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Acquisitions and disposals (Detail)
shares in Millions, $ in Millions
 11 Months Ended 12 Months Ended
Nov. 30, 2023
USD ($)
facility
Aug. 28, 2023
USD ($)
Oct. 17, 2022
USD ($)
shares
Aug. 31, 2022
USD ($)
Mar. 29, 2022
USD ($)
Nov. 18, 2021
Nov. 17, 2021
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
Nov. 08, 2023
USD ($)
Dec. 16, 2022
USD ($)
Disclosure Of Acquisitions And Disposals [Line Items]                          
Attributable to non-controlling interests               $ 1,755 $ 2,107 [1] $ 2,107 [1]      
Acquisition of joint venture               834 850   $ 0    
Payments from changes in ownership interests in subsidiaries that do not result in loss of control [2]               33 2,961   0    
Sales of property, plant and equipment and intangible assets               9 0   61    
Proceeds from disposal of exploration and evaluation assets               $ 88 1   $ 7    
La Granja                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Proportion of interest sold               55.00%          
Percentage owned   45.00%                      
Pre-tax gain               $ 154          
First Quantum | La Granja                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Proportion of interest sold   55.00%                      
Proceeds from sale   $ 105                      
Working capital balance in project completion   1                      
Net consideration   104                      
Sales of property, plant and equipment and intangible assets   16                      
Proceeds from disposal of exploration and evaluation assets   88                      
Gain on fair value of interest retained   85                      
Profit relating to interest in undeveloped projects   47                      
Remaining gain eliminated against the fair value of the EAU   38                      
Pre-tax gain   $ 154                      
Canada                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Consideration for sale     $ 150                    
Proceeds from sale     $ 80                    
Canada | Uranium Energy Corp                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Shares received (in shares) | shares     70                    
McEwen Copper Inc.                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Purchase of interests in associates       $ 25                  
Rincon Mining Pty Limited                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Purchase of property, plant and equipment, classified as investing activities         $ 825                
Asset purchase of capitalised exploration and evaluation         $ 822                
Agua De La Falda | Meridian Minera Limitada                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Percentage of voting equity interests acquired               57.70%       57.70%  
Consideration transferred, acquisition-date fair value                       $ 45  
Nuevo Cobre | Corporacion Nacional Del Cobre De Chile                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Percentage of voting equity interests acquired                       42.30%  
Attributable to non-controlling interests                       $ 33  
Turquoise Hill                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Percentage of voting equity interests acquired                         49.00%
Consideration transferred, acquisition-date fair value                         $ 3,200
Payments from changes in ownership interests in subsidiaries that do not result in loss of control                 2,961        
Transaction costs               $ 33 33        
Expected transaction costs                 41        
Turquoise Hill | Dissenting Shareholders                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Payments from changes in ownership interests in subsidiaries that do not result in loss of control                 $ 211        
Initial consideration paid (in Canadian dollars per share) | $ / shares                   $ 34.4      
Turquoise Hill | Other Shareholders                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Initial consideration paid (in Canadian dollars per share) | $ / shares                   $ 43      
Matalco Joint Venture | Giampaolo Group                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Acquisition of joint venture $ 738                        
Matalco Canada Inc. | Giampaolo Group                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Proportion of ownership interest in joint venture, acquired 50.00%                        
Number of facilities | facility 1                        
Matalco USA | Giampaolo Group                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Proportion of ownership interest in joint venture, acquired 50.00%                        
Number of facilities | facility 6                        
Diavik                          
Disclosure Of Acquisitions And Disposals [Line Items]                          
Proportion of ownership interest in joint venture, acquired           40.00%              
Proportion of ownership interest in joint venture (%)             60.00%            
Proportion receivable or contingent asset percent           40.00%              
[1] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.
[2] On 16 December 2022, we acquired the remaining 49% share of Turquoise Hill Resources for expected consideration of US$3.2 billion inclusive of transaction fees. At 31 December 2022,
US$2,961 million had been paid, including US$33 million of transaction costs. In 2023, further transaction costs of US$33 million were paid, the balance to dissenting shareholders remains
unpaid.