Commitments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Capital Leases
Commitments [Line Items]
Additional purchase obligations for capital leases executed but not yet recorded	$ 3,200
Other Current Liabilities
Commitments [Line Items]
Current capital lease obligations	113	$ 25
Other Long-term Liabilities
Commitments [Line Items]
Long-term capital lease obligations	2,400	761
Buildings
Commitments [Line Items]
Rental expense for facilities operating leases	1,300	$ 1,000	$ 989
Building, Building Improvements and Leasehold Improvements
Commitments [Line Items]
Committed for construction of new buildings, building improvements and leasehold improvements	$ 1,100