(Schedule of Notional Amounts of Financial Instruments) (Details) - MWh	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Not Designated as Hedging Instrument [Member] | Energy Commodities and Service | Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure	200,000	500,000