v3.25.4
Benefit Plans and Other Postretirement Benefits, Benefit obligation and plan assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amounts recognized in the balance sheet as of December 31:      
Accrued pension and postretirement benefit obligations $ 138.2 $ 129.8  
Accumulated other comprehensive (loss) income, net $ (479.5) $ (716.3)  
UNITED STATES      
Weighted average assumptions used to determine projected benefit obligations:      
Rate of compensation increase (as a percent) 2.40% 2.40%  
Foreign Plan      
Weighted average assumptions used to determine projected benefit obligations:      
Rate of compensation increase (as a percent) 1.89% 1.91%  
Pension Plan      
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year $ 495.4 $ 561.8  
Service cost 3.1 3.7 $ 3.8
Interest cost 23.4 24.1 25.4
Plan amendments 2.0 0.2  
Actuarial (gain) loss (9.6) (32.1)  
Foreign exchange translation and other 15.2 (8.8)  
Benefits paid (36.3) (53.5)  
Projected benefit obligation at end of year 493.2 495.4 561.8
Change in plan assets:      
Fair value of plan assets at the beginning of the year 444.5 481.6  
Actual return on plan assets 37.5 15.7  
Employer contributions 4.8 4.9 5.4
Foreign exchange translation and other 6.5 (4.2)  
Benefits paid (36.3) (53.5)  
Fair value of plan assets at end of year 457.0 444.5 481.6
Over (under) funded status at end of year (36.2) (50.9)  
Amounts recognized in the balance sheet as of December 31:      
Other long-term assets 48.1 34.8  
Other accrued expenses 4.3 3.9  
Accrued pension and postretirement benefit obligations 80.0 81.8  
Accumulated other comprehensive (loss) income, net (88.2) (106.4)  
Accumulated benefit obligation      
Accumulated benefit obligation 491.4 492.5  
Pension Plan | UNITED STATES      
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year 341.4 388.5  
Service cost 1.8 2.2 2.5
Interest cost 17.0 17.8 18.6
Plan amendments 2.0 0.2  
Actuarial (gain) loss 3.6 (20.8)  
Foreign exchange translation and other 0.0 0.0  
Benefits paid (28.3) (46.5)  
Projected benefit obligation at end of year 337.5 341.4 388.5
Change in plan assets:      
Fair value of plan assets at the beginning of the year 359.1 395.6  
Actual return on plan assets 32.8 8.9  
Employer contributions 1.1 1.1  
Foreign exchange translation and other 0.0 0.0  
Benefits paid (28.3) (46.5)  
Fair value of plan assets at end of year 364.7 359.1 395.6
Over (under) funded status at end of year 27.2 17.7  
Amounts recognized in the balance sheet as of December 31:      
Other long-term assets 40.5 31.2  
Other accrued expenses 1.2 1.2  
Accrued pension and postretirement benefit obligations 12.1 12.3  
Accumulated other comprehensive (loss) income, net $ (89.4) $ (96.8)  
Weighted average assumptions used to determine projected benefit obligations:      
Benefit obligation discount rate (as a percent) 5.28% 5.53%  
Increase (decrease) in benefit obligation due to change in discount rate $ (7.0)    
Accumulated benefit obligation      
Accumulated benefit obligation 337.4 $ 341.3  
Pension Plan | Foreign Plan      
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year 154.0 173.3  
Service cost 1.3 1.5 1.3
Interest cost 6.4 6.3 6.8
Plan amendments 0.0 0.0  
Actuarial (gain) loss (13.2) (11.3)  
Foreign exchange translation and other 15.2 (8.8)  
Benefits paid (8.0) (7.0)  
Projected benefit obligation at end of year 155.7 154.0 173.3
Change in plan assets:      
Fair value of plan assets at the beginning of the year 85.4 86.0  
Actual return on plan assets 4.7 6.8  
Employer contributions 3.7 3.8  
Foreign exchange translation and other 6.5 (4.2)  
Benefits paid (8.0) (7.0)  
Fair value of plan assets at end of year 92.3 85.4 $ 86.0
Over (under) funded status at end of year (63.4) (68.6)  
Amounts recognized in the balance sheet as of December 31:      
Other long-term assets 7.6 3.6  
Other accrued expenses 3.1 2.7  
Accrued pension and postretirement benefit obligations 67.9 69.5  
Accumulated other comprehensive (loss) income, net $ 1.2 $ (9.6)  
Weighted average assumptions used to determine projected benefit obligations:      
Benefit obligation discount rate (as a percent) 4.60% 4.13%  
Accumulated benefit obligation      
Accumulated benefit obligation $ 154.0 $ 151.2  
Largest foreign pension plan | Pension Plan | Foreign Plan      
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year 72.2    
Projected benefit obligation at end of year $ 70.9 $ 72.2  
Accumulated benefit obligation      
Funding status [Extensible Enumeration] us-gaap:UnfundedPlanMember us-gaap:UnfundedPlanMember