Investments - Additional Information (Detail) (Foxtel [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
Sep. 30, 2013	Sep. 30, 2012
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Increase in net income	$ 38
Net income	$ 58	$ 20

The amount of net income (loss) reported by an equity method investment of the entity.

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