Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Cash	$ 82,709	$ 48,424
Cash Equivalents, at Carrying Value	1,434,260	811,279
Cash and Cash Equivalents, at Carrying Value, Total	1,516,969	859,703
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	1,013,208	681,504
Accounts Receivable, Allowance for Credit Loss, Current	(27,765)	(17,919)
Other Receivables	250,204	204,868
Unbilled Receivables, Current	544,792	521,946
Accounts and Other Receivables, Net, Current	1,780,439	1,390,399
Deferred Fuel Cost	4,375	0
Energy Related Inventory	150,064	166,408
Public Utilities, Inventory	1,657,842	1,631,056
Prepaid Expense and Other Assets, Current	366,482	233,212
Deferred Nuclear Refueling Outage Costs	82,586	99,885
Assets, Current, Total	5,558,757	4,396,237
Assets, Noncurrent [Abstract]
Decommissioning Fund Investments	6,193,249	5,562,575
Property, Plant and Equipment, Net	476,826	423,764
Asset Recovery Damaged Property Costs, Noncurrent	306,651	340,460
Other Long-Term Investments	85,740	82,344
Long-Term Investments, Total	7,062,466	6,409,143
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	73,233,103	70,818,667
Public Utilities, Property, Plant and Equipment, Natural Gas	0	77,054
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	5,805,087	3,206,308
Public Utilities, Property, Plant and Equipment, Fuel	729,777	765,661
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	79,767,967	74,867,690
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	28,490,326	27,444,740
Public Utilities, Property, Plant and Equipment, Net, Total	51,277,641	47,422,950
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	4,986,139	5,255,509
Deferred Fuel Cost, Noncurrent	172,201	172,201
Goodwill	367,582	367,625
Deferred Income Tax Assets, Net	24,867	18,986
Other Assets, Noncurrent	398,754	284,584
Deferred Costs and Other Assets	5,949,543	6,561,702
Assets, Total	69,848,407	64,790,032
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	1,975,140	1,378,090
Short-Term Debt	1,414,894	927,291
Accounts Payable, Current	2,184,702	1,929,162
Contract with Customer, Refund Liability, Current	477,831	462,436
Taxes Payable, Current	634,621	457,093
Interest Payable, Current	303,245	259,554
Deferred Fuel Costs Current Liabilities	45,955	237,146
Liability, Defined Benefit Plan, Current	50,462	64,854
Other Liabilities, Current	259,299	243,749
Liabilities, Current, Total	7,791,225	6,111,037
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	5,405,353	4,467,748
Accumulated Deferred Investment Tax Credit	187,608	194,146
Regulatory Liability For Income Taxes - Net	1,120,090	1,168,078
Regulatory Liability, Noncurrent	3,834,485	3,609,463
Asset Retirement Obligations, Noncurrent	4,886,502	4,713,426
Loss Contingency Accrual	480,529	506,063
Liability, Defined Benefit Plan, Noncurrent	140,266	254,704
Long-Term Debt, Excluding Current Maturities	27,058,119	26,613,505
Deferred Credits and Other Liabilities	935,942	1,112,881
Liabilities, Noncurrent, Total	45,081,418	43,274,601
Commitments and Contingencies
Temporary Equity, Carrying Amount, Attributable to Parent	219,410	219,410
Common Shareholders Equity [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	5,775	5,620
Additional Paid in Capital, Common Stock	8,632,808	7,833,525
Retained Earnings (Accumulated Deficit)	12,752,150	12,014,315
Accumulated Other Comprehensive Income (Loss), Net of Tax	30,355	42,769
Treasury Stock, Value	4,759,386	4,812,321
Equity, Attributable to Parent, Total	16,661,702	15,083,908
Equity, Attributable to Noncontrolling Interest	94,652	101,076
Equity, Including Portion Attributable to Noncontrolling Interest, Total	16,756,354	15,184,984
Liabilities and Equity, Total	69,848,407	64,790,032
Customer Advances, Current Liabilities	445,076	151,662
Customer advances for construction, noncurrent	1,032,524	634,587
