Investments - Schedule of Available-for-Sale Investments (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Jun. 30, 2015
Investments Schedule [Abstract]
Cost basis of available-for-sale investments		$ 164	$ 164
Accumulated gross unrealized gain		48	46
Accumulated gross unrealized loss		(53)	(25)
Fair value of available-for-sale investments	[1]	159	185
Net deferred tax liability		$ (3)	$ (11)

[1] During fiscal 2015, the Company purchased a 14.99% interest in APN News and Media Limited ("APN") for approximately $112 million. APN operates a portfolio of Australian and New Zealand radio and outdoor media assets and small regional print interests.