Discontinued Operations - Results of Discontinued Operations (Details) - Discontinued Operations, Disposed of by Sale - RX - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2021	Mar. 28, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 200.1	$ 257.7
Cost of sales	138.3	165.8
Gross profit	61.8	91.9
Distribution	3.3	4.0
Research and development	13.4	13.6
Selling	7.4	7.3
Administration	18.2	6.5
Other operating expense (income)	(0.9)	1.1
Total operating expenses	41.4	32.5
Operating income	20.4	59.4
Interest expense, net	0.6	1.4
Other (income) expense, net	(1.5)	0.7
Income before income taxes	21.3	57.3
Income tax expense (benefit)	(14.0)	8.5
Income from discontinued operations, net of tax	$ 35.3	$ 48.8