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INCOME TAX EXPENSE - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Net currency translation losses on deferred tax balances |  |  | $ 41 | $ 10 |  |
Change in tax rate, deferred tax recovery | $ 343 |  |  |  |  |
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense | (228) |  | 49 | 0 |  |
Income tax expense (recovery) |  |  | $ 1,198 | $ 1,231 |  |
Tax rate effect from change in tax rate |  |  | 21.00% | 35.00% |  |
Deferred tax asset on AMT credit to offset liability |  |  | $ 88 |  |  |
Increase in provisional liability | 252 |  |  |  |  |
Provisional income tax expense | 150 |  |  |  |  |
Deferred tax expense, undistributed foreign earnings | 102 |  |  |  |  |
Deferred tax liability, non-current |  |  | 122 |  |  |
Withholding taxes paid |  |  | 28 |  |  |
Current tax expense (income) |  |  | 423 | $ 1,125 |  |
Acacia Mining PLC |  |  |  |  |  |
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Income tax expense (recovery) |  |  |  |  | $ 70 | $ 128
Foreign income tax liability | $ 300 |  |  | 300 |  |
Current tax expense (income) |  | $ 172 |  |  |  |
UNITED STATES |  |  |  |  |  |
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Deferred tax expense (income) |  |  | 107 |  |  |
Argentina |  |  |  |  |  |
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Deferred tax expense (income) |  |  | 41 | $ 10 |  |
CANADA |  |  |  |  |  |
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Deferred tax expense (income) |  |  | 0 |  |  |
PERU |  |  |  |  |  |
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Deferred tax expense (income) |  |  | 0 |  |  |
Pueblo Viejo [Member] |  |  |  |  |  |
Disclosure Of Major Components Of Tax Expense (Income) [Line Items] |  |  |  |  |  |
Deferred tax expense (income) |  |  | 37 |  |  |
Current tax expense (income) |  |  | $ 5 |  |  |

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