Segments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 03, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Revenue, Major Customer and Product Lines
Sales	$ 706,895	$ 657,539	$ 765,277	$ 754,843	$ 765,207	$ 740,969	$ 718,811	$ 679,676	$ 2,884,554	$ 2,904,663	$ 2,709,468
Aircraft Controls
Revenue, Major Customer and Product Lines
Sales									$ 1,205,750	$ 1,302,972	$ 1,193,505
Aircraft Controls | Aftermarket Sales | Net Sales, Segment
Revenue, Major Customer and Product Lines
Percentage of sales									30.00%	27.00%	29.00%
Boeing
Revenue, Major Customer and Product Lines
Sales									$ 402,960	$ 370,306	$ 382,184
Boeing | Customer Concentration Risk | Net Sales
Revenue, Major Customer and Product Lines
Percentage of sales									14.00%	13.00%	14.00%
Boeing Commercial Airplanes
Revenue, Major Customer and Product Lines
Sales									$ 206,648	$ 264,805	$ 238,118
Government Prime and Sub-Contract
Revenue, Major Customer and Product Lines
Sales									$ 1,187,322	$ 1,017,905	$ 897,882