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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, 2021
Jun. 30, 2020
Jun. 30, 2019
Cash flow hedges:      
Gains/(losses) taken to equity $ (259) $ 94 $ 98
(Gains)/losses transferred to the income statement 252 (89) (90)
Others (1)    
Income tax credit/(charge) relating to items that may be reclassified subsequently to the income statement (8) 5 8
Items that will not be reclassified to the income statement:      
Remeasurement gains/(losses) on pension and medical schemes (21) 25 7
Others 1 1 12
Income tax (charge)/credit relating to items that will not be reclassified to the income statement (20) 26 19
Total income tax (charge)/credit relating to components of other comprehensive income $ (28) $ 31 $ 27