Business Segments - Net Sales and Operating Income by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Net sales:
Total net sales	$ 1,402.5	$ 1,363.6	$ 4,210.5	$ 4,040.4
Net sales, percentage change	2.90%		4.20%
Operating income:
Operating income	$ 264.3	245.2	$ 762.9	698.2
Total segment operating profit, percentage change	7.80%		9.30%
Net sales	$ (1,402.5)	(1,363.6)	$ (4,210.5)	(4,040.4)
Corporate expense
Operating income:
Operating income	$ (17.8)	(15.8)	$ (49.8)	(46.6)
Total segment operating profit, percentage change	12.70%		6.90%
Inter-segment sales
Net sales:
Total net sales	$ (7.2)	(4.8)	$ (21.5)	(15.4)
Operating income:
Net sales	7.2	4.8	21.5	15.4
Digital Imaging
Net sales:
Total net sales	775.8	777.9	2,341.6	2,304.2
Operating income:
Net sales	(775.8)	(777.9)	(2,341.6)	(2,304.2)
Digital Imaging | Operating segments
Net sales:
Total net sales	$ 775.8	777.9	$ 2,341.6	2,304.2
Net sales, percentage change	(0.30%)		1.60%
Operating income:
Operating income	$ 136.3	133.7	$ 383.1	367.3
Total segment operating profit, percentage change	1.90%		4.30%
Net sales	$ (775.8)	(777.9)	$ (2,341.6)	(2,304.2)
Instrumentation
Net sales:
Total net sales	329.1	306.4	991.0	927.8
Operating income:
Net sales	(329.1)	(306.4)	(991.0)	(927.8)
Instrumentation | Operating segments
Net sales:
Total net sales	$ 329.1	306.4	$ 991.0	927.8
Net sales, percentage change	7.40%		6.80%
Operating income:
Operating income	$ 85.5	71.1	$ 247.6	216.3
Total segment operating profit, percentage change	20.30%		14.50%
Net sales	$ (329.1)	(306.4)	$ (991.0)	(927.8)
Aerospace and Defense Electronics
Net sales:
Total net sales	183.3	169.5	542.5	504.5
Operating income:
Net sales	(183.3)	(169.5)	(542.5)	(504.5)
Aerospace and Defense Electronics | Operating segments
Net sales:
Total net sales	$ 183.3	169.5	$ 542.5	504.5
Net sales, percentage change	8.10%		7.50%
Operating income:
Operating income	$ 49.4	44.3	$ 149.6	131.3
Total segment operating profit, percentage change	11.50%		13.90%
Net sales	$ (183.3)	(169.5)	$ (542.5)	(504.5)
Engineered Systems
Net sales:
Total net sales	114.3	109.8	335.4	303.9
Operating income:
Net sales	(114.3)	(109.8)	(335.4)	(303.9)
Engineered Systems | Operating segments
Net sales:
Total net sales	$ 114.3	109.8	$ 335.4	303.9
Net sales, percentage change	4.10%		10.40%
Operating income:
Operating income	$ 10.9	11.9	$ 32.4	29.9
Total segment operating profit, percentage change	(8.40%)		8.40%
Net sales	$ (114.3)	$ (109.8)	$ (335.4)	$ (303.9)