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Summary Of Significant Accounting Policies (Recent Accounting Pronouncements) (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	Sep. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle
Receivables	$ 957,287				$ 793,911				$ 957,287	$ 793,911		$ 883,032
Inventory, Net	534,974				512,522				534,974	512,522		446,531
Assets, Current	1,628,973				1,478,543				1,628,973	1,478,543
Deferred income taxes	19,992				17,328				19,992	17,328		17,462
Assets	3,114,237				2,964,048				3,114,237	2,964,048	$ 3,090,592
Customer Advances, Current	137,242				151,687				137,242	151,687		152,608
Provision for Loss on Contracts	60,914				48,818				60,914	48,818
Accrued Liabilities, Current	188,725				169,762				188,725	169,762		173,331
Liabilities, Current	727,658				680,624				727,658	680,624
Deferred Tax Liabilities, Net, Noncurrent	40,528				46,477				40,528	46,477		50,328
Liabilities	1,791,756				1,739,062				1,791,756	1,739,062
Retained Earnings (Accumulated Deficit)	2,133,328				1,973,514				2,133,328	1,973,514		1,988,437
Accumulated Other Comprehensive Income (Loss), Net of Tax	(420,066)				(372,181)				(420,066)	(372,181)
Stockholders' Equity Attributable to Parent	1,322,481				1,224,986				1,322,481	1,224,986	1,214,304
Liabilities and Equity	3,114,237				2,964,048				3,114,237	2,964,048
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
Cost of Goods and Services Sold									2,088,831	1,923,179	1,763,758
Gross profit	207,010	211,919	197,401	199,502	199,113	197,661	192,932	184,385	815,832	774,091	733,766
Research and Development Expense									126,453	129,838	144,157
Selling, General and Administrative Expense									404,653	388,434	346,281
Other Operating Income (Expense), Net									11,699	6,950	27,066
Operating Income (Loss)									321,142	262,351	258,847
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component									12,746	6,778	12,594
Corporate Expenses And Other									28,905	29,694	25,409
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									233,758	183,837	181,711
Income Tax Expense (Benefit)									54,010	87,209	41,301
Net Income (Loss) Attributable to Parent	$ 45,855	$ 47,465	$ 42,359	$ 44,069	40,560	$ 40,683	$ 13,965	$ 1,299	$ 179,748	96,507	141,280
Accounting Standards Update 2016-02 | Pro Forma
New Accounting Pronouncements or Change in Accounting Principle
Impact of Adopting Accounting Pronouncement	2.00%								2.00%
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle
Receivables												89,121
Inventory, Net												(65,991)
Deferred income taxes												134
Customer Advances, Current												921
Accrued Liabilities, Current												3,569
Deferred Tax Liabilities, Net, Noncurrent												3,851
Retained Earnings (Accumulated Deficit)												$ 14,923
Restatement Adjustment | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle
Cost of Goods and Services Sold										(1,104)	(2,244)
Gross profit										1,104	2,244
Research and Development Expense										(348)	(490)
Selling, General and Administrative Expense										(5,326)	(9,860)
Other Operating Income (Expense), Net										6,778	12,594
Operating Income (Loss)										4,499	8,695
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component										6,778	12,594
Corporate Expenses And Other										(2,279)	(3,899)
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle
Cost of Goods and Services Sold										1,924,283	1,766,002
Gross profit										772,987	731,522
Research and Development Expense										130,186	144,647
Selling, General and Administrative Expense										393,760	356,141
Other Operating Income (Expense), Net										172	14,472
Operating Income (Loss)										257,852	250,152
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component										0	0
Corporate Expenses And Other										31,973	29,308
Previous Accounting Guidance
New Accounting Pronouncements or Change in Accounting Principle
Receivables	$ 839,504								$ 839,504
Inventory, Net	618,909								618,909
Assets, Current	1,595,125								1,595,125
Deferred income taxes	20,086								20,086
Assets	3,080,483								3,080,483
Customer Advances, Current	137,307								137,307
Accrued Liabilities, Current	183,075								183,075
Liabilities, Current	722,073								722,073
Deferred Tax Liabilities, Net, Noncurrent	36,913								36,913
