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STOCK-BASED COMPENSATION - Narrative (Details)
shares in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
USD ($)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Intrinsic value of options exercised $ 0 $ 0  
Unrecognized compensation cost 0 0  
Global Employee Share Plan (GESP)      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expense (recovery) from share-based payment transactions with employees 12,000,000    
RSUs      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expense (recovery) from share-based payment transactions with employees $ 29,000,000 $ 42,000,000  
Vesting period 3 years    
Weighted average remaining contractual life 340 days 1 year 69 days  
Number of units outstanding (shares) | shares 3,751,000 4,537,000 6,452,000
Fair value of shares outstanding $ 36,000,000 $ 37,700,000 $ 58,600,000
RSUs | Acacia Mining PLC      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Fair value of shares outstanding $ 2,000,000 $ 2,000,000  
RSUs | Minimum      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Vesting period 2 years 6 months    
RSUs | Maximum      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Vesting period 3 years    
DSUs      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Maximum election amount of required annual retainer 100.00%    
Number of units outstanding (shares) | shares 764,000 725,000 573,000
Fair value of shares outstanding $ 11,200,000 $ 11,600,000 $ 9,200,000
DSUs | Acacia Mining PLC      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Fair value of shares outstanding $ 0 $ 0  
PGSUs      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Number of units outstanding (shares) | shares 3,024 2,174  
Fair value of shares outstanding $ 18,000,000 $ 14,000,000  
ESPP      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expense (recovery) from share-based payment transactions with employees 100,000 400,000  
Barrick Share Purchase Plan (BSPP) [Member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expense (recovery) from share-based payment transactions with employees 2,000,000    
Stock options      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Expense (recovery) from share-based payment transactions with employees $ 0 $ 0  
Vesting period 4 years    
Exercise period 7 years    
Number of shares available for grant (shares) | shares 800 1,000