Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Abstract]
Cash	$ 48,424	$ 71,609
Cash Equivalents, at Carrying Value	811,279	60,939
Cash and Cash Equivalents, at Carrying Value, Total	859,703	132,548
Other Restricted Assets, Current		8,000
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	681,504	699,411
Accounts Receivable, Allowance for Credit Loss, Current	(17,919)	(25,905)
Other Receivables	204,868	225,334
Unbilled Receivables, Current	521,946	494,615
Accounts and Other Receivables, Net, Current	1,390,399	1,393,455
Deferred Fuel Cost	0	169,967
Energy Related Inventory	166,408	192,799
Public Utilities, Inventory	1,631,056	1,418,969
Deferred Nuclear Refueling Outage Costs	99,885	140,115
Disposal Group, Including Discontinued Operation, Assets, Current	15,574	0
Prepaid Expense and Other Assets, Current	233,212	213,016
Assets, Current, Total	4,396,237	3,660,869
Assets, Noncurrent [Abstract]
Decommissioning Fund Investments	5,562,575	4,863,710
Property, Plant and Equipment, Net	423,764	418,546
Asset Recovery Damaged Property Costs, Noncurrent	340,460	323,206
Other Long-Term Investments	82,344	69,494
Long-Term Investments, Total	6,409,143	5,674,956
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	70,818,667	66,850,474
Public Utilities, Property, Plant and Equipment, Natural Gas	77,054	717,503
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	3,206,308	2,109,703
Public Utilities, Property, Plant and Equipment, Fuel	765,661	707,852
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	74,867,690	70,385,532
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	27,444,740	26,551,203
Public Utilities, Property, Plant and Equipment, Net, Total	47,422,950	43,834,329
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	5,255,509	5,669,404
Deferred Fuel Cost, Noncurrent	172,201	172,201
Goodwill	367,625	374,099
Deferred Income Tax Assets, Net	18,986	16,367
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	462,797	0
Other Assets, Noncurrent	284,584	301,171
Deferred Costs and Other Assets	6,561,702	6,533,242
Assets, Total	64,790,032	59,703,396
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	1,378,090	2,099,057
Short-Term Debt	927,291	1,138,171
Accounts Payable, Current	1,929,162	1,566,745
Contract with Customer, Refund Liability, Current	462,436	446,146
Taxes Payable, Current	457,093	434,213
Interest Payable, Current	259,554	214,197
Deferred Fuel Costs, Current Liability	237,146	218,927
Liability, Defined Benefit Plan, Current	64,854	59,508
Other Liabilities, Current	395,411	219,528
Liabilities, Current, Total	6,111,037	6,396,492
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	4,467,748	4,245,982
Accumulated Deferred Investment Tax Credit	194,146	205,973
Regulatory Liability For Income Taxes Net	1,168,078	1,033,242
Regulatory Liability, Noncurrent	3,609,463	3,116,926
Asset Retirement Obligations, Noncurrent	4,713,426	4,505,782
Loss Contingency Accrual	506,063	462,570
Liability, Defined Benefit Plan, Noncurrent	254,704	648,413
Long-Term Debt, Excluding Current Maturities	26,613,505	23,008,839
Customer advances for construction, noncurrent	634,587	292,077
Deferred Credits and Other Liabilities	1,112,881	824,584
Liabilities, Noncurrent, Total	43,274,601	38,344,388
Commitments and Contingencies
Temporary Equity, Carrying Amount, Attributable to Parent	219,410	219,410
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	5,620	5,620
Additional Paid in Capital	7,833,525	7,792,601
Retained Earnings (Accumulated Deficit)	12,014,315	11,940,384
Accumulated Other Comprehensive Income (Loss), Net of Tax	42,769	(162,460)
Treasury Stock, Value	4,812,321	4,953,498
Subsidiaries’ Preferred Stock Value and Equity Attributable to Noncontrolling Interests	101,076	120,459
Equity, Including Portion Attributable to Noncontrolling Interest, Total	15,184,984	14,743,106
Equity, Attributable to Parent, Total	15,083,908	14,622,647
Liabilities and Equity, Total	64,790,032	59,703,396
Entergy New Orleans [Member]
Cash and Cash Equivalents [Abstract]
Cash	374	26
Cash Equivalents, at Carrying Value	31,403	0
Cash and Cash Equivalents, at Carrying Value, Total	31,777	26
Other Restricted Assets, Current	1,611	2,426
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(6,735)	(7,770)
Other Receivables	9,467	5,270
Unbilled Receivables, Current	33,296	31,087
Accounts and Other Receivables, Net, Current	107,603	97,502
Deferred Fuel Cost	0	6,148
Energy Related Inventory	320	3,298
Public Utilities, Inventory	25,516	30,019
Prepaid Taxes	0	1,574
