v3.25.3
Retirement and Other Postretirement Benefit Plans - Schedule of Net Periodic Benefit Costs of Defined Benefit Retirement Plans (Details) - Defined Benefit Retirement Plans - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
U.S.          
Net periodic benefit costs of defined benefit retirement plans          
Service cost $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Interest cost 0.2 0.3 0.6 0.7  
Net amortization and deferral 0.0 (0.2) 0.0 (0.4)  
Net periodic benefit cost $ 0.2 $ 0.1 $ 0.6 $ 0.3  
Defined Benefit Plan, Tax Status [Extensible List] Non qualified Non qualified Non qualified Non qualified Non qualified
European          
Net periodic benefit costs of defined benefit retirement plans          
Service cost $ 0.1 $ 0.2 $ 0.4 $ 0.5  
Interest cost 0.2 0.1 0.4 0.4  
Expected return on plan assets (0.1) 0.0 (0.1) (0.1)  
Net amortization and deferral 0.1 0.0 0.2 0.1  
Net periodic benefit cost $ 0.3 $ 0.3 $ 0.9 $ 0.9