Disposal Group, Including Discontinued Operation, Assets, Current	0	15,574
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	$ 0	$ 462,797
Common Stock, Shares, Issued	577,511,170	561,950,696
Entergy Arkansas [Member]
Cash and Cash Equivalents [Abstract]
Cash	$ 11,314	$ 1,306
Cash Equivalents, at Carrying Value	465,092	3,441
Cash and Cash Equivalents, at Carrying Value, Total	476,406	4,747
Accounts Receivable [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(6,020)	(4,672)
Other Receivables	70,872	70,927
Unbilled Receivables, Current	136,091	125,824
Accounts and Other Receivables, Net, Current	587,664	366,725
Deferred Fuel Cost	4,375	0
Energy Related Inventory	53,399	49,937
Public Utilities, Inventory	417,556	384,238
Prepaid Expense and Other Assets, Current	53,844	41,404
Deferred Nuclear Refueling Outage Costs	20,024	48,879
Assets, Current, Total	1,613,268	895,930
Assets, Noncurrent [Abstract]
Decommissioning Fund Investments	1,787,712	1,604,428
Other Long-Term Investments	794	797
Long-Term Investments, Total	1,788,506	1,605,225
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	16,671,929	16,371,182
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	663,518	320,447
Public Utilities, Property, Plant and Equipment, Fuel	229,925	257,533
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	17,565,372	16,949,162
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	6,538,719	6,275,150
Public Utilities, Property, Plant and Equipment, Net, Total	11,026,653	10,674,012
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	1,722,817	1,700,110
Other Assets, Noncurrent	217,630	198,706
Deferred Costs and Other Assets	1,940,447	1,898,816
Assets, Total	16,368,874	15,073,983
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	690,000	0
Contract with Customer, Refund Liability, Current	135,160	129,267
Taxes Payable, Current	96,012	93,215
Interest Payable, Current	70,927	38,377
Deferred Fuel Costs Current Liabilities	0	45,158
Other Liabilities, Current	68,078	55,313
Liabilities, Current, Total	1,425,250	656,507
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	1,787,752	1,489,169
Accumulated Deferred Investment Tax Credit	25,168	26,069
Regulatory Liability For Income Taxes - Net	425,899	417,561
Regulatory Liability, Noncurrent	983,576	831,165
Asset Retirement Obligations, Noncurrent	1,766,552	1,691,583
Loss Contingency Accrual	78,208	76,479
Long-Term Debt, Excluding Current Maturities	4,741,589	5,122,494
Deferred Credits and Other Liabilities	294,335	298,951
Liabilities, Noncurrent, Total	10,103,079	9,953,471
Commitments and Contingencies
Common Shareholders Equity [Abstract]
Members' Equity	4,829,125	4,448,837
Equity, Attributable to Noncontrolling Interest	11,420	15,168
Equity, Including Portion Attributable to Noncontrolling Interest, Total	4,840,545	4,464,005
Liabilities and Equity, Total	16,368,874	15,073,983
Entergy Arkansas [Member] | Affiliated Entity [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	156,097	35,412
Liabilities, Current [Abstract]
Accounts Payable, Current	71,054	85,137
Entergy Arkansas [Member] | Nonrelated Party [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	230,624	139,234
Liabilities, Current [Abstract]
Accounts Payable, Current	294,019	210,040
Entergy Louisiana [Member]
Cash and Cash Equivalents [Abstract]
Cash	1,681	327
Cash Equivalents, at Carrying Value	374,559	326,775
Cash and Cash Equivalents, at Carrying Value, Total	376,240	327,102
Accounts Receivable [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(7,554)	(3,036)
Other Receivables	67,234	39,056
Unbilled Receivables, Current	201,110	213,026
Accounts and Other Receivables, Net, Current	841,161	646,190
Energy Related Inventory	36,168	49,515
Public Utilities, Inventory	759,659	782,459
Prepaid Expense and Other Assets, Current	374,068	84,236
