Regulatory Assets And Liabilities (Schedule Of Regulatory Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets	$ 94,274	$ 37,249
Regulatory liabilities	142,101	161,953
Deferred Energy [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory Assets included in Current Assets		83,836
Regulatory Liabilities included in Current Liabilities	30,702
North Anna Nuclear Decommissioning Trust Unrealized Gain [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory liabilities	73,682	44,357
North Anna Asset Retirement Obligation Deferral [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory liabilities	68,419	68,803
Unamortized Gains On Reacquired Debt [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory liabilities		54
Interest Rate Hedge [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets	1,325	1,461
Deferred Net Unrealized Losses On Derivative Instruments [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets	79,991
Deferred Net Unrealized Gains On Derivative Instruments [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory liabilities		48,739
Unamortized Losses On Reacquired Debt [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets	527	787
Deferred Asset Retirement Costs [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets	197	214
NOVEC Contract Termination Fee [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets	$ 12,234	14,681
PJM Capacity Performance Event [Member]
Schedule Of Regulatory Assets And Liabilities [Line Items]
Regulatory assets		$ 20,106