Components of Lease Expense (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Leases [Line Items]
Operating lease cost	$ 388	$ 260
Finance lease cost
Amortization of right-of-use assets	48	15
Interest on lease liabilities	30	12
Total finance lease cost	$ 78	$ 27