Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Estimated Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	$ 865
Estimated Future Medicare Subsidy Receipts, Year Two	977
Estimated Future Medicare Subsidy Receipts, Year Three	1,102
Estimated Future Medicare Subsidy Receipts, Year Four	1,229
Estimated Future Medicare Subsidy Receipts, Year Five	1,370
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	9,007
Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	552,111
Estimated Future Benefits Payments, Year Two	437,699
Estimated Future Benefits Payments, Year Three	461,562
Estimated Future Benefits Payments, Year Four	467,822
Estimated Future Benefits Payments, Year Five	480,531
Estimated Future Benefits Payments, Year Six - Year Ten	2,481,536
Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	16,964
Estimated Future Benefits Payments, Year Two	14,679
Estimated Future Benefits Payments, Year Three	10,563
Estimated Future Benefits Payments, Year Four	17,805
Estimated Future Benefits Payments, Year Five	17,578
Estimated Future Benefits Payments, Year Six - Year Ten	68,687
Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	78,232
Estimated Future Benefits Payments, Year Two	80,312
Estimated Future Benefits Payments, Year Three	81,718
Estimated Future Benefits Payments, Year Four	82,624
Estimated Future Benefits Payments, Year Five	82,337
Estimated Future Benefits Payments, Year Six - Year Ten	400,498
Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	192
Estimated Future Medicare Subsidy Receipts, Year Two	216
Estimated Future Medicare Subsidy Receipts, Year Three	239
Estimated Future Medicare Subsidy Receipts, Year Four	264
Estimated Future Medicare Subsidy Receipts, Year Five	291
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	1,836
Entergy Arkansas [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	100,948
Estimated Future Benefits Payments, Year Two	91,941
Estimated Future Benefits Payments, Year Three	92,675
Estimated Future Benefits Payments, Year Four	94,051
Estimated Future Benefits Payments, Year Five	94,474
Estimated Future Benefits Payments, Year Six - Year Ten	479,455
Entergy Arkansas [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	198
Estimated Future Benefits Payments, Year Two	295
Estimated Future Benefits Payments, Year Three	254
Estimated Future Benefits Payments, Year Four	503
Estimated Future Benefits Payments, Year Five	356
Estimated Future Benefits Payments, Year Six - Year Ten	1,295
Entergy Arkansas [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	13,709
Estimated Future Benefits Payments, Year Two	13,520
Estimated Future Benefits Payments, Year Three	13,444
Estimated Future Benefits Payments, Year Four	13,183
Estimated Future Benefits Payments, Year Five	12,926
Estimated Future Benefits Payments, Year Six - Year Ten	61,088
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	193
Estimated Future Medicare Subsidy Receipts, Year Two	215
Estimated Future Medicare Subsidy Receipts, Year Three	240
Estimated Future Medicare Subsidy Receipts, Year Four	265
Estimated Future Medicare Subsidy Receipts, Year Five	292
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	1,919
Entergy Louisiana [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	145,515
Estimated Future Benefits Payments, Year Two	101,275
Estimated Future Benefits Payments, Year Three	104,465
Estimated Future Benefits Payments, Year Four	106,307
Estimated Future Benefits Payments, Year Five	107,771
Estimated Future Benefits Payments, Year Six - Year Ten	547,028
Entergy Louisiana [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	229
Estimated Future Benefits Payments, Year Two	217
Estimated Future Benefits Payments, Year Three	204
Estimated Future Benefits Payments, Year Four	194
Estimated Future Benefits Payments, Year Five	180
Estimated Future Benefits Payments, Year Six - Year Ten	711
Entergy Louisiana [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	17,933
Estimated Future Benefits Payments, Year Two	18,306
Estimated Future Benefits Payments, Year Three	18,526
Estimated Future Benefits Payments, Year Four	18,714
Estimated Future Benefits Payments, Year Five	18,842
Estimated Future Benefits Payments, Year Six - Year Ten	91,994
Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	66
Estimated Future Medicare Subsidy Receipts, Year Two	72
Estimated Future Medicare Subsidy Receipts, Year Three	79
Estimated Future Medicare Subsidy Receipts, Year Four	85
Estimated Future Medicare Subsidy Receipts, Year Five	92
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	559
Entergy Mississippi [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	30,687
Estimated Future Benefits Payments, Year Two	27,376
Estimated Future Benefits Payments, Year Three	27,023
