Segment Information (Segment Sales by Customer) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Segment Reporting Information
Net sales	$ 683,954	$ 754,843
Commercial Customer
Segment Reporting Information
Net sales	314,163	420,931
U.S. Government Customer
Segment Reporting Information
Net sales	301,170	273,317
Other Customer
Segment Reporting Information
Net sales	68,621	60,595
Aircraft Controls
Segment Reporting Information
Net sales	286,774	339,954
Aircraft Controls | Commercial Customer
Segment Reporting Information
Net sales	81,076	166,260
Aircraft Controls | U.S. Government Customer
Segment Reporting Information
Net sales	156,677	132,209
Aircraft Controls | Other Customer
Segment Reporting Information
Net sales	49,021	41,485
Space And Defense Controls
Segment Reporting Information
Net sales	188,162	186,240
Space And Defense Controls | Commercial Customer
Segment Reporting Information
Net sales	31,134	34,152
Space And Defense Controls | U.S. Government Customer
Segment Reporting Information
Net sales	138,172	134,687
Space And Defense Controls | Other Customer
Segment Reporting Information
Net sales	18,856	17,401
Industrial Systems
Segment Reporting Information
Net sales	209,018	228,649
Industrial Systems | Commercial Customer
Segment Reporting Information
Net sales	201,953	220,519
Industrial Systems | U.S. Government Customer
Segment Reporting Information
Net sales	6,321	6,421
Industrial Systems | Other Customer
Segment Reporting Information
Net sales	$ 744	$ 1,709