  |  |  |
Amortization and other |  | 0 | 1,000,000 |  |  |  |
Borrowings |  | 1,079,000,000 | 1,079,000,000 | 1,078,000,000 |  |  |
5.80% notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 395,000,000 | 395,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | 0 | 0 |  |  |  |
Amortization and other |  | 0 | 0 |  |  |  |
Borrowings |  | 395,000,000 | 395,000,000 | 395,000,000 |  |  |
Notional amount |  | $ 400,000,000 | 400,000,000 |  |  |  |
Borrowings, interest rate (as percent) |  | 580.00% |  |  |  |  |
6.35% notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | $ 593,000,000 | 593,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | 0 | 0 |  |  |  |
Amortization and other |  | 1,000,000 | 0 |  |  |  |
Borrowings |  | 594,000,000 | 593,000,000 | 593,000,000 |  |  |
Notional amount |  | $ 600,000,000 | 600,000,000 |  |  |  |
Borrowings, interest rate (as percent) |  | 635.00% |  |  |  |  |
Other fixed rate notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | $ 1,326,000,000 | 1,607,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | 0 | (279,000,000) |  |  |  |
Amortization and other |  | 0 | (2,000,000) |  |  |  |
Borrowings |  | 1,326,000,000 | 1,326,000,000 | 1,607,000,000 |  |  |
BPDAF notes due 2019 |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 248,000,000 |  |  |  |  |
Repayments |  |  | (152,000,000) |  |  |  |
Borrowings |  | 248,000,000 | 248,000,000 |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  |  | 4.95%
BNAF notes due 2038 |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 250,000,000 |  |  |  |  |
Borrowings |  | 250,000,000 | 250,000,000 |  |  |  |
BPADF Notes Due 2039 |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 850,000,000 |  |  |  |  |
Borrowings |  | 850,000,000 | 850,000,000 |  |  |  |
Borrowings, interest rate (as percent) |  |  |  |  |  |  | 5.95%
Pueblo Viejo Project financing |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 0 | 400,000,000 |  |  |  |
Proceeds |  |  | 0 |  |  |  |
Repayments |  |  | (423,000,000) |  |  |  |
Amortization and other |  |  | 23,000,000 |  |  |  |
Borrowings |  |  | 0 | 400,000,000 |  |  |
Capital leases |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 46,000,000 | 114,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | (27,000,000) | (68,000,000) |  |  |  |
Amortization and other |  | 0 | 0 |  |  |  |
Borrowings |  | 19,000,000 | 46,000,000 | 114,000,000 |  |  |
Less: current portion |  | (11,000,000) | (27,000,000) |  |  |  |
Pascua-Lama Capital Lease |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 13,000,000 |  |  |  |  |
Borrowings |  | 9,000,000 | 13,000,000 |  |  |  |
Laguna Norte Capital Lease |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 27,000,000 |  |  |  |  |
Borrowings |  | 7,000,000 | 27,000,000 |  |  |  |
Other debt obligations |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 603,000,000 | 609,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | (3,000,000) | (4,000,000) |  |  |  |
Amortization and other |  | (2,000,000) | (2,000,000) |  |  |  |
Borrowings |  | 598,000,000 | 603,000,000 | 609,000,000 |  |  |
Less: current portion |  | (4,000,000) | (4,000,000) |  |  |  |
Other debt obligations | Gross amount |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 5,000,000 |  |  |  |  |
4.10%/5.75% notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 842,000,000 | 1,569,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | 0 | 731,000,000 |  |  |  |
Amortization and other |  | 0 | (4,000,000) |  |  |  |
Borrowings |  | 842,000,000 | 842,000,000 | 1,569,000,000 |  |  |
Notional amount |  | 850,000,000 | 850,000,000 |  |  |  |
4.10%/5.75% notes | Gross amount |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings | $ 3,000,000,000 |  |  |  |  |  |
Acacia Credit Facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | 71,000,000 | 99,000,000 |  |  |  |
Proceeds |  | 0 | 0 |  |  |  |
Repayments |  | (28,000,000) | (28,000,000) | (29,000,000) | $ (14,000,000) |  |
Amortization and other |  | 0 | 0 |  |  |  |
Borrowings |  | 43,000,000 | 71,000,000 | $ 99,000,000 |  |  |
Less: current portion |  | (28,000,000) | $ (28,000,000) |  |  |  |
Acacia Credit Facility | Gross amount |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Borrowings |  | $ 42,000,000 |  |  |  |  |

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