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Acquisitions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Business Acquisition [Line Items]          
inventory step-up and backlog amortization $ 0.3   $ 8.8    
Business Combination, Integration Related Costs $ 2.1 $ 0.5 11.3 $ 3.1  
Goodwill, Acquired During Period     206.7   $ 31.5
Westlock [Member]          
Business Acquisition [Line Items]          
Payments to Acquire Businesses, Gross   40.0      
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period       $ 32.0  
Goodwill, Acquired During Period     $ 0.0   22.6
Microtronic [Member]          
Business Acquisition [Line Items]          
Payments to Acquire Businesses, Gross   $ 18.0      
Goodwill, Acquired During Period         $ 8.9