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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, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets $ 56 $ 56  
Deferred tax liabilities 4,299 3,063  
Charged/(credited) to the income statement 387 125 $ 1,325
Depreciation [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (629) (526)  
Deferred tax liabilities 6,259 4,844  
Charged/(credited) to the income statement 452 554 488
Exploration expenditure [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 11 9  
Deferred tax liabilities (1)    
Charged/(credited) to the income statement (2) 13 347
Employee benefits [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 27 21  
Deferred tax liabilities (425) (322)  
Charged/(credited) to the income statement (94) 20 (68)
Closure and rehabilitations [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 143 104  
Deferred tax liabilities (1,753) (1,448)  
Charged/(credited) to the income statement (296) 24 (515)
Resource rent tax [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Charged/(credited) to the income statement   (129) (309)
Other provisions [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 64 70  
Deferred tax liabilities (210) (192)  
Charged/(credited) to the income statement 4 49 77
Deferred income [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 14 51  
Deferred tax liabilities   (1)  
Charged/(credited) to the income statement 37 (31) (31)
Deferred charges [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (82) (57)  
Deferred tax liabilities 644 584  
Charged/(credited) to the income statement 85 7 68
Investments, including foreign tax credits [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 225 139  
Deferred tax liabilities 370 365  
Charged/(credited) to the income statement (54) (298) 414
Foreign exchange gains and losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (14) (13)  
Deferred tax liabilities 190 154  
Charged/(credited) to the income statement 42 33 63
Tax losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 276 225  
Deferred tax liabilities (214) (307)  
Charged/(credited) to the income statement 37 28 678
Lease liability [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 18 17  
Deferred tax liabilities (767) (594)  
Charged/(credited) to the income statement (83) (10) 67
Other [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 3 16  
Deferred tax liabilities 206 (20)  
Charged/(credited) to the income statement $ 259 $ (135) $ 46