Income Taxes - Schedule of (Loss) Income from Continuing Operations Before Income Tax Expense (Benefit) Attributable to Jurisdictions (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Schedule Of Components Of Income Tax Expense Benefit [Line Items]
U.S.	$ 99	$ (55)	$ 84
Foreign	255	(1,034)	(699)
Income (loss) before income tax expense	$ 354	$ (1,089)	$ (615)