Deferred Nuclear Refueling Outage Costs	50,960	31,121
Assets, Current, Total	2,438,256	1,923,097
Assets, Noncurrent [Abstract]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	4,054,480	4,256,997
Decommissioning Fund Investments	2,701,311	2,429,088
Property, Plant and Equipment, Net	454,756	410,611
Asset Recovery Damaged Property Costs, Noncurrent	230,792	256,718
Other Long-Term Investments	10,051	9,749
Long-Term Investments, Total	7,451,390	7,363,163
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	29,981,521	28,736,547
Public Utilities, Property, Plant and Equipment, Natural Gas	0	33,775
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,629,311	761,090
Public Utilities, Property, Plant and Equipment, Fuel	319,575	288,084
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	31,930,407	29,819,496
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	11,152,062	10,794,817
Public Utilities, Property, Plant and Equipment, Net, Total	20,778,345	19,024,679
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	1,541,114	1,637,967
Deferred Fuel Cost, Noncurrent	168,122	168,122
Other Assets, Noncurrent	84,503	57,853
Deferred Costs and Other Assets	1,793,739	2,037,611
Assets, Total	32,461,730	30,348,550
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	320,000	300,000
Contract with Customer, Refund Liability, Current	173,264	169,544
Taxes Payable, Current	74,127	29,002
Interest Payable, Current	68,735	120,186
Deferred Fuel Costs Current Liabilities	12,149	5,421
Other Liabilities, Current	110,666	96,426
Liabilities, Current, Total	1,925,374	1,514,016
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	2,988,563	2,477,954
Accumulated Deferred Investment Tax Credit	85,303	88,679
Regulatory Liability For Income Taxes - Net	330,393	355,432
Regulatory Liability, Noncurrent	1,634,337	1,692,547
Asset Retirement Obligations, Noncurrent	1,908,427	1,842,855
Loss Contingency Accrual	259,881	279,623
Liability, Defined Benefit Plan, Noncurrent	144,578	160,577
Long-Term Debt, Excluding Current Maturities	10,070,778	9,566,453
Deferred Credits and Other Liabilities	536,546	479,178
Liabilities, Noncurrent, Total	18,592,985	17,235,140
Commitments and Contingencies
Common Shareholders Equity [Abstract]
Members' Equity	11,851,780	11,503,030
Equity, Attributable to Noncontrolling Interest	42,854	42,706
Accumulated Other Comprehensive Income (Loss), Net of Tax	48,737	53,658
Equity, Including Portion Attributable to Noncontrolling Interest, Total	11,943,371	11,599,394
Liabilities and Equity, Total	32,461,730	30,348,550
Customer Advances, Current Liabilities	346,421	151,662
Customer advances for construction, noncurrent	634,179	291,842
Disposal Group, Including Discontinued Operation, Assets, Current	0	2,474
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	173,669
Entergy Louisiana [Member] | Affiliated Entity [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	184,496	103,055
Liabilities, Current [Abstract]
Accounts Payable, Current	106,641	108,688
Entergy Louisiana [Member] | Nonrelated Party [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	395,875	294,089
Liabilities, Current [Abstract]
Accounts Payable, Current	713,371	533,087
Entergy Mississippi [Member]
Cash and Cash Equivalents [Abstract]
Cash	687	184
Cash Equivalents, at Carrying Value	327,988	155,509
Cash and Cash Equivalents, at Carrying Value, Total	328,675	155,693
Accounts Receivable [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(3,494)	(2,172)
Other Receivables	20,369	25,148
Unbilled Receivables, Current	82,980	75,740
Accounts and Other Receivables, Net, Current	343,491	220,234
Energy Related Inventory	21,018	14,963
Public Utilities, Inventory	119,155	113,256
Prepaid Expense and Other Assets, Current	37,092	19,764
Assets, Current, Total	849,431	523,910
