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NON-CONTROLLING INTERESTS - Activity (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of subsidiaries [line items] |  |
Non-controlling interests, beginning balance | $ 1,781 |
Share of income (loss) | 110 | $ 78
Cash contributed | 24 | 13
Decrease in non-controlling interest |  | 493
Disbursements | (123) | (195)
Non-controlling interests, ending balance | 1,792 | 1,781
Subsidiaries |  |
Disclosure of subsidiaries [line items] |  |
Non-controlling interests, beginning balance | 1,781 | 2,378
Share of income (loss) | 110 | 78
Cash contributed | 24 | 13
Decrease in non-controlling interest |  | (493)
Disbursements | (123) | (195)
Non-controlling interests, ending balance | $ 1,792 | 1,781
Pueblo Viejo |  |
Disclosure of subsidiaries [line items] |  |
Proportion of ownership interests held by non-controlling interests | 40.00% |
Non-controlling interests, beginning balance | $ 1,290 | 1,311
Share of income (loss) | 89 | 118
Cash contributed | 0 | 0
Decrease in non-controlling interest |  | 0
Disbursements | (108) | (139)
Non-controlling interests, ending balance | $ 1,271 | 1,290
Acacia Mining PLC |  |
Disclosure of subsidiaries [line items] |  |
Proportion of ownership interests held by non-controlling interests | 36.10% |
Non-controlling interests, beginning balance | $ 480 | 704
Share of income (loss) | 22 | (211)
Cash contributed | 0 | 0
Decrease in non-controlling interest |  | 0
Disbursements | 0 | (13)
Non-controlling interests, ending balance | $ 502 | 480
Cerro Casale |  |
Disclosure of subsidiaries [line items] |  |
Proportion of ownership interests held by non-controlling interests | 25.00% |
Non-controlling interests, beginning balance | $ 0 | 319
Share of income (loss) | 0 | 173
Cash contributed | 0 | 1
Decrease in non-controlling interest |  | (493)
Disbursements | 0 | 0
Non-controlling interests, ending balance | 0 | 0
Other |  |
Disclosure of subsidiaries [line items] |  |
Non-controlling interests, beginning balance | 11 | 44
Share of income (loss) | (1) | (2)
Cash contributed | 24 | 12
Decrease in non-controlling interest |  | 0
Disbursements | (15) | (43)
Non-controlling interests, ending balance | $ 19 | $ 11

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