Commitments And Contingencies (Narrative) (Details) (Entergy Arkansas [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Commitments And Contingencies [Abstract]
Course Of Construction Sublimit	$ 50
Insurance Receivable	50
Capital Expense	41
Operation And Maintenance Expense Incurred For ANO Recovery	9
Operation And Maintenance Expense In Excess Of Insurance Receivable	14
Minimum [Member]
Commitments And Contingencies [Abstract]
Estimated Cost To Restore ANO To Service	95
Maximum [Member]
Commitments And Contingencies [Abstract]
Estimated Cost To Restore ANO To Service	$ 120