Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 362,422	$ 76,536
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	622,566	600,412
Deferred Income Taxes and Tax Credits	94,973	(20,656)
Asset Impairment Charges	0	131,775
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	51,477	107,921
Increase (Decrease) in Fuel Inventories	3,261	5,387
Increase (Decrease) in Accounts Payable	(189,497)	(287,418)
Increase (Decrease) in Accrued Taxes Payable	(95,589)	(64,085)
Increase (Decrease) in Interest Payable, Net	11,595	29,615
Increase (Decrease) in Deferred Fuel Costs	(277,236)	92,685
Increase (Decrease) in Other Operating Assets and Liabilities, Net	111,305	(73,315)
Provision for Other Losses	(34,239)	9,283
Increase (Decrease) in Other Regulatory Assets	154,818	237,098
Increase (Decrease) in Regulatory Liabilities	(201,803)	205,587
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(58,834)	(76,343)
Other Operating Activities, Cash Flow Statement	(19,031)	(453,390)
Net Cash Provided by (Used in) Operating Activities, Total	536,188	521,092
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	1,660,169	961,152
Allowance for Funds Used During Construction, Investing Activities	44,018	26,794
Payments for Nuclear Fuel	(88,557)	(133,315)
Payments for (Proceeds from) Productive Assets	1,282	172,614
Payments for (Proceeds from) Other Investing Activities	472	(1,562)
Proceeds from Decommissioning Trust Fund Assets	364,837	489,417
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(407,146)	(521,237)
Changes in securitization account	(5,438)	(8,934)
Payments to storm reserve escrow accounts	4,448	5,269
Receipts from storm reserve escrow accounts	43,789	0
Payments for (Proceeds from) Other Investing Activities	(472)	1,562
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	3,546	0
Net Cash Provided by (Used in) Investing Activities, Total	(1,710,378)	(1,287,872)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(2,447,850)	(2,206,338)
Proceeds from Sale of Treasury Stock	22,660	6,759
Repayments of Long-Term Debt	(852,754)	(835,740)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(258,249)	(240,959)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	4,580	4,580
Proceeds from (Payments for) Other Financing Activities	70,276	21,940
Proceeds from (Repayments of) Short-Term Debt	402,694	775,333
Net Cash Provided by (Used in) Financing Activities, Total	1,827,897	1,929,091
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	653,707	1,162,311
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	1,513,410	1,294,859	$ 859,703	$ 132,548
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	326,519	237,931
Income Taxes Paid, Net	(1,252)	(316)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	657,132	509,046
Entergy Arkansas [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	86,523	(32,280)
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	159,997	144,309
Deferred Income Taxes and Tax Credits	38,647	8,754
Asset Impairment Charges	0	131,775
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	20,884	27,640
Increase (Decrease) in Fuel Inventories	(6,636)	(289)
Increase (Decrease) in Accounts Payable	(10,943)	(36,137)
Increase (Decrease) in Accrued Taxes Payable	(1,370)	4,735
Increase (Decrease) in Interest Payable, Net	25,947	16,868
Increase (Decrease) in Deferred Fuel Costs	(42,248)	18,179
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(1,447)	13,059
Provision for Other Losses	4,441	4,387
Increase (Decrease) in Other Regulatory Assets	10,149	197,825
Increase (Decrease) in Regulatory Liabilities	(47,940)	21,357
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(13,269)	(15,541)
Other Operating Activities, Cash Flow Statement	34,442	(217,390)
Net Cash Provided by (Used in) Operating Activities, Total	257,177	287,251
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	156,345	180,227
Allowance for Funds Used During Construction, Investing Activities	4,262	5,532
Payments for Nuclear Fuel	(28,000)	(44,445)
Payments for (Proceeds from) Productive Assets	1,282	169,694
Proceeds from Nuclear Fuel	40,260	33,213
Change in money pool receivable - net	(9,608)	(8,505)
Payments for (Proceeds from) Other Investing Activities	51	30
Proceeds from Decommissioning Trust Fund Assets	23,272	204,049
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(33,721)	(211,342)
Payments for (Proceeds from) Other Investing Activities	(51)	(30)
Net Cash Provided by (Used in) Investing Activities, Total	(161,111)	(371,389)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(17,607)	(179,937)
Repayments of Long-Term Debt	(34,905)	(180,405)
Proceeds from Contributions from Parent	0	275,000
Change in money pool payable - net	(15,190)	(145,385)
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	(13,265)	(3,074)
Net Cash Provided by (Used in) Financing Activities, Total	(45,753)	126,073
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	50,313	41,935
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	55,060	45,567	4,747	3,632
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	31,134	31,793
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	51,028	35,791
Entergy Louisiana [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	254,197	182,723
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	235,886	226,874
