Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Estimated Future Benefit Payments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	$ 455
Estimated Future Medicare Subsidy Receipts, Year Two	525
Estimated Future Medicare Subsidy Receipts, Year Three	595
Estimated Future Medicare Subsidy Receipts, Year Four	1,785
Estimated Future Medicare Subsidy Receipts, Year Five	1,984
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	13,539
Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	262,792
Estimated Future Benefits Payments, Year Two	277,307
Estimated Future Benefits Payments, Year Three	292,841
Estimated Future Benefits Payments, Year Four	310,200
Estimated Future Benefits Payments, Year Five	328,533
Estimated Future Benefits Payments, Year Six - Year Ten	1,966,776
Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	16,173
Estimated Future Benefits Payments, Year Two	9,976
Estimated Future Benefits Payments, Year Three	10,774
Estimated Future Benefits Payments, Year Four	12,598
Estimated Future Benefits Payments, Year Five	11,431
Estimated Future Benefits Payments, Year Six - Year Ten	70,791
Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	78,601
Estimated Future Benefits Payments, Year Two	80,601
Estimated Future Benefits Payments, Year Three	83,425
Estimated Future Benefits Payments, Year Four	88,049
Estimated Future Benefits Payments, Year Five	92,253
Estimated Future Benefits Payments, Year Six - Year Ten	506,086
Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	77
Estimated Future Medicare Subsidy Receipts, Year Two	87
Estimated Future Medicare Subsidy Receipts, Year Three	96
Estimated Future Medicare Subsidy Receipts, Year Four	358
Estimated Future Medicare Subsidy Receipts, Year Five	398
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	2,593
Entergy Arkansas [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	66,156
Estimated Future Benefits Payments, Year Two	67,639
Estimated Future Benefits Payments, Year Three	69,207
Estimated Future Benefits Payments, Year Four	71,306
Estimated Future Benefits Payments, Year Five	73,795
Estimated Future Benefits Payments, Year Six - Year Ten	418,009
Entergy Arkansas [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	347
Estimated Future Benefits Payments, Year Two	300
Estimated Future Benefits Payments, Year Three	291
Estimated Future Benefits Payments, Year Four	282
Estimated Future Benefits Payments, Year Five	339
Estimated Future Benefits Payments, Year Six - Year Ten	2,684
Entergy Arkansas [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	15,699
Estimated Future Benefits Payments, Year Two	15,745
Estimated Future Benefits Payments, Year Three	15,830
Estimated Future Benefits Payments, Year Four	16,305
Estimated Future Benefits Payments, Year Five	16,528
Estimated Future Benefits Payments, Year Six - Year Ten	86,854
Entergy Gulf States Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	37
Estimated Future Medicare Subsidy Receipts, Year Two	41
Estimated Future Medicare Subsidy Receipts, Year Three	46
Estimated Future Medicare Subsidy Receipts, Year Four	168
Estimated Future Medicare Subsidy Receipts, Year Five	184
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	1,243
Entergy Gulf States Louisiana [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	25,450
Estimated Future Benefits Payments, Year Two	26,805
Estimated Future Benefits Payments, Year Three	28,340
Estimated Future Benefits Payments, Year Four	30,279
Estimated Future Benefits Payments, Year Five	32,445
Estimated Future Benefits Payments, Year Six - Year Ten	196,323
Entergy Gulf States Louisiana [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	241
Estimated Future Benefits Payments, Year Two	228
Estimated Future Benefits Payments, Year Three	241
Estimated Future Benefits Payments, Year Four	205
Estimated Future Benefits Payments, Year Five	199
Estimated Future Benefits Payments, Year Six - Year Ten	924
Entergy Gulf States Louisiana [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	8,921
Estimated Future Benefits Payments, Year Two	9,219
Estimated Future Benefits Payments, Year Three	9,580
Estimated Future Benefits Payments, Year Four	10,110
Estimated Future Benefits Payments, Year Five	10,706
Estimated Future Benefits Payments, Year Six - Year Ten	59,199
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	45
Estimated Future Medicare Subsidy Receipts, Year Two	50
Estimated Future Medicare Subsidy Receipts, Year Three	56
Estimated Future Medicare Subsidy Receipts, Year Four	204
Estimated Future Medicare Subsidy Receipts, Year Five	223
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	1,434
Entergy Louisiana [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	37,892
Estimated Future Benefits Payments, Year Two	39,070
Estimated Future Benefits Payments, Year Three	40,675
Estimated Future Benefits Payments, Year Four	42,336
Estimated Future Benefits Payments, Year Five	44,058
Estimated Future Benefits Payments, Year Six - Year Ten	256,639
Entergy Louisiana [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	18
Estimated Future Benefits Payments, Year Two	17
Estimated Future Benefits Payments, Year Three	16
Estimated Future Benefits Payments, Year Four	15
Estimated Future Benefits Payments, Year Five	17
Estimated Future Benefits Payments, Year Six - Year Ten	90
Entergy Louisiana [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	9,885
Estimated Future Benefits Payments, Year Two	10,016
