Discontinued Operations - Components Comprising Net Income (Loss) from Discontinued Operations, Net (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
Income from discontinued operations, net of tax	$ 0.2	$ 27.4
Arysta | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Net sales	0.0	65.3
Cost of sales	0.0	(45.5)
Selling, technical, general and administrative	0.0	(36.6)
Research and development	0.0	(4.6)
Gain on Arysta Sale	0.0	21.3
Operating loss	0.0	(0.1)
Other, net	(0.7)	9.3
(Loss) income from discontinued operations, before income taxes	(0.7)	9.2
Income tax benefit	0.9	18.2
Income from discontinued operations, net of tax	0.2	27.4
Net income from discontinued operations attributable to the non-controlling interests	0.0	(0.1)
Net income from discontinued operations attributable to common stockholders	$ 0.2	$ 27.3