Liabilities	1,782,556								1,782,556
Retained Earnings (Accumulated Deficit)	2,108,955								2,108,955
Accumulated Other Comprehensive Income (Loss), Net of Tax	(420,247)								(420,247)
Stockholders' Equity Attributable to Parent	1,297,927								1,297,927
Liabilities and Equity	3,080,483								3,080,483
Net sales									2,877,068
Cost of Goods and Services Sold									2,073,519
Gross profit									803,549
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									221,475
Income Tax Expense (Benefit)									51,177
Net Income (Loss) Attributable to Parent									170,298
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle
Receivables	117,783								117,783
Inventory, Net	(83,935)								(83,935)
Assets, Current	33,848								33,848
Deferred income taxes	(94)								(94)
Assets	33,754								33,754
Customer Advances, Current	(65)								(65)
Accrued Liabilities, Current	5,650								5,650
Liabilities, Current	5,585								5,585
Deferred Tax Liabilities, Net, Noncurrent	3,615								3,615
Liabilities	9,200								9,200
Retained Earnings (Accumulated Deficit)	24,373								24,373
Accumulated Other Comprehensive Income (Loss), Net of Tax	181								181
Stockholders' Equity Attributable to Parent	24,554								24,554
Liabilities and Equity	33,754								33,754
Net sales									27,595
Cost of Goods and Services Sold									15,312
Gross profit									12,283
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									12,283
Income Tax Expense (Benefit)									2,833
Net Income (Loss) Attributable to Parent									9,450
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle
Receivables	957,287								957,287
Inventory, Net	534,974								534,974
Assets, Current	1,628,973								1,628,973
Deferred income taxes	19,992								19,992
Assets	3,114,237								3,114,237
Customer Advances, Current	137,242								137,242
Accrued Liabilities, Current	188,725								188,725
Liabilities, Current	727,658								727,658
Deferred Tax Liabilities, Net, Noncurrent	40,528								40,528
Liabilities	1,791,756								1,791,756
Retained Earnings (Accumulated Deficit)	2,133,328								2,133,328
Accumulated Other Comprehensive Income (Loss), Net of Tax	(420,066)								(420,066)
Stockholders' Equity Attributable to Parent	1,322,481								1,322,481
Liabilities and Equity	3,114,237								3,114,237
Net sales									2,904,663
Cost of Goods and Services Sold									2,088,831
Gross profit									815,832
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									233,758
Income Tax Expense (Benefit)									54,010
Net Income (Loss) Attributable to Parent									179,748
Aircraft Controls
New Accounting Pronouncements or Change in Accounting Principle
Assets	1,300,781				1,168,964				1,300,781	1,168,964	1,120,099
Net sales									1,302,972	1,193,505	1,124,885
Operating Income (Loss)									122,701	129,772	116,797
Aircraft Controls | Restatement Adjustment | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle
Operating Income (Loss)										1,107	2,781
Aircraft Controls | Previously Reported
New Accounting Pronouncements or Change in Accounting Principle
Operating Income (Loss)										128,665	114,016
Space and Defense Controls
New Accounting Pronouncements or Change in Accounting Principle
Assets	737,141				660,589				737,141	660,589	575,132
Net sales									683,468	580,877	529,203
Operating Income (Loss)									88,990	67,615	49,989
Space and Defense Controls | Restatement Adjustment | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle
Operating Income (Loss)										740	1,472
Space and Defense Controls | Previously Reported
New Accounting Pronouncements or Change in Accounting Principle
Operating Income (Loss)										66,875	48,517
Industrial Systems
New Accounting Pronouncements or Change in Accounting Principle
Assets	$ 1,040,659				$ 1,077,022				1,040,659	1,077,022	1,124,950
Net sales									918,223	935,086	843,436
Operating Income (Loss)									$ 109,451	64,964	92,061
Industrial Systems | Restatement Adjustment | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle
Operating Income (Loss)										2,652	4,442
Industrial Systems | Previously Reported
New Accounting Pronouncements or Change in Accounting Principle
Operating Income (Loss)										$ 62,312	$ 87,619

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