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Acquisitions (Narrative) (Details)
$ in Millions
12 Months Ended
May 31, 2019
USD ($)
Oct. 01, 2018
USD ($)
Feb. 01, 2018
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
business
Dec. 31, 2017
USD ($)
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]            
Business acquisition, cash paid       $ 8.1 $ 46.9 $ 39.7
Erie Press Systems EP            
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]            
Purchase price $ 9.1     9.1    
Revenues       12.0    
Business acquisition, cash paid       8.1    
Cash acquired       10.4    
Contingent consideration, range of outcomes, high       1.0    
Contingent consideration liability       $ 1.0    
CDF            
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]            
Purchase price     $ 35.6      
Hydrapower Dynamics Limited            
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]            
Purchase price   $ 7.8        
Immaterial business acquisitions            
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]            
Purchase price         $ 3.5  
Number of acquisitions | business         2