Goodwill And Other Intangibles (Schedule Of Gross Carrying Amount And Accumulated Amortization Of Identifiable Intangible Assets By Major Class) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	$ 10,111	$ 9,671
Less: Accumulated amortization	3,848	3,099
Net carrying amount	6,263	6,572
Customer Relationships
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	4,623	4,393
Less: Accumulated amortization	1,270	957
Net carrying amount	3,353	3,436
Intellectual Property
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	4,118	3,961
Less: Accumulated amortization	1,411	1,027
Net carrying amount	2,707	2,934
Capitalized Software
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	1,370	1,317
Less: Accumulated amortization	1,167	1,115
Net carrying amount	$ 203	$ 202