Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,773,328	$ 1,061,184	$ 2,362,310
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	2,537,138	2,443,562	2,244,479
Deferred Income Taxes and Tax Credits	1,015,509	320,705	(707,822)
Asset Impairment Charges	12,795	107,134	42,679
Pension Expense (Reversal of Expense), Noncash	0	319,675	0
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(79,833)	3,056	101,801
Increase (Decrease) in Fuel Inventories	38,927	21,898	(45,166)
Increase (Decrease) in Accounts Payable	38,755	111,839	(135,048)
Increase (Decrease) in Accrued Taxes Payable	68,083	22,893	10,122
Increase (Decrease) in Interest Payable, Net	26,103	45,357	18,933
Increase (Decrease) in Deferred Fuel Costs	(271,109)	182,578	759,361
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(296,714)	19,177	210,038
Provision for Other Losses	(10,284)	43,493	(68,631)
Increase (Decrease) in Other Regulatory Assets	(284,914)	(378,514)	(435,877)
Increase (Decrease) in Regulatory Liabilities	180,811	660,559	463,805
Increase (Decrease) in Customer advances	35,000	0	0
Effect of securitization on regulatory asset	0	0	(491,150)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(278,186)	(469,721)	(610,479)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	518,014	745,039	(123,295)
Net Cash Provided by (Used in) Operating Activities, Total	5,150,651	4,488,510	4,294,328
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(7,684,922)	(4,838,339)	(4,440,652)
Allowance for Funds Used During Construction, Investing Activities	180,726	133,046	98,493
Payments for Nuclear Fuel	(252,912)	(309,437)	(270,973)
Payments to Acquire Other Productive Assets	3,517	821,934	35,094
Proceeds from Sale of Productive Assets	858,588	0	11,000
Proceeds from Insurance Settlement, Investing Activities	0	7,907	19,493
Changes in securitization account	2,834	3,308	5,493
Payments to storm reserve escrow accounts	14,894	17,990	19,780
Receipts from storm reserve escrow accounts	46,570	736	98,529
Decrease (increase) in other investments	113,388	(212)	16,733
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	3,546	82,412	23,655
Proceeds from Decommissioning Trust Fund Assets	1,509,997	2,805,145	1,082,722
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(1,642,082)	(2,894,076)	(1,185,130)
Net Cash Provided by (Used in) Investing Activities, Total	(7,109,454)	(5,849,010)	(4,628,977)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	5,750,445	7,898,968	4,273,297
Proceeds from Sale of Treasury Stock	36,641	136,794	9,823
Proceeds from Issuance of Common Stock	1,136,103	0	130,649
Repayments of Long-Term Debt	(3,501,800)	(5,054,094)	(5,135,753)
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	1,643,765	547,500	259,505
Proceeds received by storm trusts related to securitization	0	0	1,457,676
Proceeds from Noncontrolling Interests	0	0	25,708
Proceeds from (Repayments of) Short-Term Debt	269,517	210,880	(310,550)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(1,074,151)	(981,659)	(918,193)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(18,319)	(18,319)	(18,319)
Proceeds from (Payment for) Other Financing Activity	(12,255)	(25,664)	(43,007)
Net Cash Provided by (Used in) Financing Activities, Total	3,028,016	2,087,655	243,033
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	1,069,213	727,155	(91,616)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	1,928,916	859,703	132,548	$ 224,164
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	1,238,284	1,114,631	987,252
Proceeds from tax credit sales	547,261	0	0
Income Taxes Paid, Net	(515,071)	41,551	42,821
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	800,047	615,490	487,439
Payment for Advance for Construction, Financing Activity	(662,896)	(204,991)	(108,903)
Entergy Arkansas [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	437,453	319,466	396,850
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	650,881	588,599	556,780
Deferred Income Taxes and Tax Credits	341,658	81,911	(102,070)
Asset Impairment Charges	0	131,775	78,434
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(30,391)	114,936	(84,428)
