Components of Lease Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 2,127	$ 2,043	$ 1,707
Finance lease cost:
Amortization of right-of-use assets	921	611	370
Interest on lease liabilities	386	336	247
Total finance lease cost	$ 1,307	$ 947	$ 617