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Employee Benefit Plans - Accumulated Benefit Obligations in Excess of Plan Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Document Fiscal Year Focus 2018  
Foreign Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change $ 1.0  
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]    
Projected benefit obligation 31.2 $ 35.3
Accumulated benefit obligation 31.0 34.8
Fair value of plan assets $ 24.7 $ 28.8