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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Parenthetical) (Detail) - USD ($)
$ in Millions
Jun. 30, 2024
Jun. 30, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Income and capital tax losses with a tax benefit, which are not recognised as deferred tax assets $ 5,589 $ 5,709
Tax credits, which are not recognised as deferred tax assets 3,537 2,863
Gross amount of income tax losses not recognised 7,356 6,829
Gross amount of tax losses not recognized 20,850 20,699
Tax effect of total losses not recognised 5,589 5,709
Due not later than one year [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Gross amount of income tax losses not recognised 28 22
Gross amount of capital tax losses not recognised 0  
Later than one year and not later than two years [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Gross amount of income tax losses not recognised 10 5
Later than two years and not later than five years [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Gross amount of income tax losses not recognised 43 47
Gross amount of capital tax losses not recognised 0  
Later than five years and not later than 10 years [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Gross amount of income tax losses not recognised 652 549
Later than 10 years and not later than 20 years [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax credits, which are not recognised as deferred tax assets 745 458
Gross amount of income tax losses not recognised 1,003 1,317
Unlimited [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Gross amount of income tax losses not recognised 5,620 4,889
Gross amount of capital tax losses not recognised 13,494 13,870
Not Later than 10 year[member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Tax credits, which are not recognised as deferred tax assets $ 2,792 $ 2,405