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Postretirement and Other Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
U.S. Pension Benefits [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 1.3 1.3 2.6 2.6
Expected return on plan assets (1.7) (1.7) (3.4) (3.5)
Amortizations and other 1.0 1.4 2.0 2.8
Net periodic benefit cost 0.6 1.0 1.2 1.9
Amortization of accumulated other comprehensive loss related to benefit plans     4.1  
French Pension Benefits [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 0.3 0.3 0.6 0.6
Interest cost 0.1 0.1 0.2 0.2
Expected return on plan assets 0.0 0.0 (0.1) (0.1)
Amortizations and other 0.2 0.3 0.5 0.6
Net periodic benefit cost 0.6 0.7 1.2 1.3
Amortization of accumulated other comprehensive loss related to benefit plans     1.0  
U.S. OPEB Benefits [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 (0.1) 0.1 (0.2)
Net periodic benefit cost $ 0.0 $ (0.1) $ 0.1 $ (0.2)