Investments - Schedule of Equity Losses of Affiliates (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Total Equity (losses) earnings of affiliates		$ (18)	$ (238)	$ (28)	$ (253)
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity (losses) earnings of affiliates	[1]	1	(233)	(4)	(244)
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Total Equity (losses) earnings of affiliates		$ (19)	$ (5)	$ (24)	$ (9)

[1] In accordance with ASC 350, "Intangibles-Goodwill and Other," the Company amortized $15 million and $32 million related to excess cost over the Company's proportionate share of its investment's underlying net assets allocated to finite-lived intangible assets during the three and six months ended December 31, 2017, respectively, and $18 million and $37 million in the corresponding periods of fiscal 2017. Such amortization is reflected in Equity losses of affiliates in the Statements of Operations.