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Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Employer contributions $ 1.3 $ 2.0
Other Postretirement Benefit Plan    
Defined Benefit Plan Disclosure [Line Items]    
Employer contributions $ 10.7 $ 11.2