Segment Information (Segment Sales By Market Type) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Segment Reporting Information
Net sales	$ 765,277	$ 718,811	$ 1,520,120	$ 1,398,487
Aircraft Controls
Segment Reporting Information
Net sales	341,407	320,627	681,361	624,672
Aircraft Controls | Military
Segment Reporting Information
Net sales	175,784	155,016	349,478	301,817
Aircraft Controls | Commercial
Segment Reporting Information
Net sales	165,623	165,611	331,883	322,855
Space And Defense Controls
Segment Reporting Information
Net sales	193,010	164,825	379,250	320,893
Space And Defense Controls | Space
Segment Reporting Information
Net sales	73,564	53,349	136,304	103,525
Space And Defense Controls | Defense
Segment Reporting Information
Net sales	119,446	111,476	242,946	217,368
Industrial Systems
Segment Reporting Information
Net sales	230,860	233,359	459,509	452,922
Industrial Systems | Energy
Segment Reporting Information
Net sales	36,772	29,977	66,711	59,274
Industrial Systems | Industrial Automation
Segment Reporting Information
Net sales	106,177	116,369	213,008	225,499
Industrial Systems | Simulation and Test
Segment Reporting Information
Net sales	25,647	31,245	54,115	60,295
Industrial Systems | Medical
Segment Reporting Information
Net sales	$ 62,264	$ 55,768	$ 125,675	$ 107,854