OTHER FINANCIAL DATA - Schedule of Accrued Expenses (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Other Financial Data [Abstract]
Customer advances (contract liabilities)	$ 1,031	$ 1,043
Employee compensation	740	706
Income taxes	130	587
Operating lease liabilities (current)	138	158
Product warranty	$ 90	$ 82
Current lease liabilities (accrued expenses)[Extensible Enumeration]	Accrued expenses	Accrued expenses