v3.26.1
Closure and Rehabilitation Provisions - Summary of Closure and Rehabilitation Provisions (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure of other provisions [line items]    
Current $ 4,768 $ 5,823
Non-current 15,336 13,498
Closure and rehabilitation provisions [member]    
Disclosure of other provisions [line items]    
At the beginning of the financial year 10,468 9,837
Amortisation of discounting impacting net finance costs 627 510
Divestment of subsidiaries and operations (15) 0
Utilisation (471) (468)
Other movements (2) 1
At the end of the financial year 11,598 10,468
Current 645 662
Non-current 10,953 9,806
Closure and rehabilitation provisions [member] | Operating sites [member]    
Disclosure of other provisions [line items]    
At the beginning of the financial year 6,908  
Change in estimate 628 548
Exchange translation 285 (61)
At the end of the financial year 7,953 6,908
Closure and rehabilitation provisions [member] | Closed and contaminated sites rehabilitation asset [member]    
Disclosure of other provisions [line items]    
At the beginning of the financial year 3,560  
Change in estimate 17 112
Exchange translation 61 (11)
At the end of the financial year $ 3,645 $ 3,560