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Acquisitions (Narrative) (Details)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
May 31, 2019
USD ($)
Oct. 01, 2018
USD ($)
Feb. 01, 2018
USD ($)
Jul. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
business
Business Acquisition [Line Items]                
Business acquisitions, net of cash acquired         $ 7.6 $ 35.6    
Erie Press Systems (EP)                
Business Acquisition [Line Items]                
Purchase price $ 9.1              
Business acquisitions, net of cash acquired 7.6              
Cash acquired 10.4              
Contingent consideration, range of outcomes, high $ 1.0              
Contingent consideration         $ 1.0      
Canton Drop Forge                
Business Acquisition [Line Items]                
Purchase price     $ 35.6          
Hydrapower Dynamics Limited                
Business Acquisition [Line Items]                
Purchase price   $ 7.8            
Series of Individually Immaterial Business Acquisitions                
Business Acquisition [Line Items]                
Purchase price               $ 3.5
Number of businesses acquired | business               2
Subsequent Event | Erie Press Systems (EP)                
Business Acquisition [Line Items]                
Additional consideration transferred       $ 0.5        
Forecast | Erie Press Systems (EP)                
Business Acquisition [Line Items]                
Annual revenue of acquiree             $ 20.0