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IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Impairment Losses (Reversals) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | $ (269) | $ (1,423)
Impairment reversals (note 10) |  | (269) | (1,423)
Tanzanian Mines [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 304 |
Impairment reversals (note 10) |  | 304 |
Individual assets | Tanzanian Mines [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | (304) | 0
Impairment reversals (note 10) |  | (304) | 0
Individual assets | Cortez |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 10 | 57
Impairment reversals (note 10) |  | 10 | 57
Individual assets | Pueblo Viejo |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 5 | (865)
Impairment reversals (note 10) |  | 5 | (865)
Individual assets | Lumwana |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges | $ (947) | 0 | (947)
Impairment reversals (note 10) | $ (947) | 0 | (947)
Individual assets | Pascua-Lama |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 296
Impairment reversals (note 10) |  | 0 | 296
Individual assets | Lagunas Norte [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 12
Impairment reversals (note 10) |  | 0 | 12
Individual assets | Golden Sunlight [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 9
Impairment reversals (note 10) |  | 0 | 9
Individual assets | Veladero [Member] |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 0 | 3
Impairment reversals (note 10) |  | 0 | 3
Individual assets | Other |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 8 | 12
Impairment reversals (note 10) |  | 8 | 12
Intangible assets and goodwill |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | 12 | 0
Impairment reversals (note 10) |  | 12 | 0
Impairment (reversals) of long lived assets |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment (reversals) charges |  | (269) | (1,423)
Impairment reversals (note 10) |  | $ (269) | $ (1,423)

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