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Acquisitions - Pro Forma Information (Details) - DuPont - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Business Acquisition [Line Items]    
Pro forma Revenue $ 1,210.7 $ 1,043.0
Pro forma Diluted earnings per share from continuing operations (in USD per share) $ 1.91 $ 1.39