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
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Dec. 31, 2018
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Sales	$ 0.4	$ 254.2	$ 6.1	$ 502.7
Cost of sales	(0.3)	(146.1)	(6.1)	(290.1)
Selling, general and administrative expenses	(0.5)	(40.9)	(0.5)	(76.1)
Research and development expenses	0.0	(9.2)	0.0	(18.2)
Gain (loss) on disposition of discontinued operations before income taxes	(0.3)	0.0	0.2	0.0
Interest expense and other	0.0	(1.4)	0.0	(2.7)
Earnings before income taxes	(0.7)	56.6	(0.3)	115.6
Income taxes	0.0	(11.8)	0.0	(23.6)
Net earnings from discontinued operations	(0.7)	$ 44.8	(0.3)	$ 92.0
ASSETS
Trade accounts receivable, net	0.3		0.3		$ 4.2
Inventories	0.0		0.0		4.4
Other current assets	21.1		21.1		21.4
Total current assets, discontinued operations	21.4		21.4		30.0
Current liabilities:
Trade accounts payable	5.2		5.2		9.2
Accrued expenses and other current liabilities	11.9		11.9		21.5
Total current liabilities, discontinued operations	$ 17.1		$ 17.1		$ 30.7