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CONTINGENCIES (Details) - USD ($)
 6 Months Ended
Jul. 15, 2019
Jun. 30, 2019
Jul. 31, 2019
Jul. 18, 2019
Jan. 01, 2019
Dec. 31, 2018
Tethyan Copper Company Pty Limited [Member]            
Disclosure of contingent liabilities [line items]            
Proportion of ownership interest in joint venture   50.00%        
Percent of ownership by other parties in joint ventures   50.00%        
Funds awarded for damages     $ 5,840,000,000      
Compensation for denial of mining lease     4,087,000,000      
Interest compounded on claims     $ 1,753,000,000      
Adjustment to interest rate     1.00%      
Estimated financial effect of contingent assets     $ 0      
Randgold [Member]            
Disclosure of contingent liabilities [line items]            
Tax advances paid to the government $ 43,000,000          
Acacia Mining PLC [Member]            
Disclosure of contingent liabilities [line items]            
Payment to Resolve Outstanding Tax Claims           $ 300,000,000
Initial upfront payment   $ 100,000,000        
MALI | Randgold [Member]            
Disclosure of contingent liabilities [line items]            
Mali tax amount   275,000,000     $ 267,700,000  
Taxes recoverable       $ 60,000,000 41,100,000  
Fair value of taxes recoverable         $ 0.0  
Increase in tax advances accrued $ 17,000,000          
Other environment related contingent liability [member] | Water Quality Review [Member] | Pascua-Lama [Member]            
Disclosure of contingent liabilities [line items]            
Estimated financial effect of contingent liabilities   0        
Tax assessment and criminal charges [Member] | Veladero[Member] [Member]            
Disclosure of contingent liabilities [line items]            
Estimated financial effect of contingent liabilities   $ 0