Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,061,184	$ 2,362,310	$ 1,097,138
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	2,443,562	2,244,479	2,190,371
Deferred Income Taxes and Tax Credits	320,705	(707,822)	(47,154)
Asset Impairment Charges	107,134	42,679	(163,464)
Pension Expense (Reversal of Expense), Noncash	319,675	0	0
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	3,056	101,801	(157,267)
Increase (Decrease) in Fuel Inventories	21,898	(45,166)	6,943
Increase (Decrease) in Accounts Payable	111,839	(135,048)	(102,013)
Increase (Decrease) in Accrued Taxes Payable	22,893	10,122	4,263
Increase (Decrease) in Interest Payable, Net	45,357	18,933	4,113
Increase (Decrease) in Deferred Fuel Costs	182,578	759