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FINANCIAL INSTRUMENTS - Debt and Interest (Details) - USD ($)
 12 Months Ended
Jan. 31, 2020
May 02, 2013
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2011
Oct. 16, 2009
Disclosure of detailed information about borrowings [line items]                  
Borrowings     $ 5,738,000,000 $ 6,423,000,000          
Proceeds     0 0          
Repayments     (281,000,000) (687,000,000)          
Amortization and other     107,000,000 2,000,000          
Borrowings     5,536,000,000 5,738,000,000 $ 6,423,000,000        
Less: current portion     (375,000,000) (43,000,000) 59,000,000        
Non-current portion of non-current borrowings     5,161,000,000 5,695,000,000 6,364,000,000        
Proceeds from current borrowings     0 0          
Proceeds from non-current borrowings     0 0          
Less: Repayments of current borrowings     0 0          
Repayments of non-current borrowings     (309,000,000) (687,000,000)          
Gross amount                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     5,467,000,000            
BNAF Notes Due 2021 and 2041                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     842,000,000 1,468,000,000          
Proceeds     0 0          
Repayments     0 (629,000,000)          
Amortization and other     0 3,000,000          
Borrowings     842,000,000 842,000,000 1,468,000,000        
BNAF Notes Due 2021                  
Disclosure of detailed information about borrowings [line items]                  
Repayments       0   $ (721,000,000)      
Borrowings, interest rate (as percent)               4.40%  
BNAF Notes Due 2041                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     850,000,000            
Borrowings     850,000,000 850,000,000          
Borrowings, interest rate (as percent)               5.70%  
3.85%/5.25% notes                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     1,079,000,000 1,079,000,000          
Proceeds     0 0          
Repayments     0 0          
Amortization and other     0 0          
Borrowings     1,079,000,000 1,079,000,000 1,079,000,000        
Less: current portion     $ (336,000,000) 0          
Borrowings, interest rate (as percent)     385.00%            
5.80% notes                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     $ 395,000,000 395,000,000          
Proceeds     0 0          
Repayments     0 0          
Amortization and other     0 0          
Borrowings     395,000,000 395,000,000 395,000,000        
Notional amount     $ 400,000,000 400,000,000          
Borrowings, interest rate (as percent)     580.00%            
6.35% notes                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     $ 594,000,000 593,000,000          
Proceeds     0 0          
Repayments     0 0          
Amortization and other     0 1,000,000          
Borrowings     594,000,000 594,000,000 593,000,000        
Notional amount     $ 600,000,000 600,000,000          
Borrowings, interest rate (as percent)     635.00%            
Other fixed rate notes                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     $ 1,326,000,000 1,326,000,000          
Proceeds     0 0          
Repayments     (248,000,000) 0          
Amortization and other     2,000,000 0          
Borrowings     1,080,000,000 1,326,000,000 1,326,000,000        
BPDAF notes due 2019                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     248,000,000            
Repayments     (248,000,000)     (152,000,000)      
Borrowings     0 248,000,000          
Borrowings, interest rate (as percent)                 4.95%
BNAF notes due 2038                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     250,000,000            
Borrowings     250,000,000 250,000,000          
BPADF Notes Due 2039                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     850,000,000            
Borrowings     850,000,000 850,000,000          
Borrowings, interest rate (as percent)                 5.95%
Capital leases                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     19,000,000 46,000,000          
Proceeds     0 0          
Repayments     (28,000,000) (27,000,000)          
Amortization and other     105,000,000 0          
Borrowings     96,000,000 19,000,000 46,000,000        
Less: current portion     (25,000,000) (11,000,000)          
Nevada Gold Mines Capital Leases [Member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     0            
Borrowings     32,000,000 0          
Loulo Capital Leases [Member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     0            
Borrowings     32,000,000 0          
Lumwana Capital Lease [Member]                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     3,000,000            
Borrowings     10,000,000 3,000,000          
Pascua-Lama Capital Lease                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     9,000,000            
Borrowings     6,000,000 9,000,000          
Porgera Capital Lease                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     0            
Borrowings     5,000,000 0          
Other debt obligations                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     598,000,000 603,000,000          
Proceeds     0 0          
Repayments     (4,000,000) (3,000,000)          
Amortization and other     0 (2,000,000)          
Borrowings     594,000,000 598,000,000 603,000,000        
Less: current portion     0 (4,000,000)          
Other debt obligations | Gross amount                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     0            
4.10%/5.75% notes                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     842,000,000 842,000,000          
Proceeds     0 0          
Repayments     0 0          
Amortization and other     0 0          
Borrowings     842,000,000 842,000,000 842,000,000        
Notional amount     850,000,000 850,000,000          
4.10%/5.75% notes | Gross amount                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings   $ 3,000,000,000              
Acacia Credit Facility                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     43,000,000 71,000,000          
Proceeds     0 0          
Repayments $ (14,000,000)   (29,000,000) (28,000,000) (28,000,000) $ (29,000,000) $ (14,000,000)    
Amortization and other     0 0          
Borrowings     14,000,000 43,000,000 $ 71,000,000        
Less: current portion     (14,000,000) $ (28,000,000)          
Acacia Credit Facility | Gross amount                  
Disclosure of detailed information about borrowings [line items]                  
Borrowings     14,000,000            
Consolidated total [Member]                  
Disclosure of detailed information about borrowings [line items]                  
Repayments     $ (309,000,000)