Summary Of Significant Accounting Policies (Schedule Of Rate Changes Implemented To Address Under- And Over-Collection Of Energy Costs) (Details)	Jan. 01, 2023	Jul. 01, 2022	May 01, 2022	Jan. 01, 2022	Jan. 01, 2021	Jan. 01, 2020
Significant Accounting Policies [Line Items]
Percentage of total energy rate change		47.70%	6.70%	20.30%	(15.90%)	(16.20%)
Subsequent Event [Member]
Significant Accounting Policies [Line Items]
Percentage of total energy rate change	(1.50%)