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Close-down and restoration provisions - Summary of provisions, including post-retirement benefits (Detail) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of other provisions [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 1,558 1,658 $ 2,492
Balance sheet analysis:        
Current 361 361 353  
Non-current 1,197 1,197 1,305  
Total 1,558 1,558 1,658 2,492
Change in closure estimates (non-operating and fully impaired sites) 1,272 1,272 180 1,096
Close down and restoration/ environmental        
Disclosure of other provisions [Line Items]        
Provisions, beginning balance   15,759 14,542  
Adjustment on currency translation   241 (699)  
Adjustments to mining properties/right-of-use assets:        
– increases to existing and new provisions   629 520  
– change in discount rate   (921) 0  
Charged/(credited) to profit:        
– increases to existing and new provisions   1,654 541  
– change in discount rate   (168) 0  
– unused amounts reversed   (195) (72)  
– exchange (gains)/losses on provisions   (16) 17  
– amortisation of discount   955 1,517  
Utilised in year   (777) (609)  
Transfers and other movements   (11) 2  
Provisions, ending balance 17,150 17,150 15,759 14,542
Balance sheet analysis:        
Current 1,523 1,523 1,142  
Non-current 15,627 15,627 14,617  
Total 17,150 17,150 15,759 $ 14,542
Change in closure estimates (non-operating and fully impaired sites)   900    
Close down and restoration/ environmental | Diavik Diamond Mines (2012) Inc.        
Balance sheet analysis:        
Provisions relating to insurance recoveries and other financial assets held $ 366 $ 366 $ 351