Investments - Additional Information (Detail) $ in Millions	6 Months Ended
Dec. 31, 2016 USD ($)
Foxtel [Member]
Investment [Line Items]
Increase (Decrease) in revenue	$ 35
Percentage of increase in revenues	3.00%
Presto Operations [Member]
Investment [Line Items]
Increase (Decrease) in revenue	$ 26
Ten Network Holdings [Member]
Investment [Line Items]
Increase (Decrease) in revenue	$ 22

Line items represent reporting 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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Sentence Column A

Name:	invest_InvestmentLineItems
Namespace Prefix:	invest_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration