Investments - Schedule of Equity Losses of Affiliates (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Total Equity (losses) earnings of affiliates		$ (974)	$ (23)	$ (1,002)	$ (276)
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity (losses) earnings of affiliates	[1]	(970)	(16)	(974)	(260)
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity (losses) earnings of affiliates	[2]	$ (4)	$ (7)	$ (28)	$ (16)

[1] During the three and nine months ended March 31, 2018, the Company recognized a $957 million non-cash write-down of the carrying value of its investment in Foxtel. The write-down is reflected in Equity losses of affiliates in the Statements of Operations for the three and nine months ended March 31, 2018. Refer to the discussion above for further details.

[2] During the nine months ended March 31, 2018, the Company recognized $13 million in non-cash write-downs of certain equity method investments' carrying values. The write-downs are reflected in Equity losses of affiliates in the Statements of Operations for the nine months ended March 31, 2018.