XML 95 R80.htm IDEA: XBRL DOCUMENT v3.25.4
Pension Plans (Summary of Plan Assets Investment Measured At Fair Value) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Defined Benefit Plan, Type [Extensible List] us-gaap:PensionPlansDefinedBenefitMember us-gaap:PensionPlansDefinedBenefitMember us-gaap:PensionPlansDefinedBenefitMember  
Defined Benefit Plan, Sponsor Location [Extensible List] us-gaap:DomesticPlanMember us-gaap:DomesticPlanMember us-gaap:DomesticPlanMember us-gaap:DomesticPlanMember
Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value $ 51.9 $ 56.4    
Fixed Maturities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 8.7 10.8 $ 12.3  
Fixed Maturities [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 45.0 50.0    
Money Market Funds [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 6.9 6.4    
Level 1 [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 43.2 45.6    
Level 1 [Member] | Fixed Maturities [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 36.3 39.2    
Level 1 [Member] | Money Market Funds [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 6.9 6.4    
Level 3 [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value 8.7 10.8    
Level 3 [Member] | Fixed Maturities [Member] | Estimated Fair Value [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Invested assets, fair value $ 8.7 $ 10.8