Investments - Schedule of Investments (Parenthetical) (Detail) AUD in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)		Jun. 30, 2016 USD ($)		Sep. 30, 2016 AUD	Jun. 30, 2016 AUD	Jun. 22, 2016	Jun. 21, 2016
Foxtel [Member]
Schedule of Investments [Line Items]
Loan receivable from Foxtel	$ 346	[1]	$ 338	[1]	AUD 451	AUD 451
APN [Member]
Schedule of Investments [Line Items]
Ownership interest percentage on investment			14.99%			14.99%
Purchase price of ownership interest			$ 20
Foxtel Shareholder Notes [Member]
Schedule of Investments [Line Items]
Maturity date of subordinated note	Jul. 15, 2027
Foxtel Shareholder Notes [Member] | Foxtel [Member]
Schedule of Investments [Line Items]
Percentage of loan receivable							10.50%	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 ($346 million and $338 million as of September 30, 2016 and June 30, 2016, 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 payable on June 30 each year and at maturity. On June 22, 2016, Foxtel and Foxtel's shareholders agreed to modify the terms of the loan receivable to reduce the interest rate from 12% to 10.5%, to more closely align with current market rates. Upon maturity, the principal advanced will be repayable.