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ACQUISITIONS - Simmonds Precision Products, Inc. (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 06, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Business Combination [Line Items]
Acquisition of businesses, net of cash acquired		$ 419	$ 2,347	$ 762
Simmonds Precision Products, Inc. | Subsequent Event
Business Combination [Line Items]
Acquisition of businesses, net of cash acquired	$ 757

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