Business Segments - Net Sales and Operating Income by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Net sales:
Total net sales	$ 1,424.7	$ 1,355.8	$ 2,808.0	$ 2,676.8
Net sales, percentage change	5.10%		4.90%
Operating income:
Operating income	$ 256.1	229.5	$ 498.6	453.0
Total segment operating profit, percentage change	11.60%		10.10%
Net sales	$ (1,424.7)	(1,355.8)	$ (2,808.0)	(2,676.8)
Corporate expense
Operating income:
Operating income	$ (14.6)	(14.7)	$ (32.0)	(30.8)
Total segment operating profit, percentage change	(0.70%)		3.90%
Inter-segment sales
Net sales:
Total net sales	$ (8.1)	(5.1)	$ (14.3)	(10.6)
Operating income:
Net sales	8.1	5.1	14.3	10.6
Digital Imaging
Net sales:
Total net sales	793.3	775.8	1,565.8	1,526.3
Operating income:
Net sales	(793.3)	(775.8)	(1,565.8)	(1,526.3)
Digital Imaging | Operating segments
Net sales:
Total net sales	$ 793.3	775.8	$ 1,565.8	1,526.3
Net sales, percentage change	2.30%		2.60%
Operating income:
Operating income	$ 124.6	117.9	$ 246.8	233.6
Total segment operating profit, percentage change	5.70%		5.70%
Net sales	$ (793.3)	(775.8)	$ (1,565.8)	(1,526.3)
Instrumentation
Net sales:
Total net sales	328.4	312.5	661.9	621.4
Operating income:
Net sales	(328.4)	(312.5)	(661.9)	(621.4)
Instrumentation | Operating segments
Net sales:
Total net sales	$ 328.4	312.5	$ 661.9	621.4
Net sales, percentage change	5.10%		6.50%
Operating income:
Operating income	$ 81.4	73.6	$ 162.1	145.2
Total segment operating profit, percentage change	10.60%		11.60%
Net sales	$ (328.4)	(312.5)	$ (661.9)	(621.4)
Aerospace and Defense Electronics
Net sales:
Total net sales	186.0	168.8	359.2	335.0
Operating income:
Net sales	(186.0)	(168.8)	(359.2)	(335.0)
Aerospace and Defense Electronics | Operating segments
Net sales:
Total net sales	$ 186.0	168.8	$ 359.2	335.0
Net sales, percentage change	10.20%		7.20%
Operating income:
Operating income	$ 53.2	44.1	$ 100.2	87.0
Total segment operating profit, percentage change	20.60%		15.20%
Net sales	$ (186.0)	(168.8)	$ (359.2)	(335.0)
Engineered Systems
Net sales:
Total net sales	117.0	98.7	221.1	194.1
Operating income:
Net sales	(117.0)	(98.7)	(221.1)	(194.1)
Engineered Systems | Operating segments
Net sales:
Total net sales	$ 117.0	98.7	$ 221.1	194.1
Net sales, percentage change	18.50%		13.90%
Operating income:
Operating income	$ 11.5	8.6	$ 21.5	18.0
Total segment operating profit, percentage change	33.70%		19.40%
Net sales	$ (117.0)	$ (98.7)	$ (221.1)	$ (194.1)