Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Tax Contingency [Line Items]
Current Federal Tax Expense (Benefit)	$ 254	$ 34	$ (989)
Current State and Local Tax Expense (Benefit)	69	29	92
Current Foreign Tax Expense (Benefit)	84	93	112
Current Income Tax Expense (Benefit)	407	156	(785)
Deferred Federal Income Tax Expense (Benefit)	(8)	30	539
Deferred State and Local Income Tax Expense (Benefit)	13	(22)	(28)
Deferred Foreign Income Tax Expense (Benefit)	(36)	(1)	(15)
Deferred Income Tax Expense (Benefit)	(31)	7	496
Income Tax Expense (Benefit)	376	163	(289)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of fiscal year	943	932	998
Additions for tax positions of the current year	25	7	121
Additions for tax positions of prior years	133	39	223
Reductions for tax positions of prior years	(16)	(19)	(138)
Settlements with tax authorities	(73)	(12)	(271)
Expiration of the statute of limitations	(2)	(4)	(1)
Balance at end of fiscal year	$ 1,010	$ 943	$ 932