Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 390,805	$ 362,422
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	654,669	622,566
Deferred Income Taxes and Tax Credits	86,073	94,973
Asset Impairment Charges	18,059	0
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	65,110	51,477
Increase (Decrease) in Fuel Inventories	2,187	3,261
Increase (Decrease) in Accounts Payable	26,198	(189,497)
Increase (Decrease) in Accrued Taxes Payable	(109,734)	(95,589)
Increase (Decrease) in Interest Payable, Net	47,247	11,595
Increase (Decrease) in Deferred Fuel Costs	(308,610)	(277,236)
Increase (Decrease) in Customer advances in aid of construction - current	251,591	105,799
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(116,674)	5,506
Provision for Other Losses	(32,692)	(34,239)
Increase (Decrease) in Other Regulatory Assets	115,232	154,818
Increase (Decrease) in Regulatory Liabilities	(384,331)	(201,803)
Increase (Decrease) in Customer advances in aid of construction - non-current	117,198	25,000
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(59,013)	(58,834)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	65,649	(44,031)
Net Cash Provided by (Used in) Operating Activities, Total	828,964	536,188
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	2,252,293	1,660,169
Allowance for Funds Used During Construction, Investing Activities	47,340	44,018
Payments for Nuclear Fuel	(150,738)	(88,557)
Payments for (Proceeds from) Productive Assets	0	1,282
Proceeds from Decommissioning Trust Fund Assets	945,975	364,837
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(985,748)	(407,146)
Changes in securitization account	(5,727)	(5,438)
Payments to storm reserve escrow accounts	2,767	4,448
Receipts from storm reserve escrow accounts	0	43,789
Decrease (increase) in other investments	17,929	(472)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	3,546
Net Cash Provided by (Used in) Investing Activities, Total	(2,421,887)	(1,710,378)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(3,681,682)	(2,447,850)
Proceeds from Sale of Treasury Stock	6,592	22,660
Proceeds from Issuance of Common Stock	345,711	0
Repayments of Long-Term Debt	(1,290,977)	(852,754)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(292,867)	(258,249)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	4,580	4,580
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	261,711	211,459
Payment for Advance for Construction, Financing Activity	(190,902)	(149,543)
Proceeds from (Repayments of) Short-Term Debt	724,580	402,694
Proceeds from (Payment for) Other Financing Activity	(5,890)	8,360
Net Cash Provided by (Used in) Financing Activities, Total	3,235,060	1,827,897
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	1,642,137	653,707
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	3,571,053	1,513,410
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	287,389	326,519
Income Taxes Paid, Net	(423)	(1,252)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	657,112	657,132
Entergy Arkansas [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	82,701	86,523
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	167,930	159,997
Deferred Income Taxes and Tax Credits	46,054	38,647
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	59,806	20,884
Increase (Decrease) in Fuel Inventories	(19,592)	(6,636)
Increase (Decrease) in Accounts Payable	3,209	(10,943)
Increase (Decrease) in Accrued Taxes Payable	(6,965)	(1,370)
Increase (Decrease) in Interest Payable, Net	32,071	25,947
Increase (Decrease) in Deferred Fuel Costs	(82,715)	(42,248)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(22,568)	(1,447)
Provision for Other Losses	(3,736)	4,441
Increase (Decrease) in Other Regulatory Assets	96,686	10,149
Increase (Decrease) in Regulatory Liabilities	(146,228)	(47,940)
Increase (Decrease) in Customer advances in aid of construction - non-current	48,700	0
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(10,809)	(13,269)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	17,737	34,442
Net Cash Provided by (Used in) Operating Activities, Total	262,281	257,177
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	342,184	156,345
Allowance for Funds Used During Construction, Investing Activities	5,122	4,262
Payments for Nuclear Fuel	(88,616)	(28,000)
Payments for (Proceeds from) Productive Assets	0	1,282
Proceeds from Nuclear Fuel	38,369	40,260
Change in money pool receivable - net	(21,199)	(9,608)
Payment for (Proceeds from) Other Investing Activity	0	51
Proceeds from Decommissioning Trust Fund Assets	308,682	23,272
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(318,387)	(33,721)
Payment for (Proceeds from) Other Investing Activity	0	(51)
Net Cash Provided by (Used in) Investing Activities, Total	(418,213)	(161,111)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(1,147,175)	(17,607)
Repayments of Long-Term Debt	(715,606)	(34,905)
Change in money pool payable - net	0	(15,190)
Dividends Paid [Abstract]
Proceeds from (Payment for) Other Financing Activity	26,278	(13,265)
Net Cash Provided by (Used in) Financing Activities, Total	457,847	(45,753)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	301,915	50,313
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	577,485	55,060
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	23,891	31,134
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	73,826	51,028
Entergy Louisiana [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	275,900	254,197
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	259,020	235,886
Deferred Income Taxes and Tax Credits	133,607	154,018
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(121)	(30,919)
Increase (Decrease) in Fuel Inventories	13,072	2,458
Increase (Decrease) in Accounts Payable	(22,965)	(15,853)
Increase (Decrease) in Accrued Taxes Payable	(21,967)	(57,828)
Increase (Decrease) in Interest Payable, Net	(56,328)	(47,251)
Increase (Decrease) in Deferred Fuel Costs	(131,148)	(120,941)
Increase (Decrease) in Customer advances in aid of construction - current	65,593	(695)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(102,939)	(5,993)
Provision for Other Losses	5,427	(25,824)
Increase (Decrease) in Other Regulatory Assets	(55,645)	65,140
Increase (Decrease) in Regulatory Liabilities	(124,355)	(101,039)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(9,506)	(10,612)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	78,637	(21,609)
Net Cash Provided by (Used in) Operating Activities, Total	306,282	273,135
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	1,003,431	658,846
Allowance for Funds Used During Construction, Investing Activities	20,076	15,206
Proceeds from Sale of Productive Assets	0	366
Payments for Nuclear Fuel	(61,625)	(112,379)
Proceeds from Nuclear Fuel	67,461	0
Change in money pool receivable - net	(31,405)	(39,137)
Redemption of preferred membership interests of affiliate	91,126	88,022
Proceeds from Decommissioning Trust Fund Assets	290,292	158,694
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(310,645)	(178,871)
Payments to storm reserve escrow accounts	2,109	2,728
Receipts from storm reserve escrow accounts	0	33,456
Decrease (increase) in other investments	8,225	0
Net Cash Provided by (Used in) Investing Activities, Total	(948,485)	(696,217)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(1,688,840)	(1,088,338)
Repayments of Long-Term Debt	(478,010)	(551,009)
Dividends Paid [Abstract]
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	17,298	49,831
Payment for Advance for Construction, Financing Activity	(121,451)	(60,339)
Proceeds from (Payment for) Other Financing Activity	(2,425)	(2,346)
Net Cash Provided by (Used in) Financing Activities, Total	1,104,252	488,225
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	462,049	65,143
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	1,239,010	392,245
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	159,548	166,286
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	338,745	251,166
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	0	(36,250)
Entergy Mississippi [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	84,318	46,866
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	69,159	67,984
Deferred Income Taxes and Tax Credits	2,574	(42,852)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(6,068)	12,853
Increase (Decrease) in Fuel Inventories	4,036	2,142
Increase (Decrease) in Accounts Payable	56,557	(33,483)
Increase (Decrease) in Accrued Taxes Payable	(92,119)	(45,531)
Increase (Decrease) in Interest Payable, Net	25,727	16,507
Increase (Decrease) in Deferred Fuel Costs	(49,848)	(46,363)
Increase (Decrease) in Customer advances in aid of construction - current	185,998	106,494
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(19,064)	(30,794)
Provision for Other Losses	(30,836)	(2,411)
Increase (Decrease) in Other Regulatory Assets	(8,477)	38,417
Increase (Decrease) in Regulatory Liabilities	6,148	11,034
Increase (Decrease) in Customer advances in aid of construction - non-current	68,498	25,000
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(2,764)	(3,654)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	44,862	(2,104)
Net Cash Provided by (Used in) Operating Activities, Total	338,701	120,105
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	538,591	342,980
Allowance for Funds Used During Construction, Investing Activities	856	5,270
Change in money pool receivable - net	(55,330)	(94,314)
Decrease (increase) in other investments	(129)	40
Net Cash Provided by (Used in) Investing Activities, Total	(592,936)	(432,064)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(644,286)	(593,201)
Proceeds from Contributions from Parent	198,000	62,500
Dividends Paid [Abstract]
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	187,874	149,732
Payment for Advance for Construction, Financing Activity	(33,561)	(50,322)
Proceeds from (Payment for) Other Financing Activity	(818)	(688)
Net Cash Provided by (Used in) Financing Activities, Total	995,781	754,423
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	741,546	442,464
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	1,083,030	598,157
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	10,685	19,084
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	108,043	129,085
Entergy New Orleans [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6,384	12,099
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	18,996	21,845
Deferred Income Taxes and Tax Credits	(5,989)	(31,821)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	6,906	10,089
Increase (Decrease) in Fuel Inventories	(415)	156
Increase (Decrease) in Accounts Payable	(2,026)	(10,252)
Increase (Decrease) in Accrued Taxes Payable	6,729	35,139
Increase (Decrease) in Interest Payable, Net	1,975	2,436
Increase (Decrease) in Deferred Fuel Costs	(12,647)	(10,659)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(14,133)	(12,165)
Provision for Other Losses	421	(10,339)
Increase (Decrease) in Other Regulatory Assets	1,061	6,058
Increase (Decrease) in Regulatory Liabilities	(7,449)	(11,514)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(2,443)	(2,637)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	(1,052)	4,154
Net Cash Provided by (Used in) Operating Activities, Total	(3,682)	2,589
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	35,877	32,915
Allowance for Funds Used During Construction, Investing Activities	574	306
Change in money pool receivable - net	3,730	597
Payment for (Proceeds from) Other Investing Activity	(5,000)	0
Changes in securitization account	0	698
Payments to storm reserve escrow accounts	658	870
Receipts from storm reserve escrow accounts	0	10,333
Payment for (Proceeds from) Other Investing Activity	5,000	0
Net Cash Provided by (Used in) Investing Activities, Total	(37,231)	(21,851)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	0	(79,717)
Repayments of Long-Term Debt	0	(78,000)
Dividends Paid [Abstract]
Proceeds from (Payment for) Other Financing Activity	(381)	(306)
Net Cash Provided by (Used in) Financing Activities, Total	(381)	1,411
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(41,294)	(17,851)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	68,970	13,926
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	4,403	10,795
Income Taxes Paid, Net	150	0
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	7,568	3,550
Entergy Texas [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	73,435	66,856
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	80,184	80,680
Deferred Income Taxes and Tax Credits	(27,446)	7,183
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	16,926	23,273
Increase (Decrease) in Fuel Inventories	4,010	5,551
Increase (Decrease) in Accounts Payable	(20,544)	12,130
Increase (Decrease) in Accrued Taxes Payable	(4,608)	(39,088)
Increase (Decrease) in Interest Payable, Net	(16,975)	(22,416)
Increase (Decrease) in Deferred Fuel Costs	(32,253)	(57,024)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	5,812	19
Provision for Other Losses	(958)	(560)
Increase (Decrease) in Other Regulatory Assets	14,970	27,907
Increase (Decrease) in Regulatory Liabilities	10,558	(6,314)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(4,323)	(4,037)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	(28,372)	(32,366)
Net Cash Provided by (Used in) Operating Activities, Total	70,416	61,794
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	270,430	416,045
Allowance for Funds Used During Construction, Investing Activities	18,445	17,372
Change in money pool receivable - net	(10,749)	(36,177)
Changes in securitization account	(5,727)	(6,135)
Net Cash Provided by (Used in) Investing Activities, Total	(268,461)	(440,985)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	0	(494,300)
Proceeds from Contributions from Parent	365,000	0
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	518	518
Proceeds from (Payment for) Other Financing Activity	(7,581)	(1,453)
Net Cash Provided by (Used in) Financing Activities, Total	356,901	492,329
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	158,856	113,138
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	433,964	298,135
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	57,644	64,646
Income Taxes Paid, Net	(793)	0
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	62,732	198,271
System Energy [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	23,016	23,389
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	49,861	54,649
Deferred Income Taxes and Tax Credits	2,691	2,480
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	28,910	(5,944)
Increase (Decrease) in Accounts Payable	22,269	(23,848)
Increase (Decrease) in Accrued Taxes Payable	(12,689)	(11,689)
Increase (Decrease) in Interest Payable, Net	8,634	5,517
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(32,523)	963
Increase (Decrease) in Other Regulatory Assets	62,426	2,695
Increase (Decrease) in Regulatory Liabilities	(123,005)	(45,323)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(3,616)	(3,799)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	42,523	46,074
Net Cash Provided by (Used in) Operating Activities, Total	68,497	45,164
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	59,004	26,431
Allowance for Funds Used During Construction, Investing Activities	2,268	1,603
Payments for Nuclear Fuel	(121,533)	(20,123)
Proceeds from Nuclear Fuel	15,206	31,686
Change in money pool receivable - net	0	2,408
Proceeds from Decommissioning Trust Fund Assets	347,000	182,871
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(356,714)	(194,554)
Net Cash Provided by (Used in) Investing Activities, Total	(172,777)	(22,540)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(202,144)	(174,877)
Repayments of Long-Term Debt	(97,362)	(188,840)
Change in money pool payable - net	(414)	0
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	0	(35,000)
Proceeds from (Payment for) Other Financing Activity	(22)	0
Net Cash Provided by (Used in) Financing Activities, Total	104,346	(48,963)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	66	(26,339)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	122	2,569
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	8,594	10,378
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 45,791	$ 5,424