Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 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	$ 834,376	$ 128,268
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	1,255,204	1,206,492
Deferred Income Taxes and Tax Credits	231,274	15,998
Asset Impairment Charges	0	131,775
Pension Expense (Reversal of Expense), Noncash	0	316,738
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(275,045)	(187,554)
Increase (Decrease) in Fuel Inventories	(4,852)	18,324
Increase (Decrease) in Accounts Payable	(53,439)	(149,554)
Increase (Decrease) in Accrued Taxes Payable	11,230	16,546
Increase (Decrease) in Interest Payable, Net	22,867	23,560
Increase (Decrease) in Deferred Fuel Costs	(263,205)	134,953
Increase (Decrease) in Other Operating Assets and Liabilities, Net	244,972	(120,277)
Provision for Other Losses	(38,444)	4,630
Increase (Decrease) in Other Regulatory Assets	174,523	260,722
Increase (Decrease) in Regulatory Liabilities	20,040	380,394
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(104,968)	(131,539)
Other Operating Activities, Cash Flow Statement	(256,743)	(503,020)
Net Cash Provided by (Used in) Operating Activities, Total	1,797,790	1,546,456
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	3,668,326	2,124,279
Allowance for Funds Used During Construction, Investing Activities	83,161	56,070
Payments for Nuclear Fuel	(129,124)	(161,483)
Payments for (Proceeds from) Productive Assets	1,608	172,614
Payments for (Proceeds from) Other Investing Activities	(1,659)	(9,689)
Proceeds from Decommissioning Trust Fund Assets	713,102	1,201,162
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(780,211)	(1,250,039)
Changes in securitization account	3,309	3,976
Payments to storm reserve escrow accounts	6,808	9,595
Receipts from storm reserve escrow accounts	43,789	0
Payments for (Proceeds from) Other Investing Activities	1,659	9,689
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	3,546	0
Net Cash Provided by (Used in) Investing Activities, Total	(3,740,829)	(2,466,491)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(3,517,949)	(5,068,266)
Proceeds from Sale of Treasury Stock	24,539	45,982
Proceeds from Issuance of Common Stock	804,631	0
Repayments of Long-Term Debt	(1,599,728)	(2,379,903)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(516,716)	(482,255)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	9,159	9,159
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	732,454	192,426
Payment for Advance for Construction, Financing Activity	(245,481)	(76,768)
Proceeds from (Repayments of) Short-Term Debt	(451,686)	(205,820)
Proceeds from (Payments for) Other Financing Activities	2,164	(10,118)
Net Cash Provided by (Used in) Financing Activities, Total	2,258,967	2,142,651
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	315,928	1,222,616
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	1,175,631	1,355,164	$ 859,703	$ 132,548
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	647,900	532,742
Income Taxes Paid, Net	2,487	7,822
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	576,992	537,463
Entergy Arkansas [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	185,716	63,079
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	324,540	287,564
Deferred Income Taxes and Tax Credits	65,494	41,130
Asset Impairment Charges	0	131,775
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(63,276)	67,067
Increase (Decrease) in Fuel Inventories	(14,868)	10,890
Increase (Decrease) in Accounts Payable	43,551	26,093
Increase (Decrease) in Accrued Taxes Payable	(19,741)	(15,496)
Increase (Decrease) in Interest Payable, Net	69	4,647
Increase (Decrease) in Deferred Fuel Costs	(33,234)	2,317
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(25,426)	(13,243)
Provision for Other Losses	(2,436)	5,725
Increase (Decrease) in Other Regulatory Assets	(4,658)	179,719
Increase (Decrease) in Regulatory Liabilities	65,970	71,529
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(20,651)	(27,588)
Other Operating Activities, Cash Flow Statement	(63,163)	(310,500)
Net Cash Provided by (Used in) Operating Activities, Total	437,887	524,708
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	400,384	394,973
Allowance for Funds Used During Construction, Investing Activities	9,617	11,394
Payments for Nuclear Fuel	(73,283)	(65,010)
Payments for (Proceeds from) Productive Assets	1,608	169,694
Proceeds from Nuclear Fuel	40,601	33,213
Change in money pool receivable - net	(49,019)	(130,602)
Payments for (Proceeds from) Other Investing Activities	51	30
Proceeds from Decommissioning Trust Fund Assets	51,462	412,931
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(70,616)	(418,818)
Payments for (Proceeds from) Other Investing Activities	(51)	(30)
Net Cash Provided by (Used in) Investing Activities, Total	(493,179)	(721,529)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(350,312)	(970,030)
Repayments of Long-Term Debt	(40,311)	(555,411)
Proceeds from Contributions from Parent	0	695,000
Change in money pool payable - net	(15,190)	(145,385)
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	(17,278)	15,287
Net Cash Provided by (Used in) Financing Activities, Total	277,533	979,521
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	222,241	782,700
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	226,988	786,332	4,747	3,632
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	115,404	49,597
Income Taxes Paid, Net	0	1,569
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	77,169	36,355
Entergy Louisiana [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	554,377	313,837
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	474,334	453,888
