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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Parenthetical) (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Jun. 30, 2022
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 $ 5,709 $ 5,777
Tax credits, which are not recognised as deferred tax assets 2,863 2,685
Gross amount of income tax losses not recognised 6,829 5,738
Gross amount of tax losses not recognized 20,699 19,911
Tax effect of total losses not recognised 5,709 5,777
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 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 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 47 43
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 549 248
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 458 556
Gross amount of income tax losses not recognised 1,317 1,290
Unlimited [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Gross amount of income tax losses not recognised 4,889 4,157
Gross amount of capital tax losses not recognised 13,870 14,173
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 $ 2,405 $ 2,129