Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 397	$ 369
Operating cash flows from finance leases	55	30
Financing cash flows from finance leases	47	25
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	496	391
Finance leases	$ 419	$ 728