Increase (Decrease) in Fuel Inventories	10,555	7,558	(6,351)
Increase (Decrease) in Accounts Payable	36,401	(10,425)	(69,947)
Increase (Decrease) in Accrued Taxes Payable	21,778	(11,936)	4,625
Increase (Decrease) in Interest Payable, Net	1,332	3,007	16,554
Increase (Decrease) in Deferred Fuel Costs	(72,862)	(43,124)	228,021
Increase (Decrease) in Other Operating Assets and Liabilities, Net	46,046	29,148	29,690
Provision for Other Losses	9,060	17,520	(21,039)
Increase (Decrease) in Other Regulatory Assets	43,738	(185,251)	6,197
Increase (Decrease) in Regulatory Liabilities	218,074	97,049	240,762
Increase (Decrease) in Customer advances	10,000	0	0
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(79,244)	(135,464)	(109,077)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	129,863	338,295	152,206
Net Cash Provided by (Used in) Operating Activities, Total	1,335,048	978,680	941,021
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(1,046,878)	(812,329)	(946,244)
Allowance for Funds Used During Construction, Investing Activities	24,349	29,569	20,587
Payments for Nuclear Fuel	(120,819)	(151,604)	(137,616)
Payments to Acquire Other Productive Assets	3,517	819,014	0
Proceeds from Nuclear Fuel	40,601	33,213	32,937
Payments for (Proceeds from) Investments	36,977	(30)	(1,608)
Change in money pool receivable - net	(21,715)	0	0
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	0	17,933
Proceeds from Decommissioning Trust Fund Assets	169,591	718,415	117,123
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(202,872)	(730,910)	(139,280)
Net Cash Provided by (Used in) Investing Activities, Total	(1,197,122)	(1,732,630)	(1,032,952)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	439,709	1,154,129	1,093,253
Repayments of Long-Term Debt	(149,422)	(717,121)	(597,720)
Proceeds from Contributions from Parent	0	695,000	0
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	190,000	310,000	417,000
Change in money pool payable - net	(15,190)	(130,195)	(35,410)
Dividends Paid [Abstract]
Proceeds from (Payment for) Other Financing Activity	47,800	63,252	47,162
Net Cash Provided by (Used in) Financing Activities, Total	132,897	755,065	90,285
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	270,823	1,115	(1,646)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	275,570	4,747	3,632	5,278
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	213,561	212,691	169,173
Proceeds from tax credit sales	215,224	0	0
Income Taxes Paid, Net	(244,911)	9,484	2,705
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	98,219	37,495	36,264
Payment for (Proceeds from) Other Investing Activity	1,115	0	0
Entergy Louisiana [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,112,900	890,771	1,273,370
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	973,816	937,246	864,225
Deferred Income Taxes and Tax Credits	551,267	259,474	(99,812)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(16,151)	4,248	55,140
Increase (Decrease) in Fuel Inventories	14,249	7,601	(15,959)
Increase (Decrease) in Accounts Payable	48,350	(6,123)	(100,321)
Increase (Decrease) in Accrued Taxes Payable	35,778	(37,448)	30,459
Increase (Decrease) in Interest Payable, Net	6,163	28,530	(9,680)
Increase (Decrease) in Deferred Fuel Costs	(20,366)	29,494	134,383
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(335,100)	(84,692)	129,173
Provision for Other Losses	(18,963)	15,754	(52,445)
Increase (Decrease) in Other Regulatory Assets	(106,205)	(1,937)	(407,327)
Increase (Decrease) in Regulatory Liabilities	(110,727)	452,731	225,645
Effect of securitization on regulatory asset	0	0	(491,150)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(72,455)	(117,627)	(117,886)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	203,445	303,717	(57,997)
Net Cash Provided by (Used in) Operating Activities, Total	2,741,721	2,247,563	2,032,120
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(3,065,462)	(1,633,669)	(1,624,181)
Allowance for Funds Used During Construction, Investing Activities	54,958	36,782	32,160
Payments for Nuclear Fuel	(160,003)	(125,315)	(162,079)
Proceeds from Nuclear Fuel	17,230	63,297	30,214
