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Postretirement and Other Benefits (Details) - Pension Benefits - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
U.S. Pension Benefits    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost $ 0.0 $ 0.0
Interest cost 0.8 0.7
Expected return on plan assets (1.0) (1.0)
Amortizations and other 0.4 0.9
Net periodic benefit cost 0.2 0.6
French Pension Benefits    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost 0.4 0.3
Interest cost 0.1 0.0
Expected return on plan assets 0.0 0.0
Amortizations and other 0.1 0.3
Net periodic benefit cost 0.6 0.6
UK Pension Benefits    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost 0.0 0.0
Interest cost 0.5 0.0
Expected return on plan assets (0.6) 0.0
Amortizations and other 0.0 0.0
Net periodic benefit cost $ (0.1) $ 0.0