Investments - Schedule of Earnings of Equity Affiliates (Parenthetical) (Detail) (Equity Earnings [Member], Foxtel [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Equity Earnings [Member] | Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Amortization of excess basis allocated to finite-lived intangible assets	$ 14	$ 15	$ 30	$ 31