v3.25.4
Retirement Benefit Plans - Fair Value - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year $ 0.0 $ 9.1  
Defined Benefit Plan, Equity Securities, US [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 0.0 0.0  
Defined Benefit Plan, Equity Securities, Non-US Non-UK [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 0.0 4.0  
Defined Benefit Plan, Equity Securities, Non-US Non-UK [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 0.0 0.0  
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 42.6 31.3  
Fixed Income Funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 13.4 113.9  
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 0.4 0.5  
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 5.3 12.3  
Insurance, Other | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 0.0 0.0  
Insurance, Other | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at end of year 111.6 0.0  
United States [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 43.0 44.9 $ 47.9
United States [Member] | Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 43.0 44.9  
United States [Member] | Defined Benefit Plan, Equity Securities, US [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%    
United States [Member] | Fixed Income Funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 100.00%    
United States [Member] | Money Market Funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%    
Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 130.3 126.2 $ 139.0
Foreign Plan [Member] | Fair Value, Inputs, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 130.3 $ 126.2  
Foreign Plan [Member] | Fixed Income Funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 2.00%    
Foreign Plan [Member] | Money Market Funds [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 0.00%    
Foreign Plan [Member] | Insurance, Other      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 98.00%