Components of Lease Expense (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Leases [Abstract]
Operating lease cost	$ 410	$ 388
Finance lease cost:
Amortization of right-of-use assets	78	48
Interest on lease liabilities	55	30
Total finance lease cost	$ 133	$ 78