Investments - Schedule of Investments (Parenthetical) (Detail) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Aug. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)		Sep. 30, 2013 USD ($)		Sep. 30, 2014 Foxtel Shareholder Notes [Member]	Sep. 30, 2014 Loan Receivable from Foxtel [Member] USD ($)		Sep. 30, 2014 Loan Receivable from Foxtel [Member] AUD	Jun. 30, 2014 Loan Receivable from Foxtel [Member] USD ($)		Feb. 28, 2014 SEEK Asia Limited [Member] USD ($)	Jul. 31, 2014 iProperty Group Limited [Member] USD ($)	Oct. 31, 2014 Scenario, Forecast [Member] iProperty Group Limited [Member]	Oct. 31, 2014 Subsequent Event [Member] iProperty Group Limited [Member]
Schedule of Investments [Line Items]
Other investments							$ 396	[1]	451	$ 425	[1]
Ability to repay subordinated note at earliest						Jul. 01, 2022
Maturity date of subordinated note						Jul. 15, 2027
Percentage of interest payable on subordinated note						12.00%
Cash consideration on sale of marketable securities	104
Gain on sale of marketable securities		29	[2]	0	[2]
Ownership interest percentage on investment												12.10%	17.22%
Cost method investment,cash consideration paid													100
Additional ownership interest percentage on investment														2.20%
Cost method investment, future ownership percentage															19.90%
Other investments, amount												$ 60

[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 ($396 million and $425 million as of September 30, 2014 and June 30, 2014, respectively). The subordinated shareholder note can be repaid beginning in July 2022 provided that Foxtel's senior debt has been repaid. The subordinated shareholder note has 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.

[2] See Note 4-Investments