Risk Management and Fair Values (Schedules Of Concentration Of Risk, By Risk Factor ) (Details) (Imported) (Imported)	6 Months Ended
	Jun. 30, 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