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Postretirement and Other Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Domestic Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Amortization of accumulated other comprehensive loss related to benefit plans $ 3.7   $ 3.7  
Domestic Plan | Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 0.0 $ 0.0 0.0 $ 0.0
Interest cost 1.1 1.2 2.2 2.4
Expected return on plan assets (1.4) (1.6) (2.9) (3.2)
Amortizations and other 0.8 0.9 1.7 1.8
Net periodic benefit cost 0.5 0.5 1.0 1.0
Domestic Plan | Other Postretirement Benefits Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 0.0 0.0 0.0 0.0
Interest cost 0.0 0.0 0.0 0.0
Expected return on plan assets 0.0 0.0 0.0 0.0
Amortizations and other 0.0 0.0 0.1 0.1
Net periodic benefit cost 0.0 0.0 0.1 0.1
FRANCE        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Amortization of accumulated other comprehensive loss related to benefit plans 0.8   0.8  
FRANCE | Pension Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 0.3 0.3 0.6 0.5
Interest cost 0.1 0.1 0.2 0.2
Expected return on plan assets (0.1) (0.1) (0.1) (0.1)
Amortizations and other 0.2 0.3 0.4 0.6
Net periodic benefit cost $ 0.5 $ 0.6 $ 1.1 $ 1.2