Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax (expense) benefit	$ (25)	$ 21
Income before income tax benefit (loss)	72	(232)
Gross income tax paid	23	27
Income tax refunds	$ 8	$ 3