Investments - Schedule of Available-for-Sale Investments (Detail) - USD ($) $ in Millions		Jun. 30, 2016	Jun. 30, 2015
Investments Schedule [Abstract]
Cost basis of available-for-sale investments		$ 155	$ 164
Accumulated gross unrealized gain		34	46
Accumulated gross unrealized loss		0	(25)
Fair value of available-for-sale investments	[1]	189	185
Net deferred tax liability		$ 13	$ 11

[1] Available-for-sale securities primarily include the Company's investments in The Rubicon Project, Inc. and APN. During fiscal 2015, the Company purchased a 14.99% interest in APN for approximately $112 million. During fiscal 2016, the Company participated in an entitlement offer to maintain its 14.99% interest for $20 million. APN operates a portfolio of Australian radio and outdoor media assets.