Investments - Schedule of Summarized Financial Information (Parenthetical) (Detail) - Foxtel [Member] - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Depreciation and amortization	$ 215	$ 231	$ 319
Operating income before depreciation and amortization	$ 568	$ 604	$ 760

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.

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration