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, 2024	Sep. 30, 2023
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	$ 15,628	$ 10,111
Less: Accumulated amortization	5,192	3,848
Net carrying amount	10,436	6,263
Customer Relationships
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	8,114	4,623
Less: Accumulated amortization	1,818	1,270
Net carrying amount	6,296	3,353
Intellectual Property
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	6,017	4,118
Less: Accumulated amortization	2,116	1,411
Net carrying amount	3,901	2,707
Capitalized Software
Intangibles Other Than Goodwill [Line Items]
Gross carrying amount	1,497	1,370
Less: Accumulated amortization	1,258	1,167
Net carrying amount	$ 239	$ 203