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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Jun. 30, 2024
Jun. 30, 2023
Unrecognised deferred tax assets    
Tax losses and tax credits $ 9,126 $ 8,572
Total unrecognised deferred tax assets 15,853 15,432
Unrecognised deferred tax liabilities    
Investments in subsidiaries 2,307 2,179
Total unrecognised deferred tax liabilities 2,307 2,179
Investments in subsidiaries [member]    
Unrecognised deferred tax assets    
Temporary differences 1,533 1,661
Mineral rights [member]    
Unrecognised deferred tax assets    
Temporary differences 3,216 3,287
Other deductible temporary differences [member]    
Unrecognised deferred tax assets    
Temporary differences $ 1,978 $ 1,912