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Segmental information - Summary of performance of operating segments (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Disclosure of operating segments [line items]    
Consolidated sales revenue $ 26,667 $ 29,775 [1]
Underlying EBITDA 11,728 15,597
Proceeds from disposal of property, plant and equipment 8 1
Purchase of property, plant and equipment and intangible assets 3,001 3,146
Subsidiaries    
Disclosure of operating segments [line items]    
Share of sales revenue of equity accounted units 21 27
Other Operations    
Disclosure of operating segments [line items]    
Consolidated sales revenue 97 107
Underlying EBITDA (395) (125)
Capital expenditure 32 9
Share of equity accounted units    
Disclosure of operating segments [line items]    
Share of equity accounted units (1,515) (1,539)
Central pension costs, share-based payments, insurance and derivatives    
Disclosure of operating segments [line items]    
Underlying EBITDA 167 265
Restructuring, project and one-off costs    
Disclosure of operating segments [line items]    
Underlying EBITDA (84) (86)
Central costs    
Disclosure of operating segments [line items]    
Underlying EBITDA (512) (397)
Central exploration and evaluation expenditures    
Disclosure of operating segments [line items]    
Underlying EBITDA (134) (113)
Other items    
Disclosure of operating segments [line items]    
Capital expenditure 49 41
Gross product sales    
Disclosure of operating segments [line items]    
Share of sales revenue of equity accounted units 1,536 1,566
Operating segments | Reportable segments    
Disclosure of operating segments [line items]    
Consolidated sales revenue 28,239 31,356
Underlying EBITDA 12,703 16,054
Capital expenditure 2,912 3,095
Operating segments | Iron Ore    
Disclosure of operating segments [line items]    
Consolidated sales revenue 15,600 16,610
Underlying EBITDA 9,792 10,395
Capital expenditure 1,094 1,472
Operating segments | Aluminium    
Disclosure of operating segments [line items]    
Consolidated sales revenue 6,263 7,796
Underlying EBITDA 1,140 2,866
Capital expenditure 597 625
Operating segments | Copper    
Disclosure of operating segments [line items]    
Consolidated sales revenue 3,487 3,547
Underlying EBITDA 1,082 1,534
Capital expenditure 917 730
Operating segments | Minerals    
Disclosure of operating segments [line items]    
Consolidated sales revenue 2,889 3,403
Underlying EBITDA 689 1,259
Capital expenditure 304 268
Inter-segment transactions    
Disclosure of operating segments [line items]    
Consolidated sales revenue (154) (149)
Underlying EBITDA $ (17) $ (1)
[1] Comparative information has been restated to reflect the adoption of narrow scope amendments to IAS12 'Income Taxes', refer to note 2 for details.