XML 202 R121.htm IDEA: XBRL DOCUMENT v3.20.4
IMPAIRMENT AND REVERSAL OF NON-CURRENT ASSETS - Narrative (Details)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Apr. 25, 2020
Jan. 24, 2020
USD ($)
$ / ounce
Jan. 01, 2020
Sep. 17, 2019
shares
Dec. 31, 2020
USD ($)
Sep. 30, 2020
Rate
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Rate
Jun. 30, 2020
Rate
Jun. 30, 2019
USD ($)
Rate
Sep. 30, 2020
Sep. 30, 2019
Rate
Dec. 31, 2020
USD ($)
$ / ounce
Rate
Dec. 31, 2019
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]                                    
Proportion of ownership interest in subsidiary                           100.00%        
Proportion of ownership interests held by non-controlling interests     16.00%                              
Impairment (reversals) charges                           $ (269,000,000) $ (1,423,000,000)      
Non-current assets                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Impairment (reversals) charges                           (269,000,000) (1,423,000,000)      
Bulyanhulu [Member] | Individual assets                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Recoverable amount             $ 1,237,000,000                      
Reversal of impairment loss             663,000,000                      
North Mara [Member] | Individual assets                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Recoverable amount             967,000,000                      
Reversal of impairment loss             46,000,000                      
Pascua-Lama | Individual assets                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Recoverable amount               $ 398,000,000             398,000,000      
Lumwana | Individual assets                                    
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                 10.40%                  
Impairment (reversals) charges                 $ (947,000,000)         $ 0 (947,000,000)      
Fair Value Less Cost of Disposal                 $ 1,400,000,000                  
Nevada Gold Mines [Member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Proportion of ownership interest in subsidiary                           61.50%        
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]                                    
Recoverable amount                                 $ 787,000,000  
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              
Share for share exchange | shares                               0.168 0.153  
Percent of ownership request for consideration | Rate                                 100.00%  
Percent share in economic benefit | Rate                     50.00%              
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                           $ 5,000,000 (865,000,000)      
Risk Premium used for adjustment due to non-financial risk         2.00%                 2.00%        
Porgera                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Recoverable amount         $ 297,000,000                 $ 297,000,000        
Tanzanian Mines [Member]                                    
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     16.00%                              
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity             238,000,000                      
Impairment (reversals) charges                           304,000,000        
Loss (gain) on assignment of shareholder loans             $ 167,000,000                      
Tanzanian 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                           $ (304,000,000) 0      
Loulo Gounkoto                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Proportion of ownership interest in subsidiary                           80.00%        
Proportion of ownership interests held by non-controlling interests                           20.00%        
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%
Duty on export | Rate                                   5.00%
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     3.00 2.85                
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      
Acacia Mining PLC                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Proportion of ownership interest in subsidiary         100.00%     100.00%       63.90%   84.00%        
Proportion of ownership interests held by non-controlling interests       36.10%                            
Share for share exchange | shares       0.168                            
Pueblo Viejo                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Proportion of ownership interest in subsidiary                           60.00%        
Proportion of ownership interests held by non-controlling interests                           40.00%        
Porgera                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Proportion of ownership interest in subsidiary 47.50%                                  
Minimum | Tanzanian Mines [Member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
NAV multiple   $ 1.1                                
Weighted average cost of capital, significant unobservable inputs, assets   5.40%                                
Maximum | Tanzanian Mines [Member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
NAV multiple   $ 1.3                                
Weighted average cost of capital, significant unobservable inputs, assets   6.20%                                
Long-term [Member] | Tanzanian Mines [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                                
Long-term [Member] | 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                           1,400 1,300      
Short-term [Member] | Tanzanian Mines [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   1,350                                
Short-term [Member] | 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                           1,700 1,350      
$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        
$100 Decrease in Gold Price | Loulo Gounkoto | Gold[member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Estimated Fair Value of Asset Impairment         $ 493,000,000                 $ 493,000,000        
$100 Decrease in Gold Price | Veladero [Member] | Gold[member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Estimated Fair Value of Asset Impairment         207,000,000                 $ 207,000,000        
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 | Veladero [Member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Recoverable amount         779,000,000                 $ 779,000,000        
Cash-generating units | Loulo Gounkoto                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Recoverable amount         4,187,000,000                 4,187,000,000        
One percent increase in WACC [Member] | Veladero [Member] | Gold[member]                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
Estimated Fair Value of Asset Impairment         $ 134,000,000                 $ 134,000,000        
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%        
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%        
Minimum | Acacia Mining PLC                                    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]                                    
NAV 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]                                    
NAV multiple                     $ 1.1              
Weighted average cost of capital, significant unobservable inputs, assets | Rate                     6.90%