Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Property, Plant and Equipment [Line Items]
Assets recorded under capital leases	$ 2,700	$ 865
Accumulated depreciation associated with capital leases	161	57
Property and equipment acquired under capital leases	1,800	413
Depreciation expense	$ 6,100	$ 4,900	$ 4,100