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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