Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2020	Jul. 01, 2019	Jun. 30, 2017
Lessee, Lease, Description [Line Items]
Stockholders' equity	$ 10,311	$ 10,477	$ 8,389		$ 11,073
Operating lease right of use assets	0		1,061
Operating lease liabilities non current	0		$ 1,146
Short term lease term			12 months
Operating leases expense	195	183
Retained Earnings
Lessee, Lease, Description [Line Items]
Stockholders' equity	(1,979)	(2,163)	$ (3,241)		$ (648)
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right of use assets				$ 1,400
Operating lease liabilities,current				200
Operating lease liabilities non current				1,400
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Stockholders' equity	9	20
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Lessee, Lease, Description [Line Items]
Stockholders' equity	$ 6	$ 32
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-02 | Retained Earnings
Lessee, Lease, Description [Line Items]
Stockholders' equity				$ 9