Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,355.8	$ 1,121.0	$ 2,676.8	$ 1,926.7
United States
Disaggregation of Revenue [Line Items]
Net sales	861.3	709.1	1,689.7	1,232.9
Europe
Disaggregation of Revenue [Line Items]
Net sales	285.1	249.1	566.8	405.6
All other
Disaggregation of Revenue [Line Items]
Net sales	209.4	162.8	420.3	288.2
United States Government
Disaggregation of Revenue [Line Items]
Net sales	343.3	276.9	653.5	484.5
Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	1,012.5	844.1	2,023.3	1,442.2
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	775.8	579.5	1,526.3	842.8
Digital Imaging | United States
Disaggregation of Revenue [Line Items]
Net sales	375.7	265.8	736.8	346.0
Digital Imaging | Europe
Disaggregation of Revenue [Line Items]
Net sales	204.9	163.1	405.3	235.3
Digital Imaging | All other
Disaggregation of Revenue [Line Items]
Net sales	195.2	150.6	384.2	261.5
Digital Imaging | United States Government
Disaggregation of Revenue [Line Items]
Net sales	165.6	112.8	307.1	144.9
Digital Imaging | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	610.2	466.7	1,219.2	697.9
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	312.5	291.1	621.4	577.6
Instrumentation | United States
Disaggregation of Revenue [Line Items]
Net sales	243.9	218.4	473.6	431.8
Instrumentation | Europe
Disaggregation of Revenue [Line Items]
Net sales	54.4	60.5	111.7	119.1
Instrumentation | All other
Disaggregation of Revenue [Line Items]
Net sales	14.2	12.2	36.1	26.7
Instrumentation | United States Government
Disaggregation of Revenue [Line Items]
Net sales	27.2	20.8	49.6	43.4
Instrumentation | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	285.3	270.3	571.8	534.2
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	168.8	152.4	335.0	303.6
Aerospace and Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Net sales	143.0	126.9	285.2	252.4
Aerospace and Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Net sales	25.8	25.5	49.8	51.2
Aerospace and Defense Electronics | All other
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Aerospace and Defense Electronics | United States Government
Disaggregation of Revenue [Line Items]
Net sales	61.6	54.9	121.5	108.6
Aerospace and Defense Electronics | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	107.2	97.5	213.5	195.0
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	98.7	98.0	194.1	202.7
Engineered Systems | United States
Disaggregation of Revenue [Line Items]
Net sales	98.7	98.0	194.1	202.7
Engineered Systems | Europe
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Engineered Systems | All other
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Engineered Systems | United States Government
Disaggregation of Revenue [Line Items]
Net sales	88.9	88.4	175.3	187.6
Engineered Systems | Other, Primarily Commercial
Disaggregation of Revenue [Line Items]
Net sales	$ 9.8	$ 9.6	$ 18.8	$ 15.1