Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Income tax expense	$ 32	$ 29	$ 128	$ 199
Income before income tax expense	$ 91	$ 133	347	832
Gross income tax paid			114	132
Income tax refunds			$ 13	$ 3
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Tax Credit Carryforward [Line Items]
Ownership percentage		17.50%		17.50%