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Pension and Other Postretirement Benefits (Schedule Of Significant Actuarial Assumptions In Determining Funded Status Plan) (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Discount Rate 2.76% 2.38%
Rate of Compensation Increases 4.00% 4.00%
Interest Crediting Rates 4.00% 4.00%
Trend for Next Year 0.00% 0.00%
Ultimate Trend 0.00% 0.00%
Other Postretirement Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Discount Rate 2.85% 2.49%
Rate of Compensation Increases 0.00% 0.00%
Interest Crediting Rates 0.00% 0.00%
Trend for Next Year 6.20% 6.69%
Ultimate Trend 4.50% 4.50%
Year Ultimate Trend Reached 2030 2029