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Additional Financial Information - Interest Expense, Net (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense	$ (119)	$ (89)	$ (210)	$ (176)
Interest income	47	29	96	48
Total interest expense, net	$ (72)	$ (60)	$ (114)	$ (128)

Amount of the cost of borrowed funds accounted for as interest expense.

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.