Investments - Schedule of Investments (Parenthetical) (Detail) AUD in Millions, $ in Millions	1 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($)		Nov. 30, 2014 USD ($)	Jul. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)		Jun. 30, 2015 USD ($)		Dec. 31, 2015 AUD	Dec. 31, 2014
iProperty Group Limited [Member]
Schedule of Investments [Line Items]
Ownership interest percentage on investment				17.22%	22.70%				22.70%
Additional ownership interest percentage on investment										2.20%
Other Equity Method Investments [Member] | iProperty Group Limited [Member]
Schedule of Investments [Line Items]
Equity method investment, cash consideration paid				$ 100
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
Loan Receivable from Foxtel [Member]
Schedule of Investments [Line Items]
Other investments	$ 345	[1]			$ 329	[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 ($329 million and $345 million as of December 31, 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.