Investments - Schedule of Losses of Equity Affiliates (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Schedule of Equity Method Investments [Line Items]
Equity losses of affiliates	$ (17)	$ (1,006)	$ (295)
Foxtel [Member]
Schedule of Equity Method Investments [Line Items]
Equity losses of affiliates	0	(974)	(265)
Other Equity Affiliates, Net [Member]
Schedule of Equity Method Investments [Line Items]
Equity losses of affiliates	$ (17)	$ (32)	$ (30)