OTHER FINANCIAL INFORMATION - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 15,443	$ 10,111
Less: Accumulated amortization	4,816	3,848
Net carrying amount	10,627	6,263
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Net carrying amount	6,325	3,353
Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Net carrying amount	$ 4,067	$ 2,707