Investments - Schedule of Earnings of Equity Affiliates (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	$ 25		$ 13
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	25	[1]	13	[1]
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	$ 0		$ 0

[1] In accordance with ASC 350, the Company amortized $16 million related to excess cost over the Company's proportionate share of its investment's underlying net assets allocated to finite-lived intangible assets during both the three months ended September 30, 2014 and 2013. Such amortization is reflected in Equity earnings of affiliates in the Statements of Operations.