Estimated Future Benefits Payments, Year Three	10,148
Estimated Future Benefits Payments, Year Four	10,654
Estimated Future Benefits Payments, Year Five	11,048
Estimated Future Benefits Payments, Year Six - Year Ten	60,735
Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	29
Estimated Future Medicare Subsidy Receipts, Year Two	32
Estimated Future Medicare Subsidy Receipts, Year Three	34
Estimated Future Medicare Subsidy Receipts, Year Four	125
Estimated Future Medicare Subsidy Receipts, Year Five	136
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	839
Entergy Mississippi [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	18,702
Estimated Future Benefits Payments, Year Two	19,625
Estimated Future Benefits Payments, Year Three	20,517
Estimated Future Benefits Payments, Year Four	21,444
Estimated Future Benefits Payments, Year Five	22,306
Estimated Future Benefits Payments, Year Six - Year Ten	125,761
Entergy Mississippi [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	119
Estimated Future Benefits Payments, Year Two	115
Estimated Future Benefits Payments, Year Three	124
Estimated Future Benefits Payments, Year Four	114
Estimated Future Benefits Payments, Year Five	112
Estimated Future Benefits Payments, Year Six - Year Ten	825
Entergy Mississippi [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	3,926
Estimated Future Benefits Payments, Year Two	4,001
Estimated Future Benefits Payments, Year Three	4,125
Estimated Future Benefits Payments, Year Four	4,433
Estimated Future Benefits Payments, Year Five	4,599
Estimated Future Benefits Payments, Year Six - Year Ten	25,341
Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	23
Estimated Future Medicare Subsidy Receipts, Year Two	24
Estimated Future Medicare Subsidy Receipts, Year Three	25
Estimated Future Medicare Subsidy Receipts, Year Four	87
Estimated Future Medicare Subsidy Receipts, Year Five	90
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	506
Entergy New Orleans [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	7,397
Estimated Future Benefits Payments, Year Two	7,836
Estimated Future Benefits Payments, Year Three	8,304
Estimated Future Benefits Payments, Year Four	8,895
Estimated Future Benefits Payments, Year Five	9,368
Estimated Future Benefits Payments, Year Six - Year Ten	56,659
Entergy New Orleans [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	23
Estimated Future Benefits Payments, Year Two	23
Estimated Future Benefits Payments, Year Three	23
Estimated Future Benefits Payments, Year Four	23
Estimated Future Benefits Payments, Year Five	46
Estimated Future Benefits Payments, Year Six - Year Ten	199
Entergy New Orleans [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	4,261
Estimated Future Benefits Payments, Year Two	4,253
Estimated Future Benefits Payments, Year Three	4,280
Estimated Future Benefits Payments, Year Four	4,373
Estimated Future Benefits Payments, Year Five	4,412
Estimated Future Benefits Payments, Year Six - Year Ten	21,584
Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	34
Estimated Future Medicare Subsidy Receipts, Year Two	37
Estimated Future Medicare Subsidy Receipts, Year Three	40
Estimated Future Medicare Subsidy Receipts, Year Four	142
Estimated Future Medicare Subsidy Receipts, Year Five	151
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	922
Entergy Texas [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	19,078
Estimated Future Benefits Payments, Year Two	19,697
Estimated Future Benefits Payments, Year Three	20,558
Estimated Future Benefits Payments, Year Four	21,448
Estimated Future Benefits Payments, Year Five	22,291
Estimated Future Benefits Payments, Year Six - Year Ten	125,001
Entergy Texas [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	753
Estimated Future Benefits Payments, Year Two	837
Estimated Future Benefits Payments, Year Three	784
Estimated Future Benefits Payments, Year Four	749
Estimated Future Benefits Payments, Year Five	720
Estimated Future Benefits Payments, Year Six - Year Ten	3,442
Entergy Texas [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	6,617
Estimated Future Benefits Payments, Year Two	6,785
Estimated Future Benefits Payments, Year Three	7,012
Estimated Future Benefits Payments, Year Four	7,438
Estimated Future Benefits Payments, Year Five	7,771
Estimated Future Benefits Payments, Year Six - Year Ten	41,303
System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	9
Estimated Future Medicare Subsidy Receipts, Year Two	11
Estimated Future Medicare Subsidy Receipts, Year Three	1
Estimated Future Medicare Subsidy Receipts, Year Four	52
Estimated Future Medicare Subsidy Receipts, Year Five	59
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	456
System Energy [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	11,432
Estimated Future Benefits Payments, Year Two	11,949
Estimated Future Benefits Payments, Year Three	12,357
Estimated Future Benefits Payments, Year Four	12,977
Estimated Future Benefits Payments, Year Five	13,724
Estimated Future Benefits Payments, Year Six - Year Ten	87,663
System Energy [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	2,796
Estimated Future Benefits Payments, Year Two	2,802
Estimated Future Benefits Payments, Year Three	2,883
Estimated Future Benefits Payments, Year Four	2,984
Estimated Future Benefits Payments, Year Five	3,138
Estimated Future Benefits Payments, Year Six - Year Ten	$ 17,664