Revenue Recognition and Contract Balances - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2025	Jun. 30, 2024	Jun. 29, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 1,513.7	$ 1,374.1	$ 2,963.6	$ 2,724.2
United States
Disaggregation of Revenue [Line Items]
Net sales	767.5	717.6	1,536.8	1,412.4
Europe
Disaggregation of Revenue [Line Items]
Net sales	392.0	317.7	733.6	649.1
Asia
Disaggregation of Revenue [Line Items]
Net sales	217.8	218.8	439.6	431.8
All Other
Disaggregation of Revenue [Line Items]
Net sales	136.4	120.0	253.6	230.9
U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	379.5	308.1	751.3	610.8
Other
Disaggregation of Revenue [Line Items]
Net sales	1,134.2	1,066.0	2,212.3	2,113.4
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	771.0	739.4	1,528.0	1,480.2
Digital Imaging \| United States
Disaggregation of Revenue [Line Items]
Net sales	341.8	325.3	697.7	659.0
Digital Imaging \| Europe
Disaggregation of Revenue [Line Items]
Net sales	212.9	201.7	401.1	402.0
Digital Imaging \| Asia
Disaggregation of Revenue [Line Items]
Net sales	135.1	136.5	274.8	270.7
Digital Imaging \| All Other
Disaggregation of Revenue [Line Items]
Net sales	81.2	75.9	154.4	148.5
Digital Imaging \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	141.3	122.3	303.0	253.0
Digital Imaging \| Other
Disaggregation of Revenue [Line Items]
Net sales	629.7	617.1	1,225.0	1,227.2
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	367.6	333.5	710.9	663.9
Instrumentation \| United States
Disaggregation of Revenue [Line Items]
Net sales	150.9	153.4	298.9	298.0
Instrumentation \| Europe
Disaggregation of Revenue [Line Items]
Net sales	113.9	82.6	216.4	179.5
Instrumentation \| Asia
Disaggregation of Revenue [Line Items]
Net sales	59.1	61.9	117.9	122.0
Instrumentation \| All Other
Disaggregation of Revenue [Line Items]
Net sales	43.7	35.6	77.7	64.4
Instrumentation \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	32.6	29.3	59.9	62.7
Instrumentation \| Other
Disaggregation of Revenue [Line Items]
Net sales	335.0	304.2	651.0	601.2
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	264.8	194.4	507.3	380.1
Aerospace and Defense Electronics \| United States
Disaggregation of Revenue [Line Items]
Net sales	166.1	132.9	325.2	256.6
Aerospace and Defense Electronics \| Europe
Disaggregation of Revenue [Line Items]
Net sales	65.2	33.4	116.1	67.6
Aerospace and Defense Electronics \| Asia
Disaggregation of Revenue [Line Items]
Net sales	22.7	20.1	45.7	38.7
Aerospace and Defense Electronics \| All Other
Disaggregation of Revenue [Line Items]
Net sales	10.8	8.0	20.3	17.2
Aerospace and Defense Electronics \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	114.2	60.8	204.4	119.6
Aerospace and Defense Electronics \| Other
Disaggregation of Revenue [Line Items]
Net sales	150.6	133.6	302.9	260.5
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	110.3	106.8	217.4	200.0
Engineered Systems \| United States
Disaggregation of Revenue [Line Items]
Net sales	108.7	106.0	215.0	198.8
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	0.9	0.3	1.2	0.4
Engineered Systems \| All Other
Disaggregation of Revenue [Line Items]
Net sales	0.7	0.5	1.2	0.8
Engineered Systems \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	91.4	95.7	184.0	175.5
Engineered Systems \| Other
Disaggregation of Revenue [Line Items]
Net sales	$ 18.9	$ 11.1	$ 33.4	$ 24.5