Restructuring (Restructuring Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 8,113	$ 1,168	$ 7,846
Charged to expense	0	28,794	0
Adjustment to provision	284	111	(1,743)
Foreign currency translation	(423)	(341)	43
Balance at end of period	4,123	8,113	1,168
2014 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(533)
2015 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(426)
2016 Plan
Restructuring Reserve [Roll Forward]
Cash payments	(446)	(698)	(4,019)
2018 Plan
Restructuring Reserve [Roll Forward]
Cash payments	(3,405)	(6,443)
Non-cash charges		(26,676)
Balance at end of period	4,123
Aircraft Controls
Restructuring Reserve [Roll Forward]
Balance at beginning of period	626	130	1,474
Adjustment to provision	13	0	(852)
Foreign currency translation	(7)	(7)	(4)
Balance at end of period	0	626	130
Aircraft Controls | 2014 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(116)
Aircraft Controls | 2015 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(210)
Aircraft Controls | 2016 Plan
Restructuring Reserve [Roll Forward]
Cash payments	0	(99)	(162)
Aircraft Controls | 2018 Plan
Restructuring Reserve [Roll Forward]
Cash payments	(632)	(385)
Non-cash charges		0
Space and Defense Controls
Restructuring Reserve [Roll Forward]
Balance at beginning of period	64	0	665
Adjustment to provision	(21)	119	(72)
Foreign currency translation	0	0	0
Balance at end of period	27	64	0
Space and Defense Controls | 2014 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(417)
Space and Defense Controls | 2015 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(176)
Space and Defense Controls | 2016 Plan
Restructuring Reserve [Roll Forward]
Cash payments	0	0	0
Space and Defense Controls | 2018 Plan
Restructuring Reserve [Roll Forward]
Charged to expense		46
Cash payments	(16)	(101)
Non-cash charges		0
Industrial Systems
Restructuring Reserve [Roll Forward]
Balance at beginning of period	6,994	0	3,980
Adjustment to provision	275	2	(819)
Foreign currency translation	(416)	(334)	47
Balance at end of period	4,096	6,994	0
Industrial Systems | 2014 Plan
Restructuring Reserve [Roll Forward]
Cash payments			0
Industrial Systems | 2015 Plan
Restructuring Reserve [Roll Forward]
Cash payments			(40)
Industrial Systems | 2016 Plan
Restructuring Reserve [Roll Forward]
Cash payments	0	0	(3,168)
Industrial Systems | 2018 Plan
Restructuring Reserve [Roll Forward]
Cash payments	(2,757)	(5,607)
Non-cash charges		(26,676)
Corporate
Restructuring Reserve [Roll Forward]
Balance at beginning of period	429	1,038	1,727
Adjustment to provision	17	(10)	0
Foreign currency translation	0	0	0
Balance at end of period	0	429	1,038
Corporate | 2014 Plan
Restructuring Reserve [Roll Forward]
Cash payments			0
Corporate | 2015 Plan
Restructuring Reserve [Roll Forward]
Cash payments			0
Corporate | 2016 Plan
Restructuring Reserve [Roll Forward]
Cash payments	(446)	(599)	$ (689)
Corporate | 2018 Plan
Restructuring Reserve [Roll Forward]
Cash payments	$ 0	(350)
Non-cash charges		0
Employee severence and other restructuring | 2018 Plan
Restructuring Reserve [Roll Forward]
Charged to expense		40,992
Employee severence and other restructuring | Aircraft Controls | 2018 Plan
Restructuring Reserve [Roll Forward]
Charged to expense		987
Employee Severance | 2018 Plan
Restructuring Reserve [Roll Forward]
Charged to expense		7,969
Employee Severance | Industrial Systems | 2018 Plan
Restructuring Reserve [Roll Forward]
Charged to expense		39,609
Employee Severance | Corporate | 2018 Plan
Restructuring Reserve [Roll Forward]
Charged to expense		$ 350