Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 85	$ 52	$ 110	$ 31
Income before income tax benefit (loss)	$ 346	$ 155	418	(77)
Gross income tax paid			98	69
Income tax refunds			$ 9	$ 3