Investments - Schedule of Earnings of Equity Affiliates (Detail) - USD ($) $ in Millions		3 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates		$ 8	$ 25
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	[1]	9	25
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates		$ (1)	$ 0

[1] In accordance with ASC 350, the Company amortized $12 million and $16 million, respectively, related to excess cost over the Company's proportionate share of its investment's underlying net assets allocated to finite-lived intangible assets during the three months ended September 30, 2015 and 2014. Such amortization is reflected in Equity earnings of affiliates in the Statements of Operations.