Discontinued Operations - Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) income from discontinued operations, net of income taxes	$ (0.3)	$ 6.8
Darex | Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	0.0	0.0
Cost of goods sold	0.0	0.0
Gross profit	0.0	0.0
Selling, general and administrative expenses	0.2	0.3
Restructuring expenses and asset impairments	0.0	0.1
Gain on sale of business	0.0	(9.6)
Other expenses, net	0.1	0.1
(Loss) income from discontinued operations before income taxes	(0.3)	9.1
Provision for income taxes	0.0	(2.3)
(Loss) income from discontinued operations, net of income taxes	$ (0.3)	$ 6.8