Revenue Recognition and Contract Balances - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2026	Sep. 28, 2025	Sep. 27, 2026	Sep. 28, 2025
Disaggregation of Revenue [Line Items]
Net sales	$ 1,684.9	$ 1,539.5	$ 4,907.5	$ 4,503.1
United States
Disaggregation of Revenue [Line Items]
Net sales	929.1	815.3	2,592.0	2,352.1
Europe
Disaggregation of Revenue [Line Items]
Net sales	391.2	373.9	1,251.8	1,107.5
Asia
Disaggregation of Revenue [Line Items]
Net sales	233.5	229.2	666.4	668.8
All Other
Disaggregation of Revenue [Line Items]
Net sales	131.1	121.1	397.3	374.7
U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	501.7	397.0	1,328.7	1,148.3
Other
Disaggregation of Revenue [Line Items]
Net sales	1,183.2	1,142.5	3,578.8	3,354.8
Digital Imaging
Disaggregation of Revenue [Line Items]
Net sales	903.0	785.4	2,588.6	2,313.4
Digital Imaging \| United States
Disaggregation of Revenue [Line Items]
Net sales	468.9	372.5	1,282.2	1,070.2
Digital Imaging \| Europe
Disaggregation of Revenue [Line Items]
Net sales	217.8	198.9	686.6	600.0
Digital Imaging \| Asia
Disaggregation of Revenue [Line Items]
Net sales	139.9	137.9	399.7	412.7
Digital Imaging \| All Other
Disaggregation of Revenue [Line Items]
Net sales	76.4	76.1	220.1	230.5
Digital Imaging \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	246.8	173.5	617.8	476.5
Digital Imaging \| Other
Disaggregation of Revenue [Line Items]
Net sales	656.2	611.9	1,970.8	1,836.9
Instrumentation
Disaggregation of Revenue [Line Items]
Net sales	370.5	363.6	1,119.7	1,074.5
Instrumentation \| United States
Disaggregation of Revenue [Line Items]
Net sales	164.4	159.5	458.1	458.4
Instrumentation \| Europe
Disaggregation of Revenue [Line Items]
Net sales	98.3	103.3	339.8	319.7
Instrumentation \| Asia
Disaggregation of Revenue [Line Items]
Net sales	68.2	66.7	193.0	184.6
Instrumentation \| All Other
Disaggregation of Revenue [Line Items]
Net sales	39.6	34.1	128.8	111.8
Instrumentation \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	42.0	37.4	107.6	97.3
Instrumentation \| Other
Disaggregation of Revenue [Line Items]
Net sales	328.5	326.2	1,012.1	977.2
Aerospace and Defense Electronics
Disaggregation of Revenue [Line Items]
Net sales	287.4	275.5	851.3	782.8
Aerospace and Defense Electronics \| United States
Disaggregation of Revenue [Line Items]
Net sales	173.8	169.8	508.1	495.0
Aerospace and Defense Electronics \| Europe
Disaggregation of Revenue [Line Items]
Net sales	75.1	71.7	225.4	187.8
Aerospace and Defense Electronics \| Asia
Disaggregation of Revenue [Line Items]
Net sales	23.9	24.0	71.4	69.7
Aerospace and Defense Electronics \| All Other
Disaggregation of Revenue [Line Items]
Net sales	14.6	10.0	46.4	30.3
Aerospace and Defense Electronics \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	105.9	88.9	304.2	293.3
Aerospace and Defense Electronics \| Other
Disaggregation of Revenue [Line Items]
Net sales	181.5	186.6	547.1	489.5
Engineered Systems
Disaggregation of Revenue [Line Items]
Net sales	124.0	115.0	347.9	332.4
Engineered Systems \| United States
Disaggregation of Revenue [Line Items]
Net sales	122.0	113.5	343.6	328.5
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	1.5	0.6	2.3	1.8
Engineered Systems \| All Other
Disaggregation of Revenue [Line Items]
Net sales	0.5	0.9	2.0	2.1
Engineered Systems \| U.S. Govt.
Disaggregation of Revenue [Line Items]
Net sales	107.0	97.2	299.1	281.2
Engineered Systems \| Other
Disaggregation of Revenue [Line Items]
Net sales	$ 17.0	$ 17.8	$ 48.8	$ 51.2