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Pension And Other Postretirement Benefits (Narrative) (Details)
$ in Millions
9 Months Ended
Sep. 30, 2023
USD ($)
Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
Employer contributions $ 2.6
Other Postretirement Benefit Plan  
Defined Benefit Plan Disclosure [Line Items]  
Employer contributions $ 16.7