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ACQUISITIONS - CPI's Electron Device Business (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 06, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Business Combination [Line Items]
Acquisition of businesses, net of cash acquired		$ 419	$ 2,347	$ 762
GOODWILL		10,612	$ 10,419	$ 8,988
CPI Electron Device Business
Business Combination [Line Items]
Acquisition of businesses, net of cash acquired	$ 1,386
GOODWILL		763
Other intangible assets		$ 509

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