Discontinued Operations - Components Comprising Net Income (Loss) from Discontinued Operations, Net (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
(Loss) income from discontinued operations, net of tax	$ (1.1)	$ (13.3)	$ (0.9)	$ 14.1
Arysta | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Net sales	0.0	0.0	0.0	65.3
Cost of sales	0.0	0.0	0.0	(45.5)
Selling, technical, general and administrative	0.0	(0.8)	0.0	(37.4)
Research and development	0.0	0.0	0.0	(4.6)
(Loss) gain on Arysta Sale	0.0	(18.8)	0.0	2.5
Operating loss	0.0	(19.6)	0.0	(19.7)
Other, net	(0.8)	(0.6)	(1.5)	8.7
Loss from discontinued operations, before income taxes	(0.8)	(20.2)	(1.5)	(11.0)
Income tax (expense) benefit	(0.3)	6.9	0.6	25.1
(Loss) income from discontinued operations, net of tax	(1.1)	(13.3)	(0.9)	14.1
Net loss from discontinued operations attributable to the non-controlling interests	0.0	0.1	0.0	0.0
Net (loss) income from discontinued operations attributable to common stockholders	$ (1.1)	$ (13.2)	$ (0.9)	$ 14.1