Proceeds from Sale of Productive Assets	200,673	2,109	0
Proceeds from Insurance Settlement, Investing Activities	0	7,907	19,493
Payments to storm reserve escrow accounts	11,700	12,899	14,449
Receipts from storm reserve escrow accounts	33,456	0	64,036
Payments for (Proceeds from) Investments	58,424	(35)	(5,457)
Change in money pool receivable - net	(30,767)	(32,668)	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0	(1,457,676)
Proceeds from Decommissioning Trust Fund Assets	727,260	1,185,491	575,596
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(792,413)	(1,242,466)	(633,029)
Redemption of preferred membership interests of affiliate	249,078	239,249	125,002
Net Cash Provided by (Used in) Investing Activities, Total	(2,877,549)	(1,512,147)	(3,039,456)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	2,098,625	2,743,965	1,410,893
Repayments of Long-Term Debt	(1,605,837)	(2,305,336)	(2,699,235)
Proceeds from Contributions from Parent	0	0	1,457,676
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	1,265,745	285,798	105,622
Proceeds received by storm trusts related to securitization	0	0	1,457,676
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	756,250	859,100	660,750
Change in money pool payable - net	0	(156,166)	(69,948)
Dividends Paid [Abstract]
Proceeds from (Payment for) Other Financing Activity	(11,539)	(11,189)	(8,725)
Net Cash Provided by (Used in) Financing Activities, Total	585,687	(411,086)	953,495
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	449,859	324,330	(53,841)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	776,961	327,102	2,772	56,613
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	413,547	366,384	376,353
Proceeds from tax credit sales	198,285	0	0
Income Taxes Paid, Net	(344,295)	16,882	(141,143)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	267,887	124,077	105,859
Payment for Advance for Construction, Financing Activity	(405,057)	(109,058)	(39,714)
Payments to Acquire Productive Assets	(41,435)	0	0
Entergy Mississippi [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	308,728	245,407	181,969
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	273,301	270,483	262,624
Deferred Income Taxes and Tax Credits	43,273	43,245	28,990
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(28,465)	7,221	3,627
Increase (Decrease) in Fuel Inventories	(3,518)	1,233	(648)
Increase (Decrease) in Accounts Payable	7,608	60,450	(41,101)
Increase (Decrease) in Accrued Taxes Payable	(15,804)	63,890	(9,771)
Increase (Decrease) in Interest Payable, Net	7,800	(870)	3,329
Increase (Decrease) in Deferred Fuel Costs	(137,073)	(4,329)	273,856
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(79,721)	32,138	23,813
Provision for Other Losses	4,364	7,719	1,972
Increase (Decrease) in Other Regulatory Assets	(70,133)	(53,229)	59,616
Increase (Decrease) in Regulatory Liabilities	74,631	17,985	(59,513)
Increase (Decrease) in Customer advances	25,000	0	0
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(20,644)	(33,506)	(49,223)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	(15,639)	564	(46,709)
Net Cash Provided by (Used in) Operating Activities, Total	704,694	699,455	559,391
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(1,457,803)	(699,690)	(562,118)
Allowance for Funds Used During Construction, Investing Activities	9,449	9,095	8,552
Payments to Acquire Other Productive Assets	0	0	35,094
Proceeds from Sale of Productive Assets	14,469	818	0
Receipts from storm reserve escrow accounts	0	736	34,493
Payments for (Proceeds from) Investments	(16)	960	690
Change in money pool receivable - net	(12,204)	(15,218)	26,879
Net Cash Provided by (Used in) Investing Activities, Total	(1,446,073)	(705,219)	(527,978)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	592,506	395,881	396,833
Repayments of Long-Term Debt	0	(200,000)	(500,000)
Proceeds from Contributions from Parent	265,500	0	0
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	167,731	111,990	23,609
Proceeds from Noncontrolling Interests	0	0	25,708
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	0	44,633	40,000
Change in money pool payable - net	0	(73,769)	73,769
