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SEGMENT INFORMATION - Reconciliation of Segment Income to Loss from Continuing Operations Before Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disclosure of operating segments [line items] |  |  |  |
Depreciation expense | $ 466 | $ 328 | $ 901 | $ 653
Other cost of sales/amortization | (1,545) | (1,176) | (3,035) | (2,328)
Exploration, evaluation and project expenses not attributable to segments | (98) | (97) | (172) | (170)
General and administrative expenses | (59) | (93) | (113) | (141)
Other income (expense) not attributable to segments | (7) | (38) | (34) | (39)
Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9 | 12 | 59 | 15 | 61
Loss on currency translation | 6 | (75) | (16) | (90)
Closed mine rehabilitation | (16) | (9) | (41) | 0
Income from equity investees | 50 | 10 | 78 | 26
Finance costs, net (includes non-segment accretion) | (118) | (136) | (238) | (269)
Gain on non-hedge derivatives | 0 | 1 | 1 | 3
Income before income taxes | 264 | 40 | 571 | 433
Operating segments |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Depreciation expense | 490 | 320 | 971 | 637
Exploration, evaluation and project expenses not attributable to segments | (15) | (19) | (28) | (28)
Other income (expense) not attributable to segments | (35) | (38) | (74) | (37)
Reconciling items |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Other cost of sales/amortization | (7) | (10) | (16) | (20)
Exploration, evaluation and project expenses not attributable to segments | (83) | (78) | (144) | (142)
General and administrative expenses | (59) | (93) | (113) | (141)
Other income (expense) not attributable to segments | 16 | (9) | 15 | (28)
Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9 | 12 | 59 | 15 | 61
Loss on currency translation | 6 | (75) | (16) | (90)
Closed mine rehabilitation | (16) | (9) | (41) | 0
Income from equity investees | 50 | 10 | 78 | 26
Finance costs, net (includes non-segment accretion) | (106) | (127) | (212) | (243)
Gain on non-hedge derivatives | 0 | 1 | 1 | 3
Gain on interest rate hedges | 0 | 1 | 0 | 2
Unrealized gain (loss) on non-hedge derivatives | 0 | 0 | 1 | 0
Veladero [Member] | Operating segments |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Depreciation expense | 31 | 34 |  | 65
Exploration, evaluation and project expenses not attributable to segments | (1) | (2) |  | (2)
Other income (expense) not attributable to segments | 1 | (1) |  | (1)
Consolidated total [Member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Depreciation expense | 459 | 320 | 884 | 637
Exploration, evaluation and project expenses not attributable to segments | (15) | (19) | (28) | (28)
Other income (expense) not attributable to segments | (35) | (38) | (75) | (37)
Income before income taxes | $ 475 | $ 489 | $ 1,034 | $ 1,129

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