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Dividends - Summary of Dividends Paid (Detail) - USD ($)
$ / shares in Units, $ in Millions
 6 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2022
Disclosure of Dividends [abstract]      
Prior year final dividend, Per share $ 1.75 $ 2 $ 2
Interim dividend, Per share     1.50
Dividends paid during the period, Per share $ 1.75 $ 2 $ 3.50
Prior year final dividend, Total $ 8,858 $ 10,119 $ 10,119
Interim dividend, Total     7,601
Dividends paid during the period, Total $ 8,858 $ 10,119 $ 17,720