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Closure and Rehabilitation Provisions - Summary of Closure and Rehabilitation Provisions (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Disclosure of other provisions [line items]    
Current $ 3,965 $ 3,696
Non-current 10,478 13,799
Closure and rehabilitation provisions [member]    
Disclosure of other provisions [line items]    
At the beginning of the financial year 11,910 8,810
Increases to existing and new provisions 174 564
Exchange translation (58) 76
Released during the year (42) (157)
Amortisation of discounting impacting net finance costs 554 380
Acquisition of subsidiaries and operations   179
Divestment and demerger of subsidiaries and operations (4,477) (81)
Utilisation (316) (321)
Exchange variations impacting foreign currency translation reserve (3) 3
Other movements 62  
At the end of the financial year 8,689 11,910
Current 475 591
Non-current 8,214 11,319
Closure and rehabilitation provisions [member] | Operating sites [member]    
Disclosure of other provisions [line items]    
At the beginning of the financial year 9,279  
Change in estimate 1,579 1,974
Exchange translation (694) 483
At the end of the financial year 6,198 9,279
Closure and rehabilitation provisions [member] | Closed sites [member]    
Disclosure of other provisions [line items]    
At the beginning of the financial year 2,631  
At the end of the financial year $ 2,491 $ 2,631