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IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Narrative (Details) |  |  | 3 Months Ended | 5 Months Ended | 6 Months Ended | 7 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 09, 2017 USD ($) | Mar. 28, 2017 USD ($) | Dec. 31, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Dec. 31, 2015 USD ($) | May 31, 2016 | Dec. 31, 2017 USD ($) | Jun. 30, 2017 | Dec. 31, 2016 USD ($) $ / pound | Dec. 31, 2017 USD ($) $ / pound $ / ounce | Dec. 31, 2016 USD ($) $ / ounce | Sep. 30, 2017 USD ($)
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | $ (212,000,000) | $ (250,000,000) |
Estimated change in WACC (as percent) |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |
Cerro Casale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss (reversal of loss) |  |  |  | $ (1,120,000,000) |  |  |  |  |  |  |  |  |  |
Implied fair value from consideration received in deconsolidation |  | $ 1,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | $ (224,000,000) | (250,000,000) |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |
Zaldívar |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest in subsidiary |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |
Zaldívar | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recoverable amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 950,000,000
Zaldívar | Non-current assets | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  | $ 49,000,000 |  |  |  |  |  |  |  |
Zaldívar | Goodwill | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  | $ 427,000,000 |  |  |  |  |  |  |  |
Bulyanhulu |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated change in WACC (as percent) |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |
Bulyanhulu | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | $ 740,000,000 | 0 |
Veladero | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  | $ (259,000,000) |  |  |  |  |  |  |  |  |  |  |
Recoverable amount |  |  | 747,000,000 |  | 1,600,000,000 |  |  |  | $ 747,000,000 |  | $ 1,600,000,000 | 747,000,000 | 1,600,000,000 |
Veladero | Non-current assets | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  | $ (275,000,000) |  |  |  |  |  |  |  |  |
Lagunas Norte | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 | (28,000,000) |
Recoverable amount |  |  |  |  |  |  | $ 630,000,000 |  |  |  |  |  |  |
Lagunas Norte | Non-current assets | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  | $ (28,000,000) |  |  |  |  |  |  |
Pascua-Lama | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | 407,000,000 | $ 0 |
Pascua-Lama | Non-current assets | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  | (429,000,000) |  |  |  |  |  |  |  |  |  |  |
Recoverable amount |  |  | 850,000,000 |  |  |  |  |  | 850,000,000 |  |  | $ 850,000,000 |  |
Copper |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty tax rate |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / pound |  |  |  |  |  |  |  |  |  |  |  | 0.25 |  |
Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated mineral price in year two and more measurement of fair value less costs of disposal | $ / ounce |  |  |  |  |  |  |  |  |  |  |  |  | 1,200 |
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce |  |  |  |  |  |  |  |  |  |  |  | 100 |  |
Gold | Bulyanhulu |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce |  |  |  |  |  |  |  |  |  |  |  | 100 |  |
Acacia Mining PLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest in subsidiary |  |  |  |  |  |  |  |  |  |  |  | 63.90% |  |
Acacia Mining PLC | Bulyanhulu | Non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  | (740,000,000) |  |  |  |  |  |  |  |  | $ 0 |  |
Recoverable amount |  |  | $ 600,000,000 |  |  |  |  |  | $ 600,000,000 |  |  | $ 600,000,000 |  |
Recoverable amount of asset or cash generating unit, percent of asset basis |  |  | 100.00% |  |  |  |  |  | 100.00% |  |  | 100.00% |  |
Pascua-Lama |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated change in mineral price used in current measurement of fair value less cost of disposal (as a percent) |  |  | (10.00%) |  |  |  |  |  | (10.00%) |  |  | (10.00%) |  |
Pueblo Viejo |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest in subsidiary |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |
Cerro Casale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest sold | 25.00% | 25.00% |  |  |  |  |  |  |  |  |  | 25.00% |  |
Proportion of ownership in joint operation | 50.00% |  |  |  |  |  |  |  |  |  |  | 50.00% |  |
Implied fair value from consideration received in deconsolidation | $ 1,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Economic interest in subsidiary | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Price Range One | Copper |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty tax rate |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |
Copper price | $ / pound |  |  |  |  |  |  |  |  |  |  | 2.04 |  |  |
Price Range Two | Copper |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty tax rate |  |  |  |  |  |  |  |  |  |  | 5.00% |  |  |
Price Range Three | Copper |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty tax rate |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |
Copper price | $ / pound |  |  |  |  |  |  |  |  |  |  | 2.72 |  |  |
Minimum | Lumwana | Non-current assets | Individual assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | $ (303,000,000) |  |
Minimum | Price Range Two | Copper |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Copper price | $ / pound |  |  |  |  |  |  |  |  |  |  | 2.04 |  |  |
Maximum | Price Range Two | Copper |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Copper price | $ / pound |  |  |  |  |  |  |  |  |  |  | 2.72 |  |  |
$100 Decrease in Gold Price | Gold | Bulyanhulu |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | 172,000,000 |  |
$100 Decrease in Gold Price | Gold | Lagunas Norte |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | (311,000) |  |
$100 Decrease in Gold Price | Pueblo Viejo | Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | (651,000) |  |
$100 Decrease in Gold Price | Pueblo Viejo | Gold | Non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | 425,000,000 |  |
$100 Increase in Gold Price | Gold | Bulyanhulu |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | (172,000,000) |  |
$100 Increase in Gold Price | Gold | Bulyanhulu | Non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | 63,000,000 |  |
$100 Increase in Gold Price | Pueblo Viejo | Gold |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment (reversals) charges |  |  |  |  |  |  |  |  |  |  |  | 546,000 |  |
Cash-generating units | Bulyanhulu |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  | $ 600,000,000 |  |  |  |  |  | $ 600,000,000 |  |  | 600,000,000 |  |
Cash-generating units | Lumwana |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  | 849,000,000 |  |  |  |  |  | 849,000,000 |  |  | 849,000,000 |  |
Cash-generating units | Lagunas Norte |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  | 458,000,000 |  |  |  |  |  | 458,000,000 |  |  | 458,000,000 |  |
Cash-generating units | Pascua-Lama |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  | 38,000,000 |  |  |  |  |  | 38,000,000 |  |  | 38,000,000 |  |
Cash-generating units | Pueblo Viejo |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  | 3,077,000,000 |  |  |  |  |  | 3,077,000,000 |  |  | 3,077,000,000 |  |
Cash-generating units | At fair value | Pascua-Lama |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  | $ 750,000,000 |  |  |  |  |  | $ 750,000,000 |  |  | $ 750,000,000 |  | $ 850,000,000
Tax contingent liability | Tanzanian Revenue Authority Assessment | Acacia Mining PLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty tax rate |  |  |  |  |  |  |  |  | 4.00% | 6.00% |  |  |  |
Clearing fee on minerals exported |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |

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