Discontinued Operations - Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 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	$ 0.0	$ (0.5)	$ (0.3)	$ 6.3
Darex | Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		0.0	0.0	0.0
Cost of goods sold		0.0	0.0	0.0
Gross profit		0.0	0.0	0.0
Selling, general and administrative expenses		0.6	0.2	0.9
Restructuring expenses and asset impairments		0.1	0.0	0.2
Gain on sale of business		0.0	0.0	(9.6)
Other (income) expenses, net		(0.1)	0.1	0.0
(Loss) income from discontinued operations before income taxes		(0.6)	(0.3)	8.5
Benefit (provision) for income taxes		0.1	0.0	(2.2)
(Loss) income from discontinued operations, net of income taxes		$ (0.5)	$ (0.3)	$ 6.3