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INVESTMENTS - Reconciliation of Summarized Financial Information to Carrying Value (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of joint ventures [line items]      
Beginning balance $ 10,313 $ 9,455  
Net income 1,516 861  
Ending balance 11,067 10,313  
Carrying value 1,213 1,185  
Jabal Sayid      
Disclosure of joint ventures [line items]      
Beginning balance 114    
Net income 52 3  
Investments accounted for using equity method, dividend 0    
Ending balance 166 114  
Barrick's share of net assets (50%) 83    
Equity earnings adjustment 0    
Goodwill recognition 123    
Carrying value 206 180 $ 178
Loans receivable from related party $ 165    
Economic interest in joint venture 50.00%    
Zaldívar      
Disclosure of joint ventures [line items]      
Beginning balance $ 1,967    
Net income 122 55  
Investments accounted for using equity method, dividend (120)    
Ending balance 1,969 1,967  
Barrick's share of net assets (50%) 985    
Equity earnings adjustment (10)    
Goodwill recognition 0    
Carrying value $ 975 $ 974 $ 990
Economic interest in joint venture 50.00%