Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains (losses), net of tax	$ (5)	$ 1	$ 1	$ 3
Net change related to other comprehensive income (loss), tax	3	(3)	8	(11)
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains (losses), net of tax	(56)	194	221	(225)
Net change related to other comprehensive income (loss), tax	(53)	199	231	(212)
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change related to other comprehensive income (loss), tax	$ 0	$ 0	$ 0	$ 0