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Retirement Benefits - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
employee
shares
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Accumulated benefit obligation for all defined benefit pension plans $ 91.6 $ 89.4  
Percentage of excess gains and losses over benefit obligation or market value of assets amortized 10.00%    
Weighted average annual rate of increase in the per capita cost of covered health care benefits assumed 7.87%    
Assumed decrease of weighted average health care cost trend rate 4.00%    
Year that reaches assumed decrease of weighted average health care cost trend rate 2050    
Costs of defined contribution plans $ 17.8 17.4 $ 16.8
Number of participants covering under multi employer pension plan | employee 216    
Costs of bargaining unit-sponsored multi-employer plans and defined contribution plans $ 1.0 1.0 $ 0.9
Stock held in plan assets (in shares) | shares 0    
Defined Contribution Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan, expected contribution for next fiscal year $ 19.1    
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, expected contribution for next fiscal year 4.6    
Other Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Actuarial loss (gain) (0.3) 0.7  
Defined benefit plan, expected contribution for next fiscal year 1.0    
U.S. | Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Actuarial loss (gain) (0.3) 0.3  
Non-U.S. | Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Actuarial loss (gain) $ 5.4 $ (0.3)  
Equity securities | U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation of fund assets in equities 10.00%    
Equity securities | UK      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation of fund assets in equities 100.00%    
Fixed income securities | U.S. | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation of fund assets in equities 90.00%