FINANCIAL INSTRUMENTS - Narrative (Details) $ / shares in Units, € in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2024 EUR (€)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2024 USD ($)	Apr. 12, 2023 $ / shares	Sep. 30, 2019 EUR (€)
Derivative [Line Items]
Mark-to-market gain		$ 24	$ (50)
National Instruments
Derivative [Line Items]
Business acquisition, purchase price per share (in dollars per share) | $ / shares					$ 60
National Instruments
Derivative [Line Items]
Investments		136
Mark-to-market gain		56
Level 2
Derivative [Line Items]
Fair value of long-term debt		6,900		$ 7,000
Fair value of long term debt compared with carrying value, higher (lower)		$ 1,275		(705)
Senior Notes
Derivative [Line Items]
Debt, face amount | €						€ 1,500
Repayments of debt | €	€ 500
Foreign currency
Derivative [Line Items]
Notional value of hedge positions				$ 3,300