Dividends Paid [Abstract]
Proceeds from (Payment for) Other Financing Activity	(2,782)	(2,611)	(2,168)
Net Cash Provided by (Used in) Financing Activities, Total	927,170	154,827	(41,762)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	185,791	149,063	(10,349)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	341,484	155,693	6,630	16,979
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	118,634	109,444	93,961
Income Taxes Paid, Net	82,541	(14,170)	50,869
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	272,321	141,227	16,342
Payment for Advance for Construction, Financing Activity	(95,785)	(32,031)	(19,513)
Entergy New Orleans [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	50,411	15,847	228,938
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	81,830	84,937	81,282
Deferred Income Taxes and Tax Credits	(1,040)	12,271	(191,326)
Asset Impairment Charges	12,795	0	0
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	18,909	(6,955)	29,944
Increase (Decrease) in Fuel Inventories	3,295	(813)	2,574
Increase (Decrease) in Accounts Payable	(19,309)	(4,864)	(11,924)
Increase (Decrease) in Accrued Taxes Payable	7,550	10,360	(11,882)
Increase (Decrease) in Interest Payable, Net	(1,842)	137	454
Increase (Decrease) in Deferred Fuel Costs	7,110	2,247	4,005
Increase (Decrease) in Other Operating Assets and Liabilities, Net	2,913	(192)	9,184
Provision for Other Losses	(11,360)	2,169	1,076
Increase (Decrease) in Other Regulatory Assets	(47,257)	(25,424)	(19,745)
Increase (Decrease) in Regulatory Liabilities	26,316	175,808	66,022
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	5,711	(21,638)	(16,371)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	41,021	8,393	(9,603)
Net Cash Provided by (Used in) Operating Activities, Total	183,699	286,729	202,956
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(176,058)	(158,257)	(164,279)
Allowance for Funds Used During Construction, Investing Activities	1,857	2,118	1,470
Proceeds from Sale of Productive Assets	283,918	0	0
Changes in securitization account	1,611	815	(191)
Payments to storm reserve escrow accounts	3,194	5,011	3,731
Receipts from storm reserve escrow accounts	13,114	0	0
Payments for (Proceeds from) Investments	0	0	(675)
Change in money pool receivable - net	(5,863)	(3,146)	147,254
Net Cash Provided by (Used in) Investing Activities, Total	115,385	(163,481)	(18,802)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	79,678	148,913	14,610
Repayments of Long-Term Debt	(158,004)	(91,245)	(112,525)
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	0	0	15,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	140,000	125,000	125,000
Change in money pool payable - net	0	(21,651)	21,651
Repayment of long-term payable due to Entergy Louisiana	(1,140)	(1,275)	(1,306)
Dividends Paid [Abstract]
Proceeds from (Payment for) Other Financing Activity	(1,131)	(1,239)	(1,022)
Net Cash Provided by (Used in) Financing Activities, Total	(220,597)	(91,497)	(188,592)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	78,487	31,751	(4,438)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	110,264	31,777	26	4,464
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	35,205	40,312	36,263
Income Taxes Paid, Net	10,097	(17,903)	14,120
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	12,721	2,865	7,068
Entergy Texas [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	334,071	293,622	291,273
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	325,185	338,890	278,311
Deferred Income Taxes and Tax Credits	37,714	35,631	53,507
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(43,441)	(13,201)	24,249
Increase (Decrease) in Fuel Inventories	15,137	4,877	(24,097)
Increase (Decrease) in Accounts Payable	10,245	41,216	(22,046)
Increase (Decrease) in Accrued Taxes Payable	10,706	(2,413)	(14,146)
Increase (Decrease) in Interest Payable, Net	3,204	7,418	7,357
Increase (Decrease) in Deferred Fuel Costs	(47,918)	198,290	119,096
Increase (Decrease) in Other Operating Assets and Liabilities, Net	50,423	38,672	36,097
Provision for Other Losses	3,573	505	1,887
Increase (Decrease) in Other Regulatory Assets	(38,902)	(46,898)	17,924
