v3.25.2
Deferred Tax Balances - Summary of Movement in Net Deferred Tax Position (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Income tax (charge)/credit recorded in the income statement $ (177) $ 988 $ (387)
Western Australia Nickel [Member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Income tax (charge)/credit recorded in the income statement   $ 1,125  
Chilean tax reform [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred tax position remeasured     $ (283)