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Additional Financial Information - Interest Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense	$ (349)	$ (377)	$ (395)
Interest income	131	6	4
Interest expense, net	$ (218)	$ (371)	$ (391)

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.