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Segmental information - Summary of performance of operating segments (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Disclosure of operating segments [line items]    
Consolidated sales revenue $ 26,873 $ 26,802
Underlying EBITDA 11,547 12,093
Proceeds from disposal of property, plant and equipment 7 17
Purchases of property, plant and equipment and intangible assets [1] 4,734 4,018
Exploration and evaluation expenditures 334 487
Total for all subsidiaries    
Disclosure of operating segments [line items]    
Share of sales revenue of equity accounted units $ 128 121
Iron Ore    
Disclosure of operating segments [line items]    
Percent of exploration and evaluation charge 19.00%  
Aluminium    
Disclosure of operating segments [line items]    
Percent of exploration and evaluation charge 2.00%  
Copper    
Disclosure of operating segments [line items]    
Percent of exploration and evaluation charge 36.00%  
Minerals    
Disclosure of operating segments [line items]    
Percent of exploration and evaluation charge 10.00%  
Other operations    
Disclosure of operating segments [line items]    
Consolidated sales revenue $ 157 49
Underlying EBITDA 16 55
Capital expenditure $ 5 12
Percent of exploration and evaluation charge 33.00%  
Simandou iron ore project    
Disclosure of operating segments [line items]    
Consolidated sales revenue $ 0 0
Underlying EBITDA (21) (7)
Capital expenditure 822 742
Share of equity accounted units    
Disclosure of operating segments [line items]    
Share of equity accounted units (2,528) (1,978)
Central pension costs, share-based payments, insurance and derivatives    
Disclosure of operating segments [line items]    
Underlying EBITDA (17) (158)
Restructuring, project and one-off costs    
Disclosure of operating segments [line items]    
Underlying EBITDA (320) (111)
Central costs    
Disclosure of operating segments [line items]    
Underlying EBITDA (427) (494)
Central exploration and evaluation expenditures    
Disclosure of operating segments [line items]    
Underlying EBITDA (110) (114)
Other items    
Disclosure of operating segments [line items]    
Capital expenditure 40 43
Gross product sales    
Disclosure of operating segments [line items]    
Share of sales revenue of equity accounted units 2,656 2,099
Operating segments | Reportable segments    
Disclosure of operating segments [line items]    
Consolidated sales revenue 29,366 28,838
Underlying EBITDA 12,423 12,912
Capital expenditure 3,860 3,204
Operating segments | Iron Ore    
Disclosure of operating segments [line items]    
Consolidated sales revenue 12,518 15,206
Underlying EBITDA 6,669 8,807
Capital expenditure 1,447 1,258
Operating segments | Aluminium    
Disclosure of operating segments [line items]    
Consolidated sales revenue 7,753 6,486
Underlying EBITDA 2,363 1,577
Capital expenditure 756 705
Operating segments | Copper    
Disclosure of operating segments [line items]    
Consolidated sales revenue 6,208 4,408
Underlying EBITDA 3,105 1,841
Capital expenditure 831 970
Operating segments | Minerals    
Disclosure of operating segments [line items]    
Consolidated sales revenue 2,887 2,738
Underlying EBITDA 286 687
Capital expenditure 826 271
Inter-segment transactions    
Disclosure of operating segments [line items]    
Consolidated sales revenue (122) (107)
Underlying EBITDA $ 3 $ 10
[1] In 2025, our net cash outflow in relation to the Simandou iron ore project was US$486 million (30 June 2024:US$331 million). This includes cash outflows of US$822 million (30 June 2024: US$742 million) for purchases of property, plant and equipment, and US$331 million (30 June 2024: nil) as net funding of equity accounted units for the funding of shared infrastructure in the WCS Rail and Port entities. We received related cash inflows of US$667 million (30 June 2024: US$411 million) from Chalco Iron Ore Holdings Ltd (CIOH) for cash calls by SimFer Jersey Limited.