Retirement, Other Postretirement Benefits, And Defined Contribution Plans Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Reclassification Out of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 20,294	$ 10,556
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		315
Amortization of loss	(35,836)	(68,130)
Settlement loss	(3,643)	(11,612)
Total	(19,185)	(68,871)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(1,559)	(1,866)
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		(1,304)
Amortization of loss	(26,934)	(43,971)
Settlement loss	0	0
Total	(28,493)	(47,141)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	22,280	12,925
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		1,797
Amortization of loss	(6,689)	(21,590)
Settlement loss	0	0
Total	15,591	(6,868)
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(427)	(503)
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		(178)
Amortization of loss	(2,213)	(2,569)
Settlement loss	(3,643)	(11,612)
Total	(6,283)	(14,862)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	3,377	508
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		41
Amortization of loss	(1,511)	(5,050)
Total	1,866	(4,501)
Entergy Louisiana [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		0
Amortization of loss	0	0
Total	0	0
Entergy Louisiana [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	3,377	508
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		41
Amortization of loss	(1,511)	(5,050)
Total	1,866	(4,501)
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		0
Amortization of loss	0	0
Total	0	0
Entergy Gulf States Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	2,237	941
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		91
Amortization of loss	(3,126)	(7,644)
Total	(889)	(6,612)
Entergy Gulf States Louisiana [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost		(1)
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		0
Amortization of loss	(1,911)	(3,039)
Total	(1,911)	(3,040)
Entergy Gulf States Louisiana [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	2,237	942
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		91
Amortization of loss	(1,212)	(4,598)
Total	1,025	(3,565)
Entergy Gulf States Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Acceleration of Prior Service Cost Due to Curtailment, Before Tax		0
Amortization of loss	(3)	(7)
Total	$ (3)	$ (7)