Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (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
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)							$ 305	$ 219	$ 16
Current State and Local Tax Expense (Benefit)							68	69	30
Current Foreign Tax Expense (Benefit)							79	84	93
Current Income Tax Expense (Benefit)							452	372	139
Deferred Federal Income Tax Expense (Benefit)							(89)	(23)	42
Deferred State and Local Income Tax Expense (Benefit)							12	11	(27)
Deferred Foreign Income Tax Expense (Benefit)							(27)	(28)	(1)
Deferred Income Tax Expense (Benefit)							(104)	(40)	14
Provision for/(benefit from) income taxes	$ 80	$ 143	$ (33)	$ 209	$ (27)	$ (3)	348	332	153
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of fiscal year			$ 1,015			$ 948	1,015	948	957
Additions for tax positions of the current year							30	25	7
Additions for tax positions of prior years							28	133	19
Reductions for tax positions of prior years							(87)	(16)	(19)
Settlements with tax authorities							(3)	(73)	(12)
Expiration of the statute of limitations							(2)	(2)	(4)
Balance at end of fiscal year							$ 981	$ 1,015	$ 948