Segment Information (Segment Sales By Market Type) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Apr. 03, 2021	Mar. 28, 2020
Segment Reporting Information
Net sales	$ 736,402	$ 765,277	$ 1,420,356	$ 1,520,120
Aircraft Controls
Segment Reporting Information
Net sales	304,361	341,407	591,135	681,361
Aircraft Controls | Military
Segment Reporting Information
Net sales	201,520	175,784	407,218	349,478
Aircraft Controls | Commercial
Segment Reporting Information
Net sales	102,841	165,623	183,917	331,883
Space And Defense Controls
Segment Reporting Information
Net sales	206,168	193,010	394,330	379,250
Space And Defense Controls | Space
Segment Reporting Information
Net sales	87,837	73,564	165,648	136,304
Space And Defense Controls | Defense
Segment Reporting Information
Net sales	118,331	119,446	228,682	242,946
Industrial Systems
Segment Reporting Information
Net sales	225,873	230,860	434,891	459,509
Industrial Systems | Energy
Segment Reporting Information
Net sales	28,247	36,772	56,891	66,711
Industrial Systems | Industrial Automation
Segment Reporting Information
Net sales	111,206	106,177	206,437	213,008
Industrial Systems | Simulation and Test
Segment Reporting Information
Net sales	19,774	25,647	39,900	54,115
Industrial Systems | Medical
Segment Reporting Information
Net sales	$ 66,646	$ 62,264	$ 131,663	$ 125,675