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Deferred Tax Balances - Summary of Composition of Net Deferred Tax Assets and Liabilities and Deferred Tax Expense Charged/(Credited) to Income Statement (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets $ 67 $ 56  
Deferred tax liabilities 3,332 4,299  
Charged/(credited) to the income statement (988) 387 $ 125
Depreciation [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (756) (629)  
Deferred tax liabilities 5,221 6,259  
Charged/(credited) to the income statement (894) 452 554
Exploration expenditure [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 14 11  
Deferred tax liabilities   (1)  
Charged/(credited) to the income statement (2) (2) 13
Employee benefits [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 23 27  
Deferred tax liabilities (407) (425)  
Charged/(credited) to the income statement 6 (94) 20
Closure and rehabilitations [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 155 143  
Deferred tax liabilities (1,770) (1,753)  
Charged/(credited) to the income statement (29) (296) 24
Resource rent tax [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Charged/(credited) to the income statement     (129)
Other provisions [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 55 64  
Deferred tax liabilities (196) (210)  
Charged/(credited) to the income statement 23 4 49
Deferred income [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets   14  
Deferred tax liabilities (23)    
Charged/(credited) to the income statement (9) 37 (31)
Deferred charges [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (55) (82)  
Deferred tax liabilities 522 644  
Charged/(credited) to the income statement (148) 85 7
Investments, including foreign tax credits [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 274 225  
Deferred tax liabilities 411 370  
Charged/(credited) to the income statement (6) (54) (298)
Foreign exchange gains and losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (9) (14)  
Deferred tax liabilities 80 190  
Charged/(credited) to the income statement (115) 42 33
Tax losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 364 276  
Deferred tax liabilities (84) (214)  
Charged/(credited) to the income statement 40 37 28
Lease liability [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 9 18  
Deferred tax liabilities (730) (767)  
Charged/(credited) to the income statement 45 (83) (10)
Other [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (7) 3  
Deferred tax liabilities 308 206  
Charged/(credited) to the income statement $ 101 $ 259 $ (135)