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Dividends - Summary of Dividends Paid (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Disclosure of Dividends [abstract]      
Prior year final dividend, Per share $ 2 $ 0.55 $ 0.78
Interim dividend, Per share 1.5 1.01 0.65
Dividends paid during the period, Per share $ 3.5 $ 1.56 $ 1.43
Prior year final dividend, Total $ 10,119 $ 2,779 $ 3,946
Interim dividend, Total 7,601 5,115 3,288
Dividends paid during the period, Total $ 17,720 $ 7,894 $ 7,234