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Employee Benefit Plans - Components of the Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]      
Document Fiscal Year Focus 2018    
Components of Net Periodic Benefit Cost [Abstract]      
Defined Benefit Plan, Other Cost (Credit)   $ 0.3 $ 0.2
Foreign Plan [Member]      
Components of Net Periodic Benefit Cost [Abstract]      
Service cost $ 0.4 0.3 0.2
Interest cost 1.3 1.5 1.6
Expected return on plan assets (2.8) (2.7) (2.4)
Amortization of recognized actuarial loss 0.5 0.5 0.3
Defined Benefit Plan, Other Cost (Credit) 1.3 0.0 0.0
Total net periodic benefit income $ 0.7 $ (0.4) $ (0.3)