Risk Management and Fair Values (Schedules Of Valuation Techniques) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	$ 56.0	$ 83.0	$ 56.0	$ 83.0	$ (61.0)	$ (98.0)	$ 52.0	$ 178.0
Effect of Significant Unobservable Inputs on Fair Value of Electricity Swaps	(2)		(2)
Issuance of Fixed Transmission Rights	121.0	0	121.0	0
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	101.0	4.0	(94.0)	2.0
Entergy Arkansas [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	3.0		3.0		2.7	0
Issuance of Fixed Transmission Rights	4.2		4.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	2.8		10.6
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(6.7)		(11.8)
Entergy Gulf States [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	47.2		47.2		5.4	6.7
Issuance of Fixed Transmission Rights	37.3		37.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	30.6		38.3
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(26.1)		(35.1)
Entergy Louisiana [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	23.6		23.6		3.0	5.7
Issuance of Fixed Transmission Rights	21.5		21.5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	11.5		16.8
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(12.4)		(20.4)
Entergy Mississippi [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	12.7		12.7		4.8	1.0
Issuance of Fixed Transmission Rights	15.2		15.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(2.8)		8.8
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(4.5)		(12.3)
Entergy New Orleans [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	8.5		8.5		1.0	2.0
Issuance of Fixed Transmission Rights	8.3		8.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	2.5		4.5
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(3.3)		(6.3)
Entergy Texas [Member]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Value	47.8		47.8		7.4	18.4
Issuance of Fixed Transmission Rights	33.2		33.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	40.6		42.4
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases Sales Issuances Settlements	(33.4)		(46.2)
Parent Company [Member]
Range From Average Percentage for Electricity Options	101.00%		101.00%
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	28		28
Fair Value of Electricity Options	(17)		(17)
Fair Value of Electricity Swaps	$ (71)		$ (71)