Increase (Decrease) in Regulatory Liabilities	84,253	(45,301)	(20,122)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(29,430)	(29,062)	(36,131)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	63,865	15,049	(36,574)
Net Cash Provided by (Used in) Operating Activities, Total	627,913	823,649	641,691
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(1,720,604)	(1,287,518)	(946,543)
Allowance for Funds Used During Construction, Investing Activities	81,771	47,833	28,193
Proceeds from Sale of Productive Assets	400,266	2,396	11,000
Changes in securitization account	1,223	2,493	5,684
Payments for (Proceeds from) Investments	0	(7,000)	5,868
Change in money pool receivable - net	(3,963)	299,378	(218,414)
Net Cash Provided by (Used in) Investing Activities, Total	(1,241,307)	(928,418)	(1,125,948)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	493,515	343,124	344,895
Repayments of Long-Term Debt	(18,847)	(18,334)	(17,835)
Proceeds from Contributions from Parent	225,000	0	150,000
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	0	(69,000)	0
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(2,072)	(2,072)	(2,072)
Proceeds from (Payment for) Other Financing Activity	5,909	14,062	27,758
Net Cash Provided by (Used in) Financing Activities, Total	703,505	267,780	502,746
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	90,111	163,011	18,489
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	275,108	184,997	21,986	3,497
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	160,072	127,342	104,766
Income Taxes Paid, Net	23,517	34,077	28,969
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	102,988	279,480	257,467
System Energy [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	88,095	103,500	108,772
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	225,844	217,250	195,045
Deferred Income Taxes and Tax Credits	153,647	41,142	32,982
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(21,208)	10,697	8,359
Increase (Decrease) in Accounts Payable	(9,231)	(89,911)	78,655
Increase (Decrease) in Accrued Taxes Payable	(4,167)	(11,549)	19,804
Increase (Decrease) in Interest Payable, Net	(127)	388	1,363
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(1,580)	15,353	(20,749)
Increase (Decrease) in Other Regulatory Assets	174,691	(19,866)	31,239
Increase (Decrease) in Regulatory Liabilities	144,604	(37,713)	11,009
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(20,947)	(30,717)	(21,259)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item	131,659	176,095	150,668
Net Cash Provided by (Used in) Operating Activities, Total	251,740	31,505	273,572
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Payments to Acquire Property, Plant, and Equipment	(138,849)	(174,257)	(121,075)
Allowance for Funds Used During Construction, Investing Activities	8,342	7,647	7,531
Payments for Nuclear Fuel	(73,471)	(145,567)	(80,663)
Proceeds from Nuclear Fuel	43,549	16,531	46,242
Payments for (Proceeds from) Investments	0	(23)	3
Change in money pool receivable - net	2,851	(2,851)	94,981
Proceeds from Decommissioning Trust Fund Assets	613,146	901,239	390,004
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(646,797)	(920,700)	(412,823)
Net Cash Provided by (Used in) Investing Activities, Total	(191,229)	(317,935)	(75,806)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	764,028	1,325,581	715,545
Repayments of Long-Term Debt	(769,690)	(978,057)	(758,437)
Proceeds from Contributions from Parent	0	150,000	0
Change in money pool payable - net	16,299	(12,246)	12,246
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(100,000)	(170,000)	(170,000)
Net Cash Provided by (Used in) Financing Activities, Total	(89,363)	315,278	(200,646)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(28,852)	28,848	(2,880)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	56	28,908	60	$ 2,940
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activity	64,252	57,599	45,196
Proceeds from tax credit sales	133,752	0	0
Income Taxes Paid, Net	(131,297)	624	(19,810)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 16,830	$ 6,290	$ 25,301