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Background and Basis of Presentation (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 31, 2019 USD ($)	Dec. 31, 2019 segment	Dec. 31, 2017 USD ($)	Jan. 31, 2014 $ / shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Par value (in usd per share) \| $ / shares				$ 0.01
Number of reportable segments \| segment		2
Continuing Operations \| Income Taxes
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Quantifying misstatement			$ 6.6
Discontinued Operations \| Income Taxes
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Quantifying misstatement			$ 2.7
Senior Notes \| USD Senior Notes Due 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Stated interest rate		5.875%
Agricultural Solutions Business \| Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Proceeds from the sale of business	$ 4,280.0