Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Income tax expense, net	$ 52	$ 55	$ 31	$ 105
Income before income tax benefit (loss)	$ 155	$ 174	(77)	352
Gross income tax paid			69	75
Income tax refunds			$ 3	$ 10