Disposal Group, Including Discontinued Operation, Assets, Current	13,100	0
Prepaid Expense and Other Assets, Current	12,128	11,482
Assets, Current, Total	192,055	152,475
Assets, Noncurrent [Abstract]
Asset Recovery Damaged Property Costs, Noncurrent	83,742	78,731
Other Long-Term Investments	832	832
Long-Term Investments, Total	84,574	79,563
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	2,160,165	2,046,928
Public Utilities, Property, Plant and Equipment, Natural Gas	43,279	401,846
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	18,269	25,424
Public Utilities, Property, Plant and Equipment, Fuel	0	0
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	2,221,713	2,474,198
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	768,305	858,672
Public Utilities, Property, Plant and Equipment, Net, Total	1,453,408	1,615,526
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	133,261	182,367
Deferred Fuel Cost, Noncurrent	4,080	4,080
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	284,738	0
Other Assets, Noncurrent	71,037	63,964
Deferred Costs and Other Assets	493,116	250,411
Assets, Total	2,223,153	2,097,975
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	78,000	85,000
Contract with Customer, Refund Liability, Current	28,834	32,420
Taxes Payable, Current	8,786	0
Interest Payable, Current	8,671	8,534
Deferred Fuel Costs, Current Liability	980	0
Other Liabilities, Current	14,427	8,953
Liabilities, Current, Total	230,067	252,731
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	201,541	195,615
Accumulated Deferred Investment Tax Credit	15,617	16,457
Regulatory Liability For Income Taxes Net	15,000	36,061
Regulatory Liability, Noncurrent	260,312	90,434
Loss Contingency Accrual	90,293	88,124
Long-Term Debt, Excluding Current Maturities	650,463	584,171
Deferred Credits and Other Liabilities	56,395	20,624
Liabilities, Noncurrent, Total	1,295,485	1,038,490
Commitments and Contingencies
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Members' Equity	697,601	806,754
Equity, Including Portion Attributable to Noncontrolling Interest, Total	697,601	806,754
Liabilities and Equity, Total	2,223,153	2,097,975
Entergy New Orleans [Member] | Affiliated Entity [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	5,844	1,657
Liabilities, Current [Abstract]
Notes Payable, Current	1,140	1,275
Accounts Payable, Current	45,479	76,736
Liabilities, Noncurrent [Abstract]
Notes Payable, Noncurrent	5,864	7,004
Entergy New Orleans [Member] | Nonrelated Party [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	65,731	67,258
Liabilities, Current [Abstract]
Accounts Payable, Current	43,750	39,813
Entergy Louisiana [Member]
Cash and Cash Equivalents [Abstract]
Cash	327	2,255
Cash Equivalents, at Carrying Value	326,775	517
Cash and Cash Equivalents, at Carrying Value, Total	327,102	2,772
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(3,036)	(6,156)
Other Receivables	39,056	74,685
Unbilled Receivables, Current	213,026	202,173
Accounts and Other Receivables, Net, Current	646,190	617,770
Deferred Fuel Cost	0	24,800
Energy Related Inventory	49,515	57,818
Public Utilities, Inventory	782,459	652,180
Deferred Nuclear Refueling Outage Costs	31,121	96,047
Disposal Group, Including Discontinued Operation, Assets, Current	2,474	0
Prepaid Expense and Other Assets, Current	84,236	71,613
Assets, Current, Total	1,923,097	1,523,000
Assets, Noncurrent [Abstract]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	4,256,997	4,496,245
Decommissioning Fund Investments	2,429,088	2,107,384
Property, Plant and Equipment, Net	410,611	404,043
Asset Recovery Damaged Property Costs, Noncurrent	256,718	243,819
Other Long-Term Investments	9,749	9,367
Long-Term Investments, Total	7,363,163	7,260,858
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	28,736,547	27,800,467
Public Utilities, Property, Plant and Equipment, Natural Gas	33,775	315,658
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	761,090	592,803
Public Utilities, Property, Plant and Equipment, Fuel	288,084	333,472
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	29,819,496	29,042,400
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	10,794,817	10,570,707
Public Utilities, Property, Plant and Equipment, Net, Total	19,024,679	18,471,693
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	1,637,967	1,648,852
Deferred Fuel Cost, Noncurrent	168,122	168,122
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	173,669	0
Other Assets, Noncurrent	57,853	36,945
Deferred Costs and Other Assets	2,037,611	1,853,919
