OTHER FINANCIAL DATA - Schedule of Other Items Reported In Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Other Financial Data [Abstract]
Research and development expense	$ 771	$ 781	$ 523
Rent expense	$ 232	$ 245	$ 210