Risk Management and Fair Values (Schedules Of Valuation Techniques) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Effect of Significant Unobservable Inputs on Fair Value of Electricity Swaps	$ (4)	$ (4)
Entergy Arkansas [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	0.5	0.5	3.0	0
Issuance of Fixed Transmission Rights		4.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	2.4	13.0
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(4.9)	(16.7)
Entergy Gulf States Louisiana [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	26.8	26.8	47.2	6.7
Issuance of Fixed Transmission Rights		37.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(9.8)	28.5
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(10.6)	(45.7)
Entergy Louisiana [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	14.7	14.7	23.6	5.7
Issuance of Fixed Transmission Rights		21.5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	4.5	21.3
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(13.4)	(33.8)
Entergy Mississippi [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	6.1	6.1	12.7	1.0
Issuance of Fixed Transmission Rights		15.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(3.3)	5.5
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(3.3)	(15.6)
Entergy New Orleans [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	6.0	6.0	8.5	2.0
Issuance of Fixed Transmission Rights		8.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	2.6	7.1
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(5.1)	(11.4)
Entergy Texas [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	27.5	27.5	47.8	18.4
Issuance of Fixed Transmission Rights		33.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(10.5)	31.9
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(9.8)	(56.0)
Parent Company [Member]
Range From Average Percentage for Electricity Options	69.00%	69.00%
Range from Average Percentage for Fair Value of Electricity Swaps	3.00%	3.00%
Effect of Significant Unobservable Inputs on Fair Value of Electricity Options	30	30
Fair Value of Electricity Options	29	29
Fair Value of Electricity Swaps	$ (120)	$ (120)