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Components of Lease Expense (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Leases [Abstract]        
Operating lease cost $ 817 $ 684 $ 1,591 $ 1,346
Finance lease cost:        
Amortization of right-of-use assets 408 457 788 646
Interest on lease liabilities 168 119 317 232
Total finance lease cost $ 576 $ 576 $ 1,105 $ 878