Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense	$ 43	$ (10)	$ 153	$ 21
Income before income tax benefit (loss)	$ 139	$ (1,046)	557	(1,123)
Gross income tax paid			131	93
Income tax refunds			$ 11	$ 5