Investments - Schedule of Available-for-Sale Investments (Detail) - USD ($) $ in Millions		Mar. 31, 2016	Jun. 30, 2015
Investments Schedule [Abstract]
Cost basis of available-for-sale investments		$ 164	$ 164
Accumulated gross unrealized gain		56	46
Accumulated gross unrealized loss		(38)	(25)
Fair value of available-for-sale investments	[1]	182	185
Net deferred tax liability		$ (11)	$ (11)

[1] Available-for-sale securities primarily include the Company's investments in The Rubicon Project, Inc. and APN News and Media Limited ("APN"). During fiscal 2015, the Company purchased a 14.99% interest in APN for approximately $112 million. APN operates a portfolio of Australian and New Zealand radio and outdoor media assets and small regional print interests.