Assets, Total	30,348,550	29,109,470
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	300,000	1,400,000
Contract with Customer, Refund Liability, Current	169,544	167,905
Taxes Payable, Current	29,002	66,463
Interest Payable, Current	120,186	91,656
Deferred Fuel Costs, Current Liability	5,421	0
Customer advances for construction, current	151,662	0
Other Liabilities, Current	96,426	87,468
Liabilities, Current, Total	1,514,016	2,563,922
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	2,477,954	2,391,442
Accumulated Deferred Investment Tax Credit	88,679	93,242
Regulatory Liability For Income Taxes Net	355,432	193,754
Regulatory Liability, Noncurrent	1,692,547	1,407,689
Asset Retirement Obligations, Noncurrent	1,842,855	1,836,240
Loss Contingency Accrual	279,623	263,869
Liability, Defined Benefit Plan, Noncurrent	160,577	271,928
Long-Term Debt, Excluding Current Maturities	9,566,453	8,020,689
Customer advances for construction, noncurrent	291,842	115,102
Deferred Credits and Other Liabilities	479,178	378,074
Liabilities, Noncurrent, Total	17,235,140	14,972,029
Commitments and Contingencies
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax	53,658	54,798
Members' Equity	11,503,030	11,473,614
Equity, Attributable to Noncontrolling Interest	42,706	45,107
Equity, Including Portion Attributable to Noncontrolling Interest, Total	11,599,394	11,573,519
Liabilities and Equity, Total	30,348,550	29,109,470
Entergy Louisiana [Member] | Affiliated Entity [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	103,055	82,292
Liabilities, Current [Abstract]
Accounts Payable, Current	108,688	283,016
Entergy Louisiana [Member] | Nonrelated Party [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	294,089	264,776
Liabilities, Current [Abstract]
Accounts Payable, Current	533,087	467,414
Entergy Arkansas [Member]
Cash and Cash Equivalents [Abstract]
Cash	1,306	520
Cash Equivalents, at Carrying Value	3,441	3,112
Cash and Cash Equivalents, at Carrying Value, Total	4,747	3,632
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(4,672)	(7,182)
Other Receivables	70,927	89,532
Unbilled Receivables, Current	125,824	117,119
Accounts and Other Receivables, Net, Current	366,725	481,661
Energy Related Inventory	49,937	57,495
Public Utilities, Inventory	384,238	358,302
Deferred Nuclear Refueling Outage Costs	48,879	35,463
Prepaid Expense and Other Assets, Current	41,404	40,866
Assets, Current, Total	895,930	977,419
Assets, Noncurrent [Abstract]
Decommissioning Fund Investments	1,604,428	1,414,009
Other Long-Term Investments	797	801
Long-Term Investments, Total	1,605,225	1,414,810
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	16,371,182	14,821,814
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	320,447	340,601
Public Utilities, Property, Plant and Equipment, Fuel	257,533	213,722
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	16,949,162	15,376,137
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	6,275,150	6,002,203
Public Utilities, Property, Plant and Equipment, Net, Total	10,674,012	9,373,934
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	1,700,110	1,885,361
Other Assets, Noncurrent	198,706	21,334
Deferred Costs and Other Assets	1,898,816	1,906,695
Assets, Total	15,073,983	13,672,858
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	0	375,000
Contract with Customer, Refund Liability, Current	129,267	113,186
Taxes Payable, Current	93,215	105,151
Interest Payable, Current	38,377	35,370
Deferred Fuel Costs, Current Liability	45,158	88,282
Other Liabilities, Current	55,313	55,683
Liabilities, Current, Total	656,507	1,213,518
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	1,489,169	1,437,053
Accumulated Deferred Investment Tax Credit	26,069	27,270
Regulatory Liability For Income Taxes Net	417,561	392,496
Regulatory Liability, Noncurrent	831,165	759,181
Asset Retirement Obligations, Noncurrent	1,691,583	1,560,057
Loss Contingency Accrual	76,479	58,959
Long-Term Debt, Excluding Current Maturities	5,122,494	4,298,080
Deferred Credits and Other Liabilities	298,951	165,574
Liabilities, Noncurrent, Total	9,953,471	8,698,670
Commitments and Contingencies
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Members' Equity	4,448,837	3,739,071
Equity, Attributable to Noncontrolling Interest	15,168	21,599
Equity, Including Portion Attributable to Noncontrolling Interest, Total	4,464,005	3,760,670
Liabilities and Equity, Total	15,073,983	13,672,858
