Income Taxes (Schedule of Components of Income Tax Expense (Benefit), Current and Deferred) (Details) - USD ($) $ in Millions	3 Months Ended						12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Current:
Federal							$ 305	$ 219	$ 16
State and local							68	69	30
Non-U.S.							79	84	93
Total current							452	372	139
Deferred:
Federal							(89)	(23)	42
State and local							12	11	(27)
Non-U.S.							(27)	(28)	(1)
Total deferred							(104)	(40)	14
Provision for/(benefit from) income taxes	$ 80	$ 143	$ (33)	$ 209	$ (27)	$ (3)	$ 348	$ 332	$ 153