Components of Lease Expense (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating lease cost	$ 465	$ 410
Finance lease cost:
Amortization of right-of-use assets	125	78
Interest on lease liabilities	78	55
Total finance lease cost	$ 203	$ 133