Investments - Schedule of Losses of Equity Affiliates (Parenthetical) (Detail) $ in Millions	3 Months Ended
Sep. 30, 2017 USD ($)
Equity Losses of Affiliates [Member] \| Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Amortization of excess basis allocated to finite-lived intangible assets	$ 17

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.

No definition available.

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