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Employee Benefit Plans - Accumulated Benefit Obligations in Excess of Plan Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Document Fiscal Year Focus 2016  
Foreign Pension Plan    
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]    
Projected benefit obligation $ 32.6 $ 31.3
Accumulated benefit obligation 31.9 30.3
Fair value of plan assets $ 24.2 $ 25.0