Segments (Segment Information And Reconciliations To Consolidated Amounts) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 765,207	$ 740,969	$ 718,811	$ 679,676	$ 700,866	$ 692,018	$ 689,049	$ 627,535	$ 2,904,663	$ 2,709,468	$ 2,497,524
Total operating profit									321,142	262,351	258,847
Interest expense									39,269	36,238	34,551
Equity-based compensation expense									6,464	5,804	4,582
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component									12,746	6,778	12,594
Corporate expenses and other, net									28,905	29,694	25,409
Earnings before income taxes									233,758	183,837	181,711
Depreciation and amortization									85,260	88,572	90,167
Identifiable assets	3,114,237				2,964,048				3,114,237	2,964,048	3,090,592
Capital expenditures									118,422	94,517	75,798
Aircraft Controls
Segment Reporting Information [Line Items]
Net sales									1,302,972	1,193,505	1,124,885
Total operating profit									122,701	129,772	116,797
Depreciation and amortization									41,144	40,795	41,977
Identifiable assets	1,300,781				1,168,964				1,300,781	1,168,964	1,120,099
Capital expenditures									68,595	46,705	36,216
Space and Defense Controls
Segment Reporting Information [Line Items]
Net sales									683,468	580,877	529,203
Total operating profit									88,990	67,615	49,989
Depreciation and amortization									18,014	17,900	18,980
Identifiable assets	737,141				660,589				737,141	660,589	575,132
Capital expenditures									23,903	22,452	15,173
Industrial Systems
Segment Reporting Information [Line Items]
Net sales									918,223	935,086	843,436
Total operating profit									109,451	64,964	92,061
Depreciation and amortization									25,454	28,825	28,099
Identifiable assets	1,040,659				1,077,022				1,040,659	1,077,022	1,124,950
Capital expenditures									25,808	25,156	23,953
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization									648	1,052	1,111
Identifiable assets	$ 35,656				$ 57,473				35,656	57,473	270,411
Capital expenditures									116	204	456
Military | Aircraft Controls
Segment Reporting Information [Line Items]
Net sales									622,126	571,886	522,110
Commercial | Aircraft Controls
Segment Reporting Information [Line Items]
Net sales									680,846	621,619	602,775
Space | Space and Defense Controls
Segment Reporting Information [Line Items]
Net sales									218,970	214,741	187,217
Defense | Space and Defense Controls
Segment Reporting Information [Line Items]
Net sales									464,498	366,136	341,986
Energy | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									120,771	163,888	145,344
Industrial Automation | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									447,515	430,754	377,211
Simulation and Test | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									122,935	127,321	126,135
Medical | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									227,002	213,123	194,745
Commercial
Segment Reporting Information [Line Items]
Net sales									1,693,423	1,643,042	1,578,921
Commercial | Aircraft Controls
Segment Reporting Information [Line Items]
Net sales									680,846	621,619	602,775
Commercial | Space and Defense Controls
Segment Reporting Information [Line Items]
Net sales									124,445	116,984	170,212
Commercial | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									888,132	904,439	805,934
U.S. Government (including OEM)
Segment Reporting Information [Line Items]
Net sales									1,017,905	897,882	771,740
U.S. Government (including OEM) | Aircraft Controls
Segment Reporting Information [Line Items]
Net sales									484,203	447,148	388,697
U.S. Government (including OEM) | Space and Defense Controls
Segment Reporting Information [Line Items]
Net sales									513,250	424,848	354,817
U.S. Government (including OEM) | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									20,452	25,886	28,226
Other
Segment Reporting Information [Line Items]
Net sales									193,335	168,544	146,863
Other | Aircraft Controls
Segment Reporting Information [Line Items]
Net sales									137,923	124,738	133,413
Other | Space and Defense Controls
Segment Reporting Information [Line Items]
Net sales									45,773	39,045	4,174
Other | Industrial Systems
Segment Reporting Information [Line Items]
Net sales									$ 9,639	$ 4,761	$ 9,276