Investments - Schedule of Investments (Parenthetical) (Detail) AUD in Millions, $ in Millions	1 Months Ended						9 Months Ended		12 Months Ended
	Feb. 29, 2016 USD ($)	Feb. 29, 2016 AUD	Jun. 30, 2015 USD ($)		Nov. 30, 2014 USD ($)	Jul. 31, 2014 USD ($)	Mar. 31, 2016 USD ($)		Jun. 30, 2015 USD ($)		Mar. 31, 2016 AUD	Jan. 31, 2016	Dec. 31, 2014
APN [Member]
Schedule of Investments [Line Items]
Ownership interest percentage on investment			14.99%						14.99%
Purchase price of ownership interest									$ 112
SEEK Asia Limited [Member]
Schedule of Investments [Line Items]
Ownership interest percentage on investment			12.90%		12.10%				12.90%
Additional ownership interest percentage on investment			0.80%						0.80%
Other investments, amount					$ 60
Purchase price of additional ownership interest			$ 7
iProperty Group Limited [Member] | REA Group [Member]
Schedule of Investments [Line Items]
Ownership interest percentage on investment			19.90%			17.22%			19.90%
Additional ownership interest percentage on investment													2.20%
Business acquisition, ownership percentage	86.90%	86.90%										22.70%
Business acquisition, cost of acquired entity	$ 340	AUD 482
Other Equity Method Investments [Member] | iProperty Group Limited [Member] | REA Group [Member]
Schedule of Investments [Line Items]
Equity method investment, cash consideration paid						$ 100
Foxtel [Member]
Schedule of Investments [Line Items]
Loan receivable from Foxtel			$ 345	[1]			$ 339	[1]	$ 345	[1]	AUD 451
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 pro rata capital contributions made by Foxtel shareholders 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 ($339 million and $345 million as of March 31, 2016 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.