Assets, Noncurrent [Abstract]
Property, Plant and Equipment, Net	4,471	4,482
Other Long-Term Investments	951	880
Long-Term Investments, Total	5,422	5,362
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	8,133,759	7,860,409
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	1,106,207	487,273
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	9,239,966	8,347,682
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	2,630,538	2,511,091
Public Utilities, Property, Plant and Equipment, Net, Total	6,609,428	5,836,591
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	454,170	525,847
Other Assets, Noncurrent	106,097	97,260
Deferred Costs and Other Assets	560,267	623,107
Assets, Total	8,024,548	6,988,970
Liabilities, Current [Abstract]
Contract with Customer, Refund Liability, Current	97,734	94,009
Taxes Payable, Current	211,414	179,024
Interest Payable, Current	53,235	20,667
Deferred Fuel Costs Current Liabilities	22,464	126,316
Other Liabilities, Current	24,587	20,720
Liabilities, Current, Total	750,345	782,578
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	907,175	870,116
Accumulated Deferred Investment Tax Credit	13,128	13,446
Regulatory Liability For Income Taxes - Net	173,317	180,851
Regulatory Liability, Noncurrent	69,928	59,544
Asset Retirement Obligations, Noncurrent	26,174	25,110
Loss Contingency Accrual	45,850	47,200
Long-Term Debt, Excluding Current Maturities	3,020,984	2,427,073
Deferred Credits and Other Liabilities	98,578	61,446
Liabilities, Noncurrent, Total	4,549,537	3,797,404
Commitments and Contingencies
Common Shareholders Equity [Abstract]
Members' Equity	2,719,289	2,400,786
Equity, Attributable to Noncontrolling Interest	5,377	8,202
Equity, Including Portion Attributable to Noncontrolling Interest, Total	2,724,666	2,408,988
Liabilities and Equity, Total	8,024,548	6,988,970
Customer Advances, Current Liabilities	98,654	0
Customer advances for construction, noncurrent	194,403	112,618
Entergy Mississippi [Member] | Affiliated Entity [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	93,324	23,909
Liabilities, Current [Abstract]
Accounts Payable, Current	56,960	58,087
Entergy Mississippi [Member] | Nonrelated Party [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	150,312	97,609
Liabilities, Current [Abstract]
Accounts Payable, Current	185,297	283,755
Entergy New Orleans [Member]
Cash and Cash Equivalents [Abstract]
Cash	223	374
Cash Equivalents, at Carrying Value	68,477	31,403
Cash and Cash Equivalents, at Carrying Value, Total	68,700	31,777
Other Restricted Assets, Current	0	1,611
Accounts Receivable [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(4,515)	(6,735)
Other Receivables	5,414	9,467
Unbilled Receivables, Current	31,438	33,296
Accounts and Other Receivables, Net, Current	130,967	107,603
Energy Related Inventory	150	320
Public Utilities, Inventory	30,313	25,516
Prepaid Expense and Other Assets, Current	14,596	12,128
Assets, Current, Total	244,726	192,055
Assets, Noncurrent [Abstract]
Asset Recovery Damaged Property Costs, Noncurrent	75,859	83,742
Other Long-Term Investments	9,600	832
Long-Term Investments, Total	85,459	84,574
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	2,216,707	2,160,165
Public Utilities, Property, Plant and Equipment, Natural Gas	0	43,279
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	50,474	18,269
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	2,267,181	2,221,713
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	772,014	768,305
Public Utilities, Property, Plant and Equipment, Net, Total	1,495,167	1,453,408
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	108,914	133,261
Deferred Fuel Cost, Noncurrent	4,080	4,080
Other Assets, Noncurrent	76,528	71,037
Deferred Costs and Other Assets	189,522	493,116
Assets, Total	2,014,874	2,223,153
