Risk Management and Fair Values (Schedules Of Concentration Of Risk, By Risk Factor ) (Details)	12 Months Ended
	Dec. 31, 2012
Power Price Risk [Member]
Concentration risk, type of risk	Power price risk
Concentration risk, affected business	Utility, Entergy Wholesale Commodities
Fuel Price Risk [Member]
Concentration risk, type of risk	Fuel price risk
Concentration risk, affected business	Utility, Entergy Wholesale Commodities
Equity Price And Interest Rate Risk - Investments [Member]
Concentration risk, type of risk	Equity price and interest rate risk - investments
Concentration risk, affected business	Utility, Entergy Wholesale Commodities