Discontinued Operations - Key Components of Income and Major Classes of Assets and Liabilities from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jun. 26, 2020	Jul. 02, 2021	Jun. 26, 2020	Dec. 31, 2020
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Sales	$ 0.0	$ 533.7	$ 0.0	$ 1,142.9
Cost of sales	0.0	(302.8)	0.0	(648.9)
Selling, general and administrative expenses	(1.3)	(112.6)	(3.2)	(253.6)
Research and development expenses	0.0	(30.2)	0.0	(63.1)
Goodwill impairment	0.0	0.0	0.0	(85.3)
Interest expense and other income, net	0.0	(7.1)	0.1	(12.3)
Earnings before income taxes	(1.3)	81.0	(3.1)	79.7
Income taxes	0.2	(10.8)	0.5	(22.4)
Net earnings from discontinued operations	(1.1)	$ 70.2	(2.6)	$ 57.3
ASSETS
Other current assets	0.0		0.0		$ 30.4
Total assets, discontinued operations	0.0		0.0		30.4
Current liabilities:
Accrued expenses and other current liabilities	(1.5)		(1.5)		(33.3)
Total liabilities, discontinued operations	$ (1.5)		$ (1.5)		$ (33.3)