Investments - Schedule of Available-for-Sale Investments (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013
Investments Schedule [Abstract]
Cost basis of available-for-sale investments	$ 113		$ 3
Accumulated gross unrealized gain	38		3
Accumulated gross unrealized loss	0		0
Fair value of available-for-sale investments	151	[1]	6	[1]
Net deferred tax liability	$ 14		$ 2

[1] In April 2014, The Rubicon Project ("Rubicon"), in which the Company originally owned approximately 5.6 million shares, completed an initial public offering of its common stock. The Company sold approximately 850 thousand shares as part of the public offering which resulted in a pre-tax gain on sale of $6 million and reduced the Company's ownership percentage to 13.7%. Prior to the public offering, the Company's investment in Rubicon was recorded in the Balance Sheets as a cost method investment. As a result of the offering, the Company's remaining investment in Rubicon was designated as an available-for-sale security as of April 2014, and carried at fair value. While the Rubicon investment is classified as an available-for-sale security, the Company is contractually restricted from selling these shares for at least six months from the date of the public offering.