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Pension And Other Post-Retirement Benefits (Narrative) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position $ 7.2   $ 7.3
Pension settlement loss   $ 92.3  
Other Post-Retirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Expected required contributions 0.4    
Accrued Expenses [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Liability, Defined Benefit Plan, Current $ 0.7