Estimated Future Benefits Payments, Year Four	27,348
Estimated Future Benefits Payments, Year Five	27,773
Estimated Future Benefits Payments, Year Six - Year Ten	139,930
Entergy Mississippi [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	128
Estimated Future Benefits Payments, Year Two	306
Estimated Future Benefits Payments, Year Three	203
Estimated Future Benefits Payments, Year Four	213
Estimated Future Benefits Payments, Year Five	191
Estimated Future Benefits Payments, Year Six - Year Ten	1,633
Entergy Mississippi [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	4,320
Estimated Future Benefits Payments, Year Two	4,508
Estimated Future Benefits Payments, Year Three	4,615
Estimated Future Benefits Payments, Year Four	4,689
Estimated Future Benefits Payments, Year Five	4,686
Estimated Future Benefits Payments, Year Six - Year Ten	23,192
Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	39
Estimated Future Medicare Subsidy Receipts, Year Two	42
Estimated Future Medicare Subsidy Receipts, Year Three	44
Estimated Future Medicare Subsidy Receipts, Year Four	46
Estimated Future Medicare Subsidy Receipts, Year Five	48
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	270
Entergy New Orleans [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	18,436
Estimated Future Benefits Payments, Year Two	12,476
Estimated Future Benefits Payments, Year Three	12,555
Estimated Future Benefits Payments, Year Four	12,938
Estimated Future Benefits Payments, Year Five	13,250
Estimated Future Benefits Payments, Year Six - Year Ten	64,413
Entergy New Orleans [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	16
Estimated Future Benefits Payments, Year Two	16
Estimated Future Benefits Payments, Year Three	16
Estimated Future Benefits Payments, Year Four	15
Estimated Future Benefits Payments, Year Five	15
Estimated Future Benefits Payments, Year Six - Year Ten	72
Entergy New Orleans [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	3,634
Estimated Future Benefits Payments, Year Two	3,576
Estimated Future Benefits Payments, Year Three	3,468
Estimated Future Benefits Payments, Year Four	3,326
Estimated Future Benefits Payments, Year Five	3,251
Estimated Future Benefits Payments, Year Six - Year Ten	14,573
Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	71
Estimated Future Medicare Subsidy Receipts, Year Two	77
Estimated Future Medicare Subsidy Receipts, Year Three	84
Estimated Future Medicare Subsidy Receipts, Year Four	91
Estimated Future Medicare Subsidy Receipts, Year Five	97
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	599
Entergy Texas [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	34,401
Estimated Future Benefits Payments, Year Two	27,273
Estimated Future Benefits Payments, Year Three	27,137
Estimated Future Benefits Payments, Year Four	27,420
Estimated Future Benefits Payments, Year Five	27,797
Estimated Future Benefits Payments, Year Six - Year Ten	129,657
Entergy Texas [Member] | Non-Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	672
Estimated Future Benefits Payments, Year Two	733
Estimated Future Benefits Payments, Year Three	753
Estimated Future Benefits Payments, Year Four	686
Estimated Future Benefits Payments, Year Five	904
Estimated Future Benefits Payments, Year Six - Year Ten	3,481
Entergy Texas [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	5,802
Estimated Future Benefits Payments, Year Two	5,964
Estimated Future Benefits Payments, Year Three	6,109
Estimated Future Benefits Payments, Year Four	6,206
Estimated Future Benefits Payments, Year Five	6,207
Estimated Future Benefits Payments, Year Six - Year Ten	29,810
System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Medicare Subsidy Receipts, Year One	28
Estimated Future Medicare Subsidy Receipts, Year Two	34
Estimated Future Medicare Subsidy Receipts, Year Three	39
Estimated Future Medicare Subsidy Receipts, Year Four	46
Estimated Future Medicare Subsidy Receipts, Year Five	54
Estimated Future Medicare Subsidy Receipts, Year Six - Year Ten	394
System Energy [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	20,792
Estimated Future Benefits Payments, Year Two	19,907
Estimated Future Benefits Payments, Year Three	20,628
Estimated Future Benefits Payments, Year Four	21,678
Estimated Future Benefits Payments, Year Five	21,970
Estimated Future Benefits Payments, Year Six - Year Ten	114,223
System Energy [Member] | Other Postretirement Benefit Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Future Benefits Payments, Year One	3,082
Estimated Future Benefits Payments, Year Two	3,068
Estimated Future Benefits Payments, Year Three	3,160
Estimated Future Benefits Payments, Year Four	3,163
Estimated Future Benefits Payments, Year Five	3,126
Estimated Future Benefits Payments, Year Six - Year Ten	$ 14,814