Investments - Schedule of Equity Losses of Affiliates (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Foxtel [Member] \| Equity (Losses) Earnings of Affiliates [Member]
Schedule of Equity Method Investments [Line Items]
Amortization of excess basis allocated to finite-lived intangible assets	$ 17	$ 19

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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