Investments - Schedule of Earnings of Equity Affiliates (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	$ 16		$ 17		$ 41		$ 30
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	15	[1]	17	[1]	40	[1]	30	[1]
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	$ 1		$ 0		$ 1		$ 0

[1] In accordance with ASC 350, the Company amortized $14 million and $30 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 the three and six months ended December 31, 2014, respectively, and $15 million and $31 million in the corresponding periods of fiscal 2014, respectively. Such amortization is reflected in Equity earnings of affiliates in the Statements of Operations.