Deferred Income Taxes and Tax Credits	225,635	146,540
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(122,848)	(161,001)
Increase (Decrease) in Fuel Inventories	8,300	6,890
Increase (Decrease) in Accounts Payable	9,253	(1,443)
Increase (Decrease) in Accrued Taxes Payable	(790)	27,677
Increase (Decrease) in Interest Payable, Net	10,430	14,163
Increase (Decrease) in Deferred Fuel Costs	(92,390)	11,364
Increase (Decrease) in Other Operating Assets and Liabilities, Net	77,581	(190,407)
Provision for Other Losses	(23,918)	9,519
Increase (Decrease) in Other Regulatory Assets	48,355	(9,005)
Increase (Decrease) in Regulatory Liabilities	(70,161)	286,036
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(18,124)	(22,548)
Other Operating Activities, Cash Flow Statement	(101,335)	(77,112)
Net Cash Provided by (Used in) Operating Activities, Total	978,699	808,398
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	1,450,693	685,206
Allowance for Funds Used During Construction, Investing Activities	26,560	14,807
Proceeds from Sale of Productive Assets	366	0
Payments for Nuclear Fuel	(130,279)	(52,992)
Proceeds from Nuclear Fuel	17,240	38,822
Change in money pool receivable - net	(48,540)	(31,361)
Redemption of preferred membership interests of affiliate	118,805	113,942
Payments for (Proceeds from) Other Investing Activities	0	33
Proceeds from Decommissioning Trust Fund Assets	291,901	333,149
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(321,342)	(363,736)
Payments to storm reserve escrow accounts	5,144	6,553
Receipts from storm reserve escrow accounts	33,456	0
Payments for (Proceeds from) Other Investing Activities	0	(33)
Net Cash Provided by (Used in) Investing Activities, Total	(1,467,670)	(639,095)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(1,465,747)	(1,825,954)
Repayments of Long-Term Debt	(936,318)	(1,061,918)
Change in money pool payable - net	0	(156,166)
Dividends Paid [Abstract]
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	548,476	113,712
Payment for Advance for Construction, Financing Activity	(117,339)	(39,888)
Proceeds from (Payments for) Other Financing Activities	(4,247)	(3,888)
Net Cash Provided by (Used in) Financing Activities, Total	461,319	13,706
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(27,652)	183,009
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	299,450	185,781	327,102	2,772
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	222,889	177,455
Income Taxes Paid, Net	0	58
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	258,408	81,177
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	(495,000)	(664,100)
Entergy Mississippi [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	131,138	106,997
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	136,462	133,048
Deferred Income Taxes and Tax Credits	(19,714)	24,931
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(41,738)	(26,254)
Increase (Decrease) in Fuel Inventories	(4,855)	(2,331)
Increase (Decrease) in Accounts Payable	(9,305)	475
Increase (Decrease) in Accrued Taxes Payable	(3,929)	(48,627)
Increase (Decrease) in Interest Payable, Net	9,125	(1,845)
Increase (Decrease) in Deferred Fuel Costs	(64,303)	41,104
Increase (Decrease) in Other Operating Assets and Liabilities, Net	85,185	(18,367)
Provision for Other Losses	(3,962)	(11,575)
Increase (Decrease) in Other Regulatory Assets	52,132	5,325
Increase (Decrease) in Regulatory Liabilities	(1,066)	(3,415)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(6,261)	(8,968)
Other Operating Activities, Cash Flow Statement	28,104	(5,194)
Net Cash Provided by (Used in) Operating Activities, Total	287,013	185,304
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	703,400	319,053
Allowance for Funds Used During Construction, Investing Activities	5,365	5,012
Change in money pool receivable - net	(93,459)	0
Payments for (Proceeds from) Other Investing Activities	46	(104)
Payments for (Proceeds from) Other Investing Activities	(46)	104
Net Cash Provided by (Used in) Investing Activities, Total	(791,448)	(314,145)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(592,679)	(396,105)
Repayments of Long-Term Debt	0	(200,000)
Proceeds from Contributions from Parent	62,500	0
Change in money pool payable - net	0	(33,414)
Dividends Paid [Abstract]
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	155,594	4,290
Payment for Advance for Construction, Financing Activity	(59,271)	(18,080)
Proceeds from (Payments for) Other Financing Activities	(1,394)	(1,277)
Net Cash Provided by (Used in) Financing Activities, Total	750,108	125,324
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	245,673	(3,517)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	401,366	3,113	155,693	6,630
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	62,373	55,538
Income Taxes Paid, Net	0	2,356
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	78,363	22,334
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	0	(22,300)
Entergy New Orleans [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	30,141	(27,847)
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	44,203	42,044
Deferred Income Taxes and Tax Credits	(9,350)	(19,560)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(22,585)	(111,913)
Increase (Decrease) in Fuel Inventories	(1,188)	544
Increase (Decrease) in Accounts Payable	(5,661)	(10,311)
Increase (Decrease) in Accrued Taxes Payable	19,556	7,345
Increase (Decrease) in Interest Payable, Net	(2,629)	(1,220)
Increase (Decrease) in Deferred Fuel Costs	(4,203)	(51)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(8,825)	(8,120)
Provision for Other Losses	(10,772)	2,473
