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SEGMENTS - Net Sales by Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues	$ 7,940	$ 6,585	$ 5,429
Operating Segments | Power & Control
Segment Reporting Information [Line Items]
Revenues	3,941	3,316	2,873
Operating Segments | Airframe
Segment Reporting Information [Line Items]
Revenues	3,809	3,094	2,391
Operating Segments | Non-aviation
Segment Reporting Information [Line Items]
Revenues	190	175	165
Commercial OEM [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
Revenues	840	690	603
Commercial OEM [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
Revenues	1,280	989	715
Commercial Aftermarket [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
Revenues	1,198	1,057	847
Commercial Aftermarket [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
Revenues	1,289	1,112	785
Defense [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
Revenues	1,903	1,569	1,423
Defense [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
Revenues	$ 1,240	$ 993	$ 891

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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