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Exploration and evaluation expenditure (Details) - USD ($)
$ in Millions
 12 Months Ended
Aug. 28, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Exploration And Evaluation Expenditures [Line Items]        
Proceeds from disposal of exploration and evaluation assets   $ 0 $ 88 $ 1
Expenditure in the year (inclusive of net cash proceeds of nil (2023: US$88 million; 2022: US$1 million) on disposal of undeveloped projects)   (1,337) (1,684) (1,097)
Non-cash movements and non-cash proceeds on disposal of undeveloped projects   (15) (17) (6)
Amount capitalised during the year   416 471 207
Exploration and evaluation expenditure (net of profit from disposal of interests in undeveloped projects) per income statement   (936) (1,230) (896)
Exploration and evaluation expenditures   (935) (1,384) (897)
(Loss)/profit from disposal of interests in undeveloped projects   $ (1) $ 154 $ 1
La Granja | First Quantum        
Exploration And Evaluation Expenditures [Line Items]        
Proceeds from disposal of exploration and evaluation assets $ 88      
Proportion of interest sold 55.00%      
Pre-tax gain $ 154