Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Tax Contingency [Line Items]
Income tax expense (benefit), net	$ (10)	$ 7	$ 21	$ 112
Income before income tax benefit (loss)	$ (1,046)	$ 30	(1,123)	382
Gross income tax paid			93	107
Income tax refunds			$ 5	$ 17