Increase (Decrease) in Other Regulatory Assets	10,338	11,073
Increase (Decrease) in Regulatory Liabilities	(13,791)	167,529
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(4,804)	(3,876)
Other Operating Activities, Cash Flow Statement	3,222	(2,694)
Net Cash Provided by (Used in) Operating Activities, Total	23,652	45,416
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	91,611	72,409
Allowance for Funds Used During Construction, Investing Activities	800	889
Change in money pool receivable - net	3,146	(1,110)
Changes in securitization account	1,611	1,120
Payments to storm reserve escrow accounts	1,664	2,939
Receipts from storm reserve escrow accounts	10,333	0
Net Cash Provided by (Used in) Investing Activities, Total	(77,385)	(74,449)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(79,717)	(149,075)
Repayments of Long-Term Debt	(78,000)	(91,245)
Change in money pool payable - net	20,884	(21,651)
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	(619)	(614)
Net Cash Provided by (Used in) Financing Activities, Total	21,982	35,565
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(31,751)	6,532
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	26	6,558	31,777	26
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	27,816	20,159
Income Taxes Paid, Net	0	2,598
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	5,059	4,263
Entergy Texas [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	148,352	126,966
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	161,510	180,329
Deferred Income Taxes and Tax Credits	21,466	21,112
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(36,849)	(64,108)
Increase (Decrease) in Fuel Inventories	9,817	1,877
Increase (Decrease) in Accounts Payable	37,267	13,853
Increase (Decrease) in Accrued Taxes Payable	(20,591)	(21,155)
Increase (Decrease) in Interest Payable, Net	5,971	(561)
Increase (Decrease) in Deferred Fuel Costs	(69,075)	80,220
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(6,447)	(9,386)
Provision for Other Losses	1,201	(1,384)
Increase (Decrease) in Other Regulatory Assets	60,125	40,197
Increase (Decrease) in Regulatory Liabilities	(13,317)	(26,028)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(7,131)	(8,190)
Other Operating Activities, Cash Flow Statement	(49,963)	(41,322)
Net Cash Provided by (Used in) Operating Activities, Total	242,336	292,420
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	932,013	522,890
Allowance for Funds Used During Construction, Investing Activities	37,335	20,082
Change in money pool receivable - net	13,669	296,670
Payments for (Proceeds from) Other Investing Activities	0	(12,660)
Changes in securitization account	1,698	2,856
Payments for (Proceeds from) Other Investing Activities	0	12,660
Net Cash Provided by (Used in) Investing Activities, Total	(879,311)	(215,942)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(493,772)	0
Repayments of Long-Term Debt	(9,359)	(9,104)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	1,036	1,036
Proceeds from (Payments for) Other Financing Activities	(13,656)	36,582
Net Cash Provided by (Used in) Financing Activities, Total	469,721	26,442
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(167,254)	102,920
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	17,743	124,906	184,997	21,986
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	78,477	65,529
Income Taxes Paid, Net	2,077	5,862
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	127,069	343,525
System Energy [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	44,714	55,966
Consolidated Net Income Adjustments To Reconcile Consolidated Net Income To Net Cash Flow [Abstract]
Depreciation, Amortization and Accretion, Net	111,023	106,652
Deferred Income Taxes and Tax Credits	11,063	28,258
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	722	(9,335)
Increase (Decrease) in Accounts Payable	(18,674)	74,527
Increase (Decrease) in Accrued Taxes Payable	(10,605)	(19,301)
Increase (Decrease) in Interest Payable, Net	(99)	(620)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	344	(27,233)
Increase (Decrease) in Other Regulatory Assets	1,716	21,178
Increase (Decrease) in Regulatory Liabilities	52,405	(115,256)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(6,875)	(6,952)
Other Operating Activities, Cash Flow Statement	(54,233)	(80,464)
Net Cash Provided by (Used in) Operating Activities, Total	131,501	27,420
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	51,746	87,410
Allowance for Funds Used During Construction, Investing Activities	3,484	3,885
Payments for Nuclear Fuel	(26,957)	(115,544)
Proceeds from Nuclear Fuel	43,555	21
Change in money pool receivable - net	(5,810)	(5,238)
Payments for (Proceeds from) Other Investing Activities	0	23
Proceeds from Decommissioning Trust Fund Assets	369,739	455,082
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(388,253)	(467,485)
Payments for (Proceeds from) Other Investing Activities	0	(23)
Net Cash Provided by (Used in) Investing Activities, Total	(55,988)	(216,666)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	(538,108)	(544,736)
Repayments of Long-Term Debt	(535,740)	(462,226)
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	(75,000)	0
Net Cash Provided by (Used in) Financing Activities, Total	(72,632)	220,264
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	2,881	31,018
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	31,789	31,078	$ 28,908	$ 60
Cash Paid Received During Period For [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	33,146	25,231
Income Taxes Paid, Net	0	(2,326)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 8,448	$ 24,234