v3.26.1
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, 2026
Jun. 30, 2025
Jun. 30, 2024
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets $ 114 $ 78  
Deferred tax liabilities 3,101 3,506  
(Credited)/charged to the income statement [1] (320) 177 $ (988)
Depreciation [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (507) (876)  
Deferred tax liabilities 5,296 5,284  
(Credited)/charged to the income statement (322) 211 (896)
Employee benefits [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 41 35  
Deferred tax liabilities (541) (477)  
(Credited)/charged to the income statement (65) (78) 6
Closure and rehabilitations [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 221 195  
Deferred tax liabilities (2,111) (1,826)  
(Credited)/charged to the income statement (311) (96) (29)
Other provisions [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 39 47  
Deferred tax liabilities (180) (202)  
(Credited)/charged to the income statement 29 2 23
Deferred income [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax liabilities (16) (9)  
(Credited)/charged to the income statement (8) 14 (9)
Deferred charges [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (38) (31)  
Deferred tax liabilities 588 551  
(Credited)/charged to the income statement 44 5 (148)
Investments, including foreign tax credits [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 281 281  
Deferred tax liabilities 660 516  
(Credited)/charged to the income statement 143 96 (6)
Foreign exchange gains and losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (21) (14)  
Deferred tax liabilities 32 85  
(Credited)/charged to the income statement (45) 9 (115)
Tax losses [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 88 491  
Deferred tax liabilities (32) (38)  
(Credited)/charged to the income statement 409 (80) 40
Lease liability [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets 35 23  
Deferred tax liabilities (749) (735)  
(Credited)/charged to the income statement (25) (19) 45
Other [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax assets (25) (73)  
Deferred tax liabilities 154 357  
(Credited)/charged to the income statement $ (169) $ 113 $ 101
[1] Includes US$1,125 million income tax credit in the year ended 30 June 2024 as a result of an impairment of Western Australia Nickel Assets.