Discontinued Operations - Key Components of Income and Major Classes of Assets and Liabilities from Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Dec. 31, 2018
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Sales	$ 5.7	$ 248.5
Cost of sales	(5.8)	(144.0)
Selling, general and administrative expenses	0.0	(35.2)
Research and development expenses	0.0	(9.0)
Gain on disposition of discontinued operations before income taxes	0.5	0.0
Interest expense and other	0.0	(1.3)
Earnings before income taxes	0.4	59.0
Income taxes	0.0	(11.8)
Net earnings	0.4	$ 47.2
ASSETS
Trade accounts receivable, net	5.1		$ 4.2
Inventories	0.0		4.4
Other current assets	21.2		21.4
Total current assets, discontinued operations	26.3		30.0
Current liabilities:
Trade accounts payable	5.4		9.2
Accrued expenses and other current liabilities	17.3		21.5
Total current liabilities, discontinued operations	$ 22.7		$ 30.7