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Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net earnings	$ 3,324,249	$ 2,914,566	$ 2,382,790
Interest Expense, net	(41,501)	(45,147)	(32,731)
Consolidated earnings before income taxes	453,971	275,768	199,898
Aerospace [Member]
Segment Reporting Information [Line Items]
Net earnings	2,028,618	1,768,103	1,519,322
Industrial [Member]
Segment Reporting Information [Line Items]
Net earnings	1,295,631	1,146,463	863,468
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Net earnings	2,028,618	1,768,103	1,519,322
Segment earnings (loss)	385,360	290,104	230,933
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Net earnings	1,295,631	1,146,463	863,468
Segment earnings (loss)	229,857	161,622	82,788
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (119,745)	$ (130,811)	$ (81,092)

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