Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 453	$ 397
Operating cash flows from finance leases	78	55
Financing cash flows from finance leases	79	47
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	983	496
Finance leases	$ 1,489	$ 419