Revenue Recognition and Contract Balances - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 1,424.7	$ 1,355.8	$ 2,808.0	$ 2,676.8
United States
Disaggregation of Revenue [Line Items]
Net sales	736.2	708.0	1,432.0	1,397.5
Europe
Disaggregation of Revenue [Line Items]
Net sales	338.7	280.8	662.7	568.1
Asia
Disaggregation of Revenue [Line Items]
Net sales	232.9	251.3	476.0	480.9
All other
Disaggregation of Revenue [Line Items]
Net sales	116.9	115.7	237.3	230.3
U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	316.8	343.3	628.1	653.5
Other
Disaggregation of Revenue [Line Items]
Net sales	1,107.9	1,012.5	2,179.9	2,023.3
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	793.3	775.8	1,565.8	1,526.3
Digital Imaging | United States
Disaggregation of Revenue [Line Items]
Net sales	356.4	348.3	690.8	685.5
Digital Imaging | Europe
Disaggregation of Revenue [Line Items]
Net sales	207.3	183.3	404.6	367.1
Digital Imaging | Asia
Disaggregation of Revenue [Line Items]
Net sales	152.4	163.7	310.8	313.3
Digital Imaging | All other
Disaggregation of Revenue [Line Items]
Net sales	77.2	80.5	159.6	160.4
Digital Imaging | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	131.3	165.6	261.6	307.1
Digital Imaging | Other
Disaggregation of Revenue [Line Items]
Net sales	662.0	610.2	1,304.2	1,219.2
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	328.4	312.5	661.9	621.4
Instrumentation | United States
Disaggregation of Revenue [Line Items]
Net sales	139.4	134.4	277.4	267.8
Instrumentation | Europe
Disaggregation of Revenue [Line Items]
Net sales	95.2	74.5	192.4	155.4
Instrumentation | Asia
Disaggregation of Revenue [Line Items]
Net sales	64.6	74.1	132.1	139.7
Instrumentation | All other
Disaggregation of Revenue [Line Items]
Net sales	29.2	29.5	60.0	58.5
Instrumentation | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	21.3	27.2	44.3	49.6
Instrumentation | Other
Disaggregation of Revenue [Line Items]
Net sales	307.1	285.3	617.6	571.8
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	186.0	168.8	359.2	335.0
Aerospace and Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Net sales	126.0	127.4	246.1	251.3
Aerospace and Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Net sales	36.2	23.0	65.7	45.6
Aerospace and Defense Electronics | Asia
Disaggregation of Revenue [Line Items]
Net sales	15.5	13.1	32.5	27.3
Aerospace and Defense Electronics | All other
Disaggregation of Revenue [Line Items]
Net sales	8.3	5.3	14.9	10.8
Aerospace and Defense Electronics | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	61.0	61.6	125.7	121.5
Aerospace and Defense Electronics | Other
Disaggregation of Revenue [Line Items]
Net sales	125.0	107.2	233.5	213.5
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	117.0	98.7	221.1	194.1
Engineered Systems | United States
Disaggregation of Revenue [Line Items]
Net sales	114.4	97.9	217.7	192.9
Engineered Systems | Europe
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Engineered Systems | Asia
Disaggregation of Revenue [Line Items]
Net sales	0.4	0.4	0.6	0.6
Engineered Systems | All other
Disaggregation of Revenue [Line Items]
Net sales	2.2	0.4	2.8	0.6
Engineered Systems | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	103.2	88.9	196.5	175.3
Engineered Systems | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 13.8	$ 9.8	$ 24.6	$ 18.8