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Shares of Common Stock Outstanding (Detail) - shares
shares in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Equity [Abstract]      
Balance, beginning of year 7,464 7,519 7,571
Issued 37 40 49
Repurchased (69) (95) (101)
Balance, end of year 7,432 7,464 7,519