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Employee Benefit Plans (Schedule Of Target Asset Allocations) (Details)
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Plan Asset Allocations 100.00% 100.00%
Cash And Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Plan Asset Allocations 16.60%  
Domestic equities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Plan Asset Allocations 25.10% 35.70%
Fixed Income Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Plan Asset Allocations 21.70% 35.00%
Other Investments [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Target Plan Asset Allocations 36.60% 29.30%