Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Net earnings	$ 2,914,566	$ 2,382,790	$ 2,245,832
Interest Expense, net	(45,147)	(32,731)	(32,787)
Consolidated earnings before income taxes	275,768	199,898	245,799
Aerospace [Member]
Segment Reporting Information [Line Items]
Net earnings	1,768,103	1,519,322	1,404,117
Industrial [Member]
Segment Reporting Information [Line Items]
Net earnings	1,146,463	863,468	841,715
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Net earnings	1,768,103	1,519,322	1,404,117
Segment earnings (loss)	290,104	230,933	234,356
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Net earnings	1,146,463	863,468	841,715
Segment earnings (loss)	161,622	82,788	108,672
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (130,811)	$ (81,092)	$ (64,442)