Investments - Additional Information (Detail) - Foxtel [Member] $ in Millions	3 Months Ended
Sep. 30, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
Decrease in revenues	$ 141
Percentage of decrease in revenues	19.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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