Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2022	Apr. 04, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,321.0	$ 805.7
United States
Disaggregation of Revenue [Line Items]
Net sales	828.4	523.8
Europe
Disaggregation of Revenue [Line Items]
Net sales	281.7	156.5
All other
Disaggregation of Revenue [Line Items]
Net sales	210.9	125.4
United States Government
Disaggregation of Revenue [Line Items]
Net sales	310.2	207.6
Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	1,010.8	598.1
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	750.5	263.3
Digital Imaging | United States
Disaggregation of Revenue [Line Items]
Net sales	361.1	80.2
Digital Imaging | Europe
Disaggregation of Revenue [Line Items]
Net sales	200.4	72.2
Digital Imaging | All other
Disaggregation of Revenue [Line Items]
Net sales	189.0	110.9
Digital Imaging | United States Government
Disaggregation of Revenue [Line Items]
Net sales	141.5	32.1
Digital Imaging | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	609.0	231.2
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	308.9	286.5
Instrumentation | United States
Disaggregation of Revenue [Line Items]
Net sales	229.7	213.4
Instrumentation | Europe
Disaggregation of Revenue [Line Items]
Net sales	57.3	58.6
Instrumentation | All other
Disaggregation of Revenue [Line Items]
Net sales	21.9	14.5
Instrumentation | United States Government
Disaggregation of Revenue [Line Items]
Net sales	22.4	22.6
Instrumentation | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	286.5	263.9
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	166.2	151.2
Aerospace and Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Net sales	142.2	125.5
Aerospace and Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Net sales	24.0	25.7
Aerospace and Defense Electronics | All other
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Aerospace and Defense Electronics | United States Government
Disaggregation of Revenue [Line Items]
Net sales	59.9	53.7
Aerospace and Defense Electronics | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	106.3	97.5
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	95.4	104.7
Engineered Systems | United States
Disaggregation of Revenue [Line Items]
Net sales	95.4	104.7
Engineered Systems | Europe
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Engineered Systems | All other
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0
Engineered Systems | United States Government
Disaggregation of Revenue [Line Items]
Net sales	86.4	99.2
Engineered Systems | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	$ 9.0	$ 5.5