Revenue Recognition and Contract Balances - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 1,402.5	$ 1,363.6	$ 4,210.5	$ 4,040.4
United States
Disaggregation of Revenue [Line Items]
Net sales	737.4	762.9	2,169.4	2,160.4
Europe
Disaggregation of Revenue [Line Items]
Net sales	325.4	256.7	988.1	824.8
Asia
Disaggregation of Revenue [Line Items]
Net sales	231.9	240.1	707.9	721.0
All other
Disaggregation of Revenue [Line Items]
Net sales	107.8	103.9	345.1	334.2
U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	350.8	347.7	989.3	1,001.2
Other
Disaggregation of Revenue [Line Items]
Net sales	1,051.7	1,015.9	3,221.2	3,039.2
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	775.8	777.9	2,341.6	2,304.2
Digital Imaging | United States
Disaggregation of Revenue [Line Items]
Net sales	358.6	367.6	1,049.4	1,053.1
Digital Imaging | Europe
Disaggregation of Revenue [Line Items]
Net sales	196.6	182.8	601.2	549.9
Digital Imaging | Asia
Disaggregation of Revenue [Line Items]
Net sales	150.0	158.8	460.8	472.1
Digital Imaging | All other
Disaggregation of Revenue [Line Items]
Net sales	70.6	68.7	230.2	229.1
Digital Imaging | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	151.5	156.3	413.1	463.4
Digital Imaging | Other
Disaggregation of Revenue [Line Items]
Net sales	624.3	621.6	1,928.5	1,840.8
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	329.1	306.4	991.0	927.8
Instrumentation | United States
Disaggregation of Revenue [Line Items]
Net sales	142.5	149.4	419.9	417.2
Instrumentation | Europe
Disaggregation of Revenue [Line Items]
Net sales	93.7	63.6	286.1	219.0
Instrumentation | Asia
Disaggregation of Revenue [Line Items]
Net sales	64.1	64.4	196.2	204.1
Instrumentation | All other
Disaggregation of Revenue [Line Items]
Net sales	28.8	29.0	88.8	87.5
Instrumentation | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	27.0	29.5	71.3	79.1
Instrumentation | Other
Disaggregation of Revenue [Line Items]
Net sales	302.1	276.9	919.7	848.7
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	183.3	169.5	542.5	504.5
Aerospace and Defense Electronics | United States
Disaggregation of Revenue [Line Items]
Net sales	123.7	136.5	369.8	387.8
Aerospace and Defense Electronics | Europe
Disaggregation of Revenue [Line Items]
Net sales	35.1	10.3	100.8	55.9
Aerospace and Defense Electronics | Asia
Disaggregation of Revenue [Line Items]
Net sales	17.0	16.6	49.5	43.9
Aerospace and Defense Electronics | All other
Disaggregation of Revenue [Line Items]
Net sales	7.5	6.1	22.4	16.9
Aerospace and Defense Electronics | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	69.8	62.8	205.9	184.3
Aerospace and Defense Electronics | Other
Disaggregation of Revenue [Line Items]
Net sales	113.5	106.7	336.6	320.2
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	114.3	109.8	335.4	303.9
Engineered Systems | United States
Disaggregation of Revenue [Line Items]
Net sales	112.6	109.4	330.3	302.3
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	0.8	0.3	1.4	0.9
Engineered Systems | All other
Disaggregation of Revenue [Line Items]
Net sales	0.9	0.1	3.7	0.7
Engineered Systems | U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	102.5	99.1	299.0	274.4
Engineered Systems | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 11.8	$ 10.7	$ 36.4	$ 29.5