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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Jun. 30, 2022
Unrecognised deferred tax assets    
Tax losses and tax credits $ 8,572 $ 8,462
Total unrecognised deferred tax assets 15,432 14,617
Unrecognised deferred tax liabilities    
Investments in subsidiaries 2,179 2,099
Total unrecognised deferred tax liabilities 2,179 2,099
Investments in subsidiaries [member]    
Unrecognised deferred tax assets    
Temporary differences 1,661 1,597
Mineral rights [member]    
Unrecognised deferred tax assets    
Temporary differences 3,287 2,781
Other deductible temporary differences [member]    
Unrecognised deferred tax assets    
Temporary differences $ 1,912 $ 1,777