Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized losses, net of tax	$ (4)	$ (11)
Net change related to other comprehensive income (loss), tax	6	1
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized losses, net of tax	(75)	(510)
Net change related to other comprehensive income (loss), tax	(69)	(503)
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net change related to other comprehensive income (loss), tax	$ 0	$ 0