Entergy Arkansas [Member] | Affiliated Entity [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	35,412	124,672
Liabilities, Current [Abstract]
Accounts Payable, Current	85,137	225,344
Entergy Arkansas [Member] | Nonrelated Party [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	139,234	157,520
Liabilities, Current [Abstract]
Accounts Payable, Current	210,040	215,502
Entergy Mississippi [Member]
Cash and Cash Equivalents [Abstract]
Cash	184	30
Cash Equivalents, at Carrying Value	155,509	6,600
Cash and Cash Equivalents, at Carrying Value, Total	155,693	6,630
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(2,172)	(3,312)
Other Receivables	25,148	17,697
Unbilled Receivables, Current	75,740	71,465
Accounts and Other Receivables, Net, Current	220,234	212,236
Energy Related Inventory	14,963	16,196
Public Utilities, Inventory	113,256	95,526
Prepaid Expense and Other Assets, Current	19,764	12,740
Assets, Current, Total	523,910	343,328
Assets, Noncurrent [Abstract]
Property, Plant and Equipment, Net	4,482	4,497
Asset Recovery Damaged Property Costs, Noncurrent	0	656
Other Long-Term Investments	880	0
Long-Term Investments, Total	5,362	5,153
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	7,860,409	7,455,145
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	487,273	139,635
Public Utilities, Property, Plant and Equipment, Fuel	0	0
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	8,347,682	7,594,780
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	2,511,091	2,346,327
Public Utilities, Property, Plant and Equipment, Net, Total	5,836,591	5,248,453
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	525,847	579,076
Other Assets, Noncurrent	97,260	51,996
Deferred Costs and Other Assets	623,107	631,072
Assets, Total	6,988,970	6,228,006
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	0	100,000
Contract with Customer, Refund Liability, Current	94,009	92,637
Taxes Payable, Current	179,024	115,134
Interest Payable, Current	20,667	21,537
Deferred Fuel Costs, Current Liability	126,316	130,645
Other Liabilities, Current	20,720	26,463
Liabilities, Current, Total	782,578	712,646
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	870,116	821,744
Accumulated Deferred Investment Tax Credit	13,446	13,811
Regulatory Liability For Income Taxes Net	180,851	188,714
Regulatory Liability, Noncurrent	59,544	33,696
Asset Retirement Obligations, Noncurrent	25,110	8,229
Loss Contingency Accrual	47,200	39,481
Long-Term Debt, Excluding Current Maturities	2,427,073	2,129,510
Customer advances for construction, noncurrent	112,618	32,659
Deferred Credits and Other Liabilities	61,446	39,302
Liabilities, Noncurrent, Total	3,797,404	3,307,146
Commitments and Contingencies
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Members' Equity	2,400,786	2,189,461
Equity, Attributable to Noncontrolling Interest	8,202	18,753
Equity, Including Portion Attributable to Noncontrolling Interest, Total	2,408,988	2,208,214
Liabilities and Equity, Total	6,988,970	6,228,006
Entergy Mississippi [Member] | Affiliated Entity [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	23,909	4,997
Liabilities, Current [Abstract]
Accounts Payable, Current	58,087	133,571
Entergy Mississippi [Member] | Nonrelated Party [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	97,609	121,389
Liabilities, Current [Abstract]
Accounts Payable, Current	283,755	92,659
Entergy Texas [Member]
Cash and Cash Equivalents [Abstract]
Cash	291	1,497
Cash Equivalents, at Carrying Value	184,706	20,489
Cash and Cash Equivalents, at Carrying Value, Total	184,997	21,986
Other Restricted Assets, Current	2,703	5,195
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(1,304)	(1,484)
Other Receivables	43,773	24,416
Unbilled Receivables, Current	74,060	72,771
Accounts and Other Receivables, Net, Current	227,935	514,112
Deferred Fuel Cost	0	139,019
Energy Related Inventory	45,970	50,847
Public Utilities, Inventory	157,241	123,020
Prepaid Expense and Other Assets, Current	34,803	35,232
Assets, Current, Total	653,649	889,411
Assets, Noncurrent [Abstract]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	107	214
Other Long-Term Investments	15,878	15,444
Long-Term Investments, Total	15,985	15,658
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	8,628,625	7,931,340
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,513,170	857,707
Public Utilities, Property, Plant and Equipment, Fuel	0	0
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	10,141,795	8,789,047
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	2,548,961	2,363,919
