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Other provisions (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
Disclosure of commitments and contingencies [Line Items]        
Provisions, beginning balance $ 1,658 $ 2,492    
Adjustment on currency translation 32 (99)    
Charged/(credited) to profit:        
– increases to existing and new provisions 78 231    
– unused amounts reversed (26) (12)    
Utilised in year (277) (254)    
Transfers and other movements (9) 1    
Provisions, ending balance 1,558 1,658   $ 2,492
Balance sheet analysis:        
Current 361 353 $ 353  
Non-current 1,197 1,305 1,305  
Total 1,558 1,658 $ 1,658 2,492
Payments from changes in ownership interests in subsidiaries that do not result in loss of control [1] 33 2,961   0
Turquoise Hill        
Balance sheet analysis:        
Payments from changes in ownership interests in subsidiaries that do not result in loss of control   2,961    
Dissenting Shareholders | Turquoise Hill        
Balance sheet analysis:        
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  
Other Shareholders | Turquoise Hill        
Balance sheet analysis:        
Initial consideration paid (in Canadian dollars per share) | $ / shares     $ 43  
Other        
Disclosure of commitments and contingencies [Line Items]        
Provisions, beginning balance 1,298 1,019    
Adjustment on currency translation 14 (43)    
Adjustments to mining properties/right-of-use assets:        
– decrease to existing and new provisions 0 4    
Charged/(credited) to profit:        
– increases to existing and new provisions 214 365    
– change in discount rate (18) 0    
– unused amounts reversed (31) (66)    
– exchange gain on provisions (1) 0    
– amortisation of discount 22 2    
Utilised in year (104) (176)    
Transfers and other movements (23) 193    
Provisions, ending balance 1,371 1,298   1,019
Balance sheet analysis:        
Current 637 554 $ 554  
Non-current 734 744 744  
Total $ 1,371 $ 1,298 $ 1,298 $ 1,019
[1] 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.