OTHER FINANCIAL INFORMATION - Schedule of Accrued Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2024	Sep. 30, 2024
Other Financial Information [Abstract]
Customer advances (contract liabilities)	$ 1,037	$ 1,043
Employee compensation	453	706
Income taxes	714	587
Operating lease liabilities (current)	144	158
Product warranty	$ 79	$ 82
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses	Accrued expenses