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Dividends - Summary of Dividends Paid (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of Dividends [abstract]      
Prior year final dividend, Per share $ 0.80 $ 1.75 $ 2
Interim dividend, Per share 0.72 0.90 1.50
Dividends paid during the period, Per share $ 1.52 $ 2.65 $ 3.50
Prior year final dividend, Total $ 4,065 $ 8,858 $ 10,119
Interim dividend, Total 3,647 4,562 7,601
Dividends paid during the period, Total $ 7,712 $ 13,420 $ 17,720