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Employee Benefit Plans - Fair Value of Plan Assets by Category (Details) - Foreign Pension Plan - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 43.8 $ 45.1 $ 45.9
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7.8 5.8  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 36.0 39.3  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
Fixed income investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 13.0 14.6  
Fixed income investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3.3 1.1  
Fixed income investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 9.7 13.5  
Fixed income investments | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
Common stock funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 18.7 22.7  
Common stock funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2.3 2.7  
Common stock funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 16.4 20.0  
Common stock funds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
Cash and equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3.5 1.1  
Cash and equivalents | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.6 0.3  
Cash and equivalents | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 2.9 0.8  
Cash and equivalents | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0.0 0.0  
Other      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8.6 6.7  
Other | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1.6 1.7  
Other | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 7.0 5.0  
Other | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0.0 $ 0.0