Investments - Schedule of Earnings of Equity Affiliates (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	$ 7		$ 23		$ 48		$ 53
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	8	[1]	23	[1]	48	[1]	53	[1]
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings of affiliates	$ (1)		$ 0		$ 0		$ 0

[1] In accordance with ASC 350, the Company amortized $14 million and $44 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 nine months ended March 31, 2015, respectively, and $15 million and $46 million in the corresponding periods of fiscal 2014, respectively. Such amortization is reflected in Equity earnings of affiliates in the Statements of Operations.