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Income Tax Expense - Summary of Income Tax Recognised in Other Comprehensive Income (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Cash flow hedges:      
Gains/(losses) taken to equity $ (29) $ 274 $ (259)
(Gains)/losses transferred to the income statement 45 (264) 252
Others (11)   (1)
Income tax credit/(charge) relating to items that may be reclassified subsequently to the income statement 5 10 (8)
Items that will not be reclassified to the income statement:      
Re-measurement gains/(losses) on pension and medical schemes 7 (9) (21)
Others     1
Income tax credit/(charge) relating to items that will not be reclassified to the income statement 7 (9) (20)
Total income tax credit/(charge) relating to components of other comprehensive income $ 12 $ 1 $ (28)