Public Utilities, Property, Plant and Equipment, Net, Total	7,592,834	6,425,128
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	549,708	596,606
Other Assets, Noncurrent	157,904	129,769
Deferred Costs and Other Assets	707,612	726,375
Assets, Total	8,970,080	8,056,572
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	0	0
Contract with Customer, Refund Liability, Current	40,782	39,999
Taxes Payable, Current	76,474	78,887
Interest Payable, Current	38,703	31,285
Deferred Fuel Costs, Current Liability	59,271	0
Other Liabilities, Current	20,836	16,237
Liabilities, Current, Total	662,805	436,534
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	868,849	814,905
Accumulated Deferred Investment Tax Credit	7,215	7,963
Regulatory Liability For Income Taxes Net	93,766	114,759
Regulatory Liability, Noncurrent	18,705	43,013
Asset Retirement Obligations, Noncurrent	17,688	11,743
Loss Contingency Accrual	9,985	9,480
Long-Term Debt, Excluding Current Maturities	3,552,443	3,225,092
Deferred Credits and Other Liabilities	397,412	274,421
Liabilities, Noncurrent, Total	4,966,063	4,501,376
Commitments and Contingencies
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Value, Issued	38,750	38,750
Common Stock, Value, Issued	49,452	49,452
Additional Paid in Capital	1,200,125	1,200,125
Retained Earnings (Accumulated Deficit)	2,052,885	1,830,335
Equity, Including Portion Attributable to Noncontrolling Interest, Total	3,341,212	3,118,662
Equity, Attributable to Parent, Total	3,302,462	3,079,912
Liabilities and Equity, Total	8,970,080	8,056,572
Entergy Texas [Member] | Affiliated Entity [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	26,564	329,941
Liabilities, Current [Abstract]
Accounts Payable, Current	65,335	74,423
Entergy Texas [Member] | Nonrelated Party [Member]
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	84,842	88,468
Liabilities, Current [Abstract]
Accounts Payable, Current	361,404	195,703
System Energy [Member]
Cash and Cash Equivalents [Abstract]
Cash	448	60
Cash Equivalents, at Carrying Value	28,460	0
Cash and Cash Equivalents, at Carrying Value, Total	28,908	60
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	48,134	54,544
Other Receivables	5,425	6,861
Accounts and Other Receivables, Net, Current	53,559	61,405
Public Utilities, Inventory	163,814	155,565
Deferred Nuclear Refueling Outage Costs	19,884	8,603
Prepaid Expense and Other Assets, Current	5,768	3,373
Assets, Current, Total	271,933	229,006
Assets, Noncurrent [Abstract]
Decommissioning Fund Investments	1,529,059	1,342,317
Long-Term Investments, Total	1,529,059	1,342,317
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	5,668,253	5,495,728
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	85,127	130,866
Public Utilities, Property, Plant and Equipment, Fuel	220,044	160,655
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	5,973,424	5,787,249
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	3,578,709	3,493,299
Public Utilities, Property, Plant and Equipment, Net, Total	2,394,715	2,293,950
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	426,494	446,360
Other Assets, Noncurrent	20,273	730
Deferred Costs and Other Assets	446,767	447,090
Assets, Total	4,642,474	4,312,363
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	200,090	57
Taxes Payable, Current	15,852	27,401
Interest Payable, Current	13,342	12,954
Other Liabilities, Current	4,473	4,354
Liabilities, Current, Total	297,251	236,869
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	451,830	405,744
Accumulated Deferred Investment Tax Credit	42,984	46,960
Regulatory Liability For Income Taxes Net	105,467	107,458
Regulatory Liability, Noncurrent	747,190	782,912
Asset Retirement Obligations, Noncurrent	1,127,712	1,084,234
Liability, Defined Benefit Plan, Noncurrent	8,353	19,491
Long-Term Debt, Excluding Current Maturities	889,646	738,402
Deferred Credits and Other Liabilities	2	1,754
Liabilities, Noncurrent, Total	3,373,184	3,186,955
Commitments and Contingencies
Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock, Value, Issued	958,944	916,850
Retained Earnings (Accumulated Deficit)	13,095	(28,311)
Equity, Including Portion Attributable to Noncontrolling Interest, Total	972,039	888,539
Liabilities and Equity, Total	4,642,474	4,312,363
System Energy [Member] | Affiliated Entity [Member]
Liabilities, Current [Abstract]
Accounts Payable, Current	18,477	118,523
System Energy [Member] | Nonrelated Party [Member]
Liabilities, Current [Abstract]
Accounts Payable, Current	$ 45,017	$ 73,580