OTHER FINANCIAL INFORMATION - Schedule of Accrued Expenses (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023
Other Financial Information [Abstract]
Customer advances (contract liabilities)	$ 1,100	$ 861
Employee compensation	531	618
Income taxes	220	207
Operating lease liabilities (current)	155	144
Product warranty	$ 74	$ 84
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses	Accrued expenses