Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,522	$ 1,157	$ 936
Operating cash flows from finance leases	175	68	28
Financing cash flows from finance leases	144	46	6
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	1,571	1,270	1,062
Finance leases	$ 1,933	$ 1,773	$ 413