Investments - Schedule of Investments (Parenthetical) (Detail) AUD in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2015 USD ($)		Sep. 30, 2015 AUD	Jun. 30, 2015 USD ($)	[1]	Dec. 31, 2014	Jul. 31, 2014 USD ($)
iProperty Group Limited [Member]
Schedule of Investments [Line Items]
Ownership interest percentage on investment	22.70%		22.70%				17.22%
Equity method investment, cash consideration paid							$ 100
Additional ownership interest percentage on investment						2.20%
Loan Receivable from Foxtel [Member]
Schedule of Investments [Line Items]
Other investments	$ 317	[1]	AUD 451	$ 345
Foxtel Shareholder Notes [Member]
Schedule of Investments [Line Items]
Earliest date subordinated note can be repaid	Jul. 01, 2022
Maturity date of subordinated note	Jul. 15, 2027
Percentage of interest payable on subordinated note	12.00%		12.00%

[1] In May 2012, Foxtel purchased Austar United Communications Ltd. The transaction was funded by Foxtel bank debt and Foxtel's shareholders made pro rata capital contributions in the form of subordinated shareholder notes based on their respective ownership interests. The Company's share of the subordinated shareholder notes was approximately A$451 million ($317 million and $345 million as of September 30, 2015 and June 30, 2015, respectively). The subordinated shareholder notes can be repaid beginning in July 2022 provided that Foxtel's senior debt has been repaid. The subordinated shareholder notes have a maturity date of July 15, 2027, with interest of 12% payable on June 30 each year and at maturity. Upon maturity, the principal advanced will be repayable.