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IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Narrative (Details)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jan. 24, 2020
Rate
Jan. 01, 2020
Rate
Sep. 17, 2019
Rate
shares
Oct. 19, 2017
Dec. 31, 2019
USD ($)
Rate
Sep. 30, 2019
Rate
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Rate
Jun. 30, 2019
USD ($)
Rate
Jun. 30, 2018
USD ($)
$ / ounce
Rate
Dec. 31, 2017
Jun. 30, 2017
Sep. 30, 2019
Rate
Sep. 16, 2019
Dec. 31, 2019
USD ($)
$ / ounce
ozt
Rate
Dec. 31, 2018
USD ($)
$ / ounce
Jul. 19, 2019
shares
May 21, 2019
USD ($)
Rate
shares
Sep. 28, 2018
Rate
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             $ (1,423,000,000) $ 900,000,000      
Percent of ownership request for consideration | Rate                                   100.00%  
Proportion of ownership interests held by non-controlling interests   16.00%                                  
Non-current assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             (1,423,000,000) 746,000,000      
Goodwill                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             0 154,000,000      
Nevada Gold Mines [Member] | Individual assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             $ 60,000,000        
Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Share for share exchange | shares                                 0.168 0.153  
Proportion of ownership interests held by non-controlling interests | Rate                 36.10%                    
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal                 1,250                    
Percent share in economic benefit | Rate                 50.00%                    
Recoverable amount                                   $ 787,000,000  
Veladero                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Duty on export | Rate         12.00%                   12.00%        
Capped price per USD export         $ 4.00                   $ 4.00        
Veladero | Individual assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             3,000,000 246,000,000      
Gains (losses) on subsequent increase in fair value less costs to sell not in excess of recognised cumulative impairment loss or write-down to fair value less costs to sell                             674,000,000        
Veladero | Goodwill                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             $ 0 154,000,000      
Percentage of entity's revenue | Rate                             1.50%        
Lagunas Norte | Individual assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Discount rate used in current measurement of fair value less costs of disposal | Rate         3.80%                   3.80%        
Impairment (reversals) charges             $ 405,000,000               $ 12,000,000 405,000,000      
Fair Value Less Cost of Disposal             $ 150,000,000                        
Estimated gold price         $ 1,200                   1,200        
Lagunas Norte | Inventories [member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             166,000,000        
Estimated gold price         $ 1,250                   1,250        
Lumwana | Individual assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             (947,000,000) 0      
Fair Value Less Cost of Disposal                             $ 1,400,000,000        
Weighted average cost of capital, significant unobservable inputs, assets                             10.40%        
Pueblo Viejo | Individual assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             $ (865,000,000) $ 0      
Risk Premium used for adjustment due to non-financial risk         2.00%                   2.00%        
Gold[member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | $ / ounce                             1,300 1,250      
Pascua-Lama | Individual assets                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                             $ 296,000,000        
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal                             398,000,000        
Lumwana                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Increase in royalty rate | Rate                                     1.50%
Royalty on copper production | Rate                                     10.00%
Change in royalty rate | Rate                             1.50%        
Duty on export | Rate         5.00%                   5.00%       5.00%
Royalty tax rate | Rate                             10.00%        
Lumwana | Copper                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | Rate           3.00     2.85                    
Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Discount rate used in current measurement of fair value less costs of disposal | Rate         11.00%                   11.00%        
Share for share exchange | shares     0.168                                
Proportion of ownership interests held by non-controlling interests     36.10%                       0.00%        
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal                   1,200                  
Proportion of Ownership Interest Sold | Rate 16.00%                                    
Proportion of ownership interest in subsidiary   84.00% 100.00%   100.00%               63.90% 63.90%          
Pueblo Viejo                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Proportion of ownership interests held by non-controlling interests                             40.00%        
Proportion of ownership interest in subsidiary                             60.00%        
Minimum | Gold[member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Discount rate used in current measurement of fair value less costs of disposal         3.00%                   3.00% 4.00%      
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | ozt                             20        
Maximum | Gold[member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Discount rate used in current measurement of fair value less costs of disposal         7.00%                   7.00% 11.00%      
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | ozt                             30        
$100 Decrease in Gold Price | Gold[member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce                             100        
Estimated Fair Value of Asset Impairment         $ 529,000,000                   $ 529,000,000        
$100 Decrease in Gold Price | Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges                   $ 98                  
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | $ / ounce                   100                  
$0.25 increase in copper                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated Fair Value of Asset Impairment         390,000,000                   $ 390,000,000        
$100 Increase in Gold Price | Gold[member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce                             100        
Estimated Fair Value of Asset Impairment         246,000,000                   $ 246,000,000        
$100 Increase in Gold Price | Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | $ / ounce                   100                  
Estimated change in WACC (as percent) | Rate                   1.00%                  
$0.25 decrease in copper                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | $ / ounce                             0        
Estimated Fair Value of Asset Impairment         390,000,000                   $ 390,000,000        
Negative Ten Percent change in Gold and Silver [Member] | Pascua-Lama                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated Mineral Price For Measurement Of Fair Value Less Costs Of Disposal | $ / ounce                             0        
Estimated Fair Value of Asset Impairment         40,000,000                   $ 40,000,000        
Increase/decrease in gold/copper price [Member] | Copper                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce                             0.25        
Increase/decrease in gold/copper price [Member] | Gold[member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated change in mineral price (gold, in dollars per ounce; copper, in dollars per pound) | $ / ounce                             100        
Cash-generating units | Bulyanhulu                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Recoverable amount         579,000,000                   $ 579,000,000        
Cash-generating units | Lumwana                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Recoverable amount         $ 1,307,000,000                   $ 1,307,000,000        
Tax contingent liability [member] | Tanzanian Revenue Authority Assessment | Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Economic Benefit Shared With Government 5000.00%     5000.00%                              
Proportion of ownership interests held by non-controlling interests       16.00%                              
Royalty tax rate                     4.00% 6.00%              
Clearing fee on minerals exported                     1.00%                
OreCorp [Member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges               $ 24                      
Recoverable amount               10   $ 10                  
Proportion of Ownership Interest Sold | Rate                   51.00%                  
Future consideration to be received               7   $ 7                  
Net smelter royalty capped               15   $ 15                  
Proportion of ownership in joint operation | Rate                   49.00%                  
Consideration paid (received)                   $ 3                  
Kabanga [Member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Impairment (reversals) charges               $ 30,000,000                      
Proportion of ownership interest in associate | Rate               50.00%                      
One percent decrease in WACC [Member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Weighted average cost of capital, significant unobservable inputs, assets | Rate                             1.00%        
One percent increase in WACC [Member] | Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Estimated change in WACC (as percent) | Rate                   1.00%                  
One percent increase/decrease in WACC [Member]                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Weighted average cost of capital, significant unobservable inputs, assets | Rate                             1.00%        
Minimum | Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Net assets value multiple                 $ 1.0                    
Weighted average cost of capital, significant unobservable inputs, assets | Rate                 6.50%                    
Maximum | Acacia Mining PLC                                      
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                      
Net assets value multiple                 $ 1.1                    
Weighted average cost of capital, significant unobservable inputs, assets | Rate                 6.90%