Segment Information (Operating Profit By Segment And Reconciliation Of Segment Operating Profit To Earnings Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Segment Reporting Information
Operating profit (loss)	$ (1,860)	$ 84,112	$ 172,941	$ 241,343
Deductions from operating profit:
Interest expense	9,440	9,780	29,923	29,401
Equity-based compensation expense	1,390	1,439	4,661	5,130
Non-service pension expense	4,241	4,883	11,440	14,666
Corporate and other expenses, net	6,423	7,992	21,836	21,729
Earnings (loss) before income taxes	(23,354)	60,018	105,081	170,417
Aircraft Controls
Segment Reporting Information
Operating profit (loss)	(42,053)	34,484	31,240	94,805
Space And Defense Controls
Segment Reporting Information
Operating profit (loss)	22,290	24,133	72,224	63,110
Industrial Systems
Segment Reporting Information
Operating profit (loss)	$ 17,903	$ 25,495	$ 69,477	$ 83,428