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Pension Plans (Summary of Estimated Benefit Payments) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [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
Qualified Plan [Member]        
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [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  
2026 $ 35.2      
2027 34.3      
2028 32.4      
2029 31.0      
2030 29.1      
2031-2035 $ 121.8      
Nonqualified Plan [Member]        
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [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  
2026 $ 2.6      
2027 2.5      
2028 2.4      
2029 2.3      
2030 2.1      
2031-2035 $ 8.7