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Exploration and evaluation expenditure (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Exploration And Evaluation Expenditures [Line Items]      
Proceeds from disposal of exploration and evaluation assets $ 88 $ 1 $ 7
Expenditure in the year (inclusive of net cash proceeds of US$88 million (2022: US$1 million; 2021: US$7 million) on disposal of undeveloped projects)(a) (1,684) (1,097) (852)
Non-cash movements and non-cash proceeds on disposal of undeveloped projects (17) (6) 23
Amount capitalised during the year 471 207 110
Expense arising from exploration for and evaluation of mineral resources (1,230) (896) [1] (719) [1]
Exploration and evaluation expenditures (1,384) (897) (726)
Profit from disposal of interests in undeveloped projects(a) $ 154 $ 1 $ 7
La Granja      
Exploration And Evaluation Expenditures [Line Items]      
Proportion of interest sold 55.00%    
Pre-tax gain $ 154    
[1] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.