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Fair Value Measurements (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign currency forward contracts $ 0.1    
Total financial assets 0.1    
Foreign currency forward contracts   $ 0.1  
Contingent consideration liabilities 0.3 1.9  
Total financial liabilities 0.3 2.0  
Asset impairments 0.0 1.2 $ 253.6
Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign currency forward contracts 0.1    
Total financial assets 0.1    
Foreign currency forward contracts   0.1  
Contingent consideration liabilities 0.0 0.0  
Total financial liabilities 0.0 0.1  
Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreign currency forward contracts 0.0    
Total financial assets 0.0    
Foreign currency forward contracts   0.0  
Contingent consideration liabilities 0.3 1.9  
Total financial liabilities $ 0.3 $ 1.9