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Background and Basis of Presentation (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2018
segment
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jan. 31, 2019
USD ($)
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          
Senior Notes | USD Senior Notes Due 2025            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Stated interest rate 5.875%          
Continuing Operations | Income Taxes            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Quantifying misstatement   $ (6.6) $ 6.6      
Discontinued Operations | Foreign Subsidiary Tax Accounting            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Quantifying misstatement     9.3 $ 9.5    
Discontinued Operations | Income Taxes            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Quantifying misstatement   $ (2.7) 2.7      
Discontinued Operations | Incorrect Allocation of Expenses to Non-controlling Interest            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Quantifying misstatement     $ 6.1      
Subsequent Event | Senior Notes | USD Senior Notes Due 2025            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Stated interest rate         5.875%  
Subsequent Event | Agricultural Solutions Business | Disposed of by Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Percent of issued and outstanding common stock         100.00%  
Disposal group consideration         $ 4,200.0