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Acquisitions (Details 3) - IP Cleaning S.p.A - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Apr. 06, 2017
Business Acquisition [Line Items]    
Business Acquisition, Percentage of Voting Interests Acquired   100.00%
Business Combination, Consideration Transferred $ 353.8  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents   $ 8.8
Long-term Line of Credit   $ 420.0