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	85,000	78,000
Contract with Customer, Refund Liability, Current	30,262	28,834
Taxes Payable, Current	17,350	8,786
Interest Payable, Current	9,997	8,671
Deferred Fuel Costs Current Liabilities	152	980
Other Liabilities, Current	11,820	14,427
Liabilities, Current, Total	242,757	230,067
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	212,371	201,541
Accumulated Deferred Investment Tax Credit	15,447	15,617
Regulatory Liability For Income Taxes - Net	15,058	15,000
Regulatory Liability, Noncurrent	245,892	260,312
Loss Contingency Accrual	80,137	90,293
Long-Term Debt, Excluding Current Maturities	565,866	650,463
Deferred Credits and Other Liabilities	23,077	56,395
Liabilities, Noncurrent, Total	1,163,712	1,295,485
Commitments and Contingencies
Common Shareholders Equity [Abstract]
Members' Equity	608,405	697,601
Equity, Including Portion Attributable to Noncontrolling Interest, Total	608,405	697,601
Liabilities and Equity, Total	2,014,874	2,223,153
Disposal Group, Including Discontinued Operation, Assets, Current	0	13,100
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	284,738
Entergy New Orleans [Member] | Affiliated Entity [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	19,669	5,844
Liabilities, Current [Abstract]
Notes Payable, Current	1,140	1,140
Accounts Payable, Current	45,195	45,479
Liabilities, Noncurrent [Abstract]
Notes Payable, Noncurrent	5,864	5,864
Entergy New Orleans [Member] | Nonrelated Party [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	78,961	65,731
Liabilities, Current [Abstract]
Accounts Payable, Current	41,841	43,750
Entergy Texas [Member]
Cash and Cash Equivalents [Abstract]
Cash	789	291
Cash Equivalents, at Carrying Value	0	184,706
Cash and Cash Equivalents, at Carrying Value, Total	789	184,997
Other Restricted Assets, Current	9,025	2,703
Accounts Receivable [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	(6,182)	(1,304)
Other Receivables	57,340	43,773
Unbilled Receivables, Current	93,173	74,060
Accounts and Other Receivables, Net, Current	308,804	227,935
Energy Related Inventory	31,372	45,970
Public Utilities, Inventory	170,940	157,241
Prepaid Expense and Other Assets, Current	44,322	34,803
Assets, Current, Total	565,252	653,649
Assets, Noncurrent [Abstract]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	70	107
Other Long-Term Investments	16,183	15,878
Long-Term Investments, Total	16,253	15,985
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	9,150,763	8,628,625
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	2,133,625	1,513,170
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	11,284,388	10,141,795
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	2,715,675	2,548,961
Public Utilities, Property, Plant and Equipment, Net, Total	8,568,713	7,592,834
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	463,505	549,708
Other Assets, Noncurrent	178,675	157,904
Deferred Costs and Other Assets	642,180	707,612
Assets, Total	9,792,398	8,970,080
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	130,000	0
Contract with Customer, Refund Liability, Current	41,411	40,782
Taxes Payable, Current	72,784	76,474
Interest Payable, Current	29,331	38,703
Deferred Fuel Costs Current Liabilities	11,190	59,271
Other Liabilities, Current	19,516	20,836
Liabilities, Current, Total	1,092,568	662,805
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	941,515	868,849
Accumulated Deferred Investment Tax Credit	6,654	7,215
Regulatory Liability For Income Taxes - Net	74,503	93,766
Regulatory Liability, Noncurrent	17,090	18,705
Asset Retirement Obligations, Noncurrent	14,895	17,688
Loss Contingency Accrual	12,637	9,985
Long-Term Debt, Excluding Current Maturities	3,909,013	3,552,443
Deferred Credits and Other Liabilities	105,507	397,412
Liabilities, Noncurrent, Total	5,081,814	4,966,063
Commitments and Contingencies
Common Stock, No Par Value	$ 0	$ 0
Common Shareholders Equity [Abstract]
Preferred Stock, Value, Issued	$ 38,750	$ 38,750
Common Stock, Value, Issued	49,452	49,452
Additional Paid in Capital, Common Stock	1,200,125	1,200,125
Retained Earnings (Accumulated Deficit)	2,329,689	2,052,885
Equity, Attributable to Parent, Total	3,579,266	3,302,462
Equity, Including Portion Attributable to Noncontrolling Interest, Total	3,618,016	3,341,212
Liabilities and Equity, Total	$ 9,792,398	$ 8,970,080
Common Stock, Shares, Issued	46,525,000	46,525,000
Entergy Texas [Member] | Affiliated Entity [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	$ 7,037	$ 26,564
Liabilities, Current [Abstract]
Accounts Payable, Current	210,027	65,335
Entergy Texas [Member] | Nonrelated Party [Member]
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	157,436	84,842
Liabilities, Current [Abstract]
Accounts Payable, Current	578,309	361,404
System Energy [Member]
Cash and Cash Equivalents [Abstract]
Cash	457	448
Cash Equivalents, at Carrying Value	127,330	28,460
Cash and Cash Equivalents, at Carrying Value, Total	127,787	28,908
Accounts Receivable [Abstract]
Accounts Receivable, before Allowance for Credit Loss, Current	82,506	48,134
Other Receivables	5,663	5,425
Accounts and Other Receivables, Net, Current	88,169	53,559
Public Utilities, Inventory	155,500	163,814
Prepaid Expense and Other Assets, Current	6,547	5,768
Deferred Nuclear Refueling Outage Costs	11,602	19,884
Assets, Current, Total	389,605	271,933
Assets, Noncurrent [Abstract]
Decommissioning Fund Investments	1,704,226	1,529,059
Long-Term Investments, Total	1,704,226	1,529,059
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Public Utilities, Property, Plant and Equipment, Electric	5,680,600	5,668,253
Public Utilities, Property, Plant and Equipment, Construction Work in Progress	156,903	85,127
Public Utilities, Property, Plant and Equipment, Fuel	180,277	220,044
Public Utilities, Property, Plant and Equipment, Plant in Service, Total	6,017,780	5,973,424
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation	3,664,527	3,578,709
Public Utilities, Property, Plant and Equipment, Net, Total	2,353,253	2,394,715
Regulatory Asset [Abstract]
Regulatory Asset, Noncurrent	430,813	426,494
Other Assets, Noncurrent	25,107	20,273
Deferred Costs and Other Assets	455,920	446,767
Assets, Total	4,903,004	4,642,474
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	140	200,090
Taxes Payable, Current	9,465	15,852
Interest Payable, Current	20,875	13,342
Other Liabilities, Current	4,475	4,473
Liabilities, Current, Total	78,780	297,251
Liabilities, Noncurrent [Abstract]
Deferred Income Taxes and Other Tax Liabilities, Noncurrent	585,667	451,830
Accumulated Deferred Investment Tax Credit	41,874	42,984
Regulatory Liability For Income Taxes - Net	100,919	105,467
Regulatory Liability, Noncurrent	883,655	747,190
Asset Retirement Obligations, Noncurrent	1,161,483	1,127,712
Long-Term Debt, Excluding Current Maturities	1,090,622	889,646
Deferred Credits and Other Liabilities	1,980	8,355
Liabilities, Noncurrent, Total	3,866,200	3,373,184
Commitments and Contingencies
Common Stock, No Par Value	$ 0	$ 0
Common Shareholders Equity [Abstract]
Common Stock, Value, Issued	$ 908,944	$ 958,944
Retained Earnings (Accumulated Deficit)	49,080	13,095
Equity, Including Portion Attributable to Noncontrolling Interest, Total	958,024	972,039
Liabilities and Equity, Total	$ 4,903,004	$ 4,642,474
Common Stock, Shares, Issued	789,350	789,350
System Energy [Member] | Affiliated Entity [Member]
Liabilities, Current [Abstract]
Accounts Payable, Current	$ 17,832	$ 18,477
System Energy [Member] | Nonrelated Party [Member]
Liabilities, Current [Abstract]
Accounts Payable, Current	$ 25,993	$ 45,017