v3.25.4
Retirement Benefit Plans - Change in Benefit Obligation and Plan Assets and Funded Status - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Assets for Plan Benefits, Defined Benefit Plan   $ 14.2  
United States [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at beginning of year $ 43.8 48.3  
Service cost 0.0 0.0  
Interest cost 2.2 2.3 $ 2.5
Actuarial (gain) loss 0.2 (1.6)  
Benefits paid, benefit obligation 5.9 5.2  
Employee contributions, benefit obligation 0.0 0.0  
Foreign currency exchange rate changes 0.0 0.0  
Projected benefit obligation at end of year 40.3 43.8 48.3
Accumulated benefit obligation at end of year 40.3 43.8  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 44.9 47.9  
Actual return on plan assets 4.0 2.2  
Employer contributions 0.0 0.0  
Employee contributions, plan assets 0.0 0.0  
Benefits paid, plan assets 5.9 5.2  
Foreign currency exchange rate changes, plan assets 0.0 0.0  
Fair value of plan assets at end of year 43.0 44.9 47.9
Funded status at end of year 2.7 1.1  
Assets for Plan Benefits, Defined Benefit Plan 2.7 1.1  
Noncurrent liabilities 0.0 0.0  
Assets for Plan Benefits, Defined Benefit Plan 2.7 1.1  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]      
Actuarial loss (22.4) (25.9)  
Prior service credit 0.0 0.0  
Deferred taxes (8.3) (8.3)  
Foreign currency translation adjustment 0.0 0.0  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax 14.1 17.6  
Foreign Plan [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at beginning of year 112.0 126.0  
Service cost 0.1 0.1 0.0
Interest cost 5.8 5.3 5.4
Actuarial (gain) loss (3.5) (10.4)  
Benefits paid, benefit obligation 7.4 7.0  
Employee contributions, benefit obligation 0.1 0.1  
Foreign currency exchange rate changes 8.4 (2.1)  
Projected benefit obligation at end of year 115.5 112.0 126.0
Accumulated benefit obligation at end of year 114.2 110.6  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 126.2 139.0  
Actual return on plan assets 1.8 (4.0)  
Employer contributions 0.2 0.2  
Employee contributions, plan assets 0.1 0.1  
Benefits paid, plan assets 7.4 7.0  
Foreign currency exchange rate changes, plan assets 9.4 (2.1)  
Fair value of plan assets at end of year 130.3 126.2 $ 139.0
Funded status at end of year 14.8 14.2  
Assets for Plan Benefits, Defined Benefit Plan 16.5 14.1  
Noncurrent liabilities (1.7) 0.1  
Assets for Plan Benefits, Defined Benefit Plan 14.8    
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]      
Actuarial loss (53.2) (54.7)  
Prior service credit 1.3 1.3  
Deferred taxes (13.0) (13.3)  
Foreign currency translation adjustment 2.4 2.8  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax $ 43.9 $ 45.5