Segment Information (Segment Sales By Customer Type) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Segment Reporting Information
Net sales	$ 740,969	$ 692,018	$ 2,139,456	$ 2,008,602
Aircraft Controls
Segment Reporting Information
Net sales	336,735	299,606	961,407	889,579
Aircraft Controls | Military
Segment Reporting Information
Net sales	162,285	143,963	464,102	423,822
Aircraft Controls | Commercial
Segment Reporting Information
Net sales	174,450	155,643	497,305	465,757
Space And Defense Controls
Segment Reporting Information
Net sales	173,045	149,815	493,938	426,735
Space And Defense Controls | Space
Segment Reporting Information
Net sales	55,737	54,599	159,262	161,801
Space And Defense Controls | Defense
Segment Reporting Information
Net sales	117,308	95,216	334,676	264,934
Industrial Systems
Segment Reporting Information
Net sales	231,189	242,597	684,111	692,288
Industrial Systems | Energy
Segment Reporting Information
Net sales	30,413	43,097	89,687	122,077
Industrial Systems | Industrial Automation
Segment Reporting Information
Net sales	113,784	114,703	339,283	319,471
Industrial Systems | Simulation and Test
Segment Reporting Information
Net sales	28,123	28,880	88,418	91,758
Industrial Systems | Medical
Segment Reporting Information
Net sales	$ 58,869	$ 55,917	$ 166,723	$ 158,982