Deferred Income Taxes and Tax Credits	154,018	126,334
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(30,919)	39,860
Increase (Decrease) in Fuel Inventories	2,458	4,236
Increase (Decrease) in Accounts Payable	(15,853)	(109,430)
Increase (Decrease) in Accrued Taxes Payable	(57,828)	(26,684)
Increase (Decrease) in Interest Payable, Net	(47,251)	(9,995)
Increase (Decrease) in Deferred Fuel Costs	(120,941)	6,940
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(6,688)	(101,798)
Provision for Other Losses	(25,824)	5,497
Increase (Decrease) in Other Regulatory Assets	65,140	11,834
Increase (Decrease) in Regulatory Liabilities	(101,039)	51,414
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(10,612)	(12,466)
Other Operating Activities, Cash Flow Statement	(21,609)	(90,503)
Net Cash Provided by (Used in) Operating Activities, Total	273,135	304,836
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	658,846	327,980
Allowance for Funds Used During Construction, Investing Activities	15,206	7,285
Proceeds from Sale of Productive Assets	366	0
Payments for Nuclear Fuel	(112,379)	(48,914)
Proceeds from Nuclear Fuel	0	38,790
Change in money pool receivable - net	(39,137)	(218,098)
Redemption of preferred membership interests of affiliate	88,022	85,027
Payments for (Proceeds from) Other Investing Activities	0	35
Proceeds from Decommissioning Trust Fund Assets	158,694	149,334
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(178,871)	(166,123)
Payments to storm reserve escrow accounts	2,728	3,299
Receipts from storm reserve escrow accounts	33,456	0
Payments for (Proceeds from) Other Investing Activities	0	(35)
Net Cash Provided by (Used in) Investing Activities, Total	(696,217)	(483,943)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(1,088,338)	(1,693,150)
Repayments of Long-Term Debt	(551,009)	(513,009)
Change in money pool payable - net	0	(156,166)
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	(12,854)	23,059
Net Cash Provided by (Used in) Financing Activities, Total	488,225	949,534
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	65,143	770,427
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	392,245	773,199	327,102	2,772
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	166,286	105,176
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	251,166	84,035
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	(36,250)	(97,500)
Entergy Mississippi [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	46,866	27,432
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	67,984	65,917
Deferred Income Taxes and Tax Credits	(42,852)	(9,162)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	12,853	36,151
Increase (Decrease) in Fuel Inventories	2,142	(1,012)
Increase (Decrease) in Accounts Payable	(33,483)	(15,691)
Increase (Decrease) in Accrued Taxes Payable	(45,531)	(75,046)
Increase (Decrease) in Interest Payable, Net	16,507	5,960
Increase (Decrease) in Deferred Fuel Costs	(46,363)	28,337
Increase (Decrease) in Other Operating Assets and Liabilities, Net	75,700	(6,853)
Provision for Other Losses	(2,411)	(977)
Increase (Decrease) in Other Regulatory Assets	38,417	(3,166)
Increase (Decrease) in Regulatory Liabilities	11,034	(2,701)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(3,654)	(6,014)
Other Operating Activities, Cash Flow Statement	22,896	(8,774)
Net Cash Provided by (Used in) Operating Activities, Total	120,105	34,401
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	342,980	114,260
Allowance for Funds Used During Construction, Investing Activities	5,270	1,918
Change in money pool receivable - net	(94,314)	0
Payments for (Proceeds from) Other Investing Activities	(40)	(94)
Payments for (Proceeds from) Other Investing Activities	40	94
Net Cash Provided by (Used in) Investing Activities, Total	(432,064)	(112,436)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(593,201)	(99,860)
Proceeds from Contributions from Parent	62,500	0
Change in money pool payable - net	0	(17,549)
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	98,722	(8,781)
Net Cash Provided by (Used in) Financing Activities, Total	754,423	73,530
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	442,464	(4,505)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	598,157	2,125	155,693	6,630
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	19,084	19,838
Income Taxes Paid, Net	0	2,353
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	129,085	43,943
Entergy New Orleans [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	12,099	(48,980)
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	21,845	20,914
Deferred Income Taxes and Tax Credits	(31,821)	(25,534)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	10,089	(89,009)
Increase (Decrease) in Fuel Inventories	156	638
Increase (Decrease) in Accounts Payable	(10,252)	(19,282)
Increase (Decrease) in Accrued Taxes Payable	35,139	8,632
Increase (Decrease) in Interest Payable, Net	2,436	1,132
Increase (Decrease) in Deferred Fuel Costs	(10,659)	369
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(12,165)	(10,924)
Provision for Other Losses	(10,339)	1,758
Increase (Decrease) in Other Regulatory Assets	6,058	9,257
Increase (Decrease) in Regulatory Liabilities	(11,514)	166,532
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(2,637)	(1,896)
Other Operating Activities, Cash Flow Statement	4,154	(4,468)
Net Cash Provided by (Used in) Operating Activities, Total	2,589	9,139
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	32,915	32,418
Allowance for Funds Used During Construction, Investing Activities	306	378
Change in money pool receivable - net	597	0
Changes in securitization account	698	(2,976)
Payments to storm reserve escrow accounts	870	1,877
Receipts from storm reserve escrow accounts	10,333	0
Net Cash Provided by (Used in) Investing Activities, Total	(21,851)	(36,893)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(79,717)	0
Repayments of Long-Term Debt	(78,000)	0
Change in money pool payable - net	0	28,125
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	(306)	(371)
Net Cash Provided by (Used in) Financing Activities, Total	1,411	27,754
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(17,851)	0
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	13,926	26	31,777	26
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	10,795	8,047
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	3,550	4,941
Entergy Texas [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	66,856	36,744
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	80,680	89,505
Deferred Income Taxes and Tax Credits	7,183	1,438
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	23,273	13,059
Increase (Decrease) in Fuel Inventories	5,551	1,009
Increase (Decrease) in Accounts Payable	12,130	(17,830)
Increase (Decrease) in Accrued Taxes Payable	(39,088)	(28,917)
Increase (Decrease) in Interest Payable, Net	(22,416)	5,287
Increase (Decrease) in Deferred Fuel Costs	(57,024)	38,863
Increase (Decrease) in Other Operating Assets and Liabilities, Net	19	(11,186)
Provision for Other Losses	(560)	(1,358)
Increase (Decrease) in Other Regulatory Assets	27,907	24,181
Increase (Decrease) in Regulatory Liabilities	(6,314)	(7,959)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(4,037)	(4,648)
Other Operating Activities, Cash Flow Statement	(32,366)	(27,281)
Net Cash Provided by (Used in) Operating Activities, Total	61,794	110,907
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	416,045	235,625
Allowance for Funds Used During Construction, Investing Activities	17,372	9,248
Change in money pool receivable - net	(36,177)	267,638
Payments for (Proceeds from) Other Investing Activities	0	(1,000)
Changes in securitization account	(6,135)	(5,958)
Payments for (Proceeds from) Other Investing Activities	0	1,000
Net Cash Provided by (Used in) Investing Activities, Total	(440,985)	34,303
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(494,300)	0
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	518	518
Proceeds from (Payments for) Other Financing Activities	(1,453)	11,258
Net Cash Provided by (Used in) Financing Activities, Total	492,329	10,740
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	113,138	155,950
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	298,135	177,936	184,997	21,986
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	64,646	25,940
Income Taxes Paid, Net	0	2,447
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	198,271	276,548
System Energy [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	23,389	31,118
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	54,649	51,714
Deferred Income Taxes and Tax Credits	2,480	11,452
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(5,944)	8,832
Increase (Decrease) in Accounts Payable	(23,848)	116,460
Increase (Decrease) in Accrued Taxes Payable	(11,689)	(14,091)
Increase (Decrease) in Interest Payable, Net	5,517	883
Increase (Decrease) in Other Operating Assets and Liabilities, Net	963	(25,431)
Increase (Decrease) in Other Regulatory Assets	2,695	(5,358)
Increase (Decrease) in Regulatory Liabilities	(45,323)	(23,057)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(3,799)	(3,806)
Other Operating Activities, Cash Flow Statement	46,074	(78,377)
Net Cash Provided by (Used in) Operating Activities, Total	45,164	70,339
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	26,431	39,563
Allowance for Funds Used During Construction, Investing Activities	1,603	2,434
Payments for Nuclear Fuel	(20,123)	(111,959)
Proceeds from Nuclear Fuel	31,686	0
Change in money pool receivable - net	2,408	(31,456)
Payments for (Proceeds from) Other Investing Activities	0	23
Proceeds from Decommissioning Trust Fund Assets	182,871	136,035
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(194,554)	(143,773)
Payments for (Proceeds from) Other Investing Activities	0	(23)
Net Cash Provided by (Used in) Investing Activities, Total	(22,540)	(188,259)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(174,877)	(233,933)
Repayments of Long-Term Debt	(188,840)	(142,326)
Proceeds from Contributions from Parent	0	150,000
Change in money pool payable - net	0	(12,246)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(35,000)	0
Net Cash Provided by (Used in) Financing Activities, Total	(48,963)	229,361
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(26,339)	111,441
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	2,569	111,501	$ 28,908	$ 60
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	10,378	10,357
Income Taxes Paid, Net	0	(2,326)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 5,424	$ 48,856