Income Taxes - Components of Deferred Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Net operating losses	$ 224.5	$ 323.0
Arysta outside basis differences	274.2	0.0
Employee benefits	38.6	40.3
Tax credits	38.5	62.0
Financing activities	29.1	24.3
Accrued liabilities	26.4	25.9
Interest carryforward	17.3	44.4
Accounts receivable	16.0	19.1
Research and development costs	11.8	10.3
Goodwill	10.3	19.5
Inventory	4.7	4.6
Other	10.2	20.7
Total deferred tax assets	701.6	594.1
Valuation allowance	(475.2)	(391.7)
Total deferred tax assets	226.4	202.4
Deferred tax liabilities:
Intangibles	631.2	710.4
Plant and equipment	31.8	24.8
Undistributed foreign earnings	29.5	21.9
Other	0.4	0.4
Total deferred tax liabilities	692.9	757.5
Net deferred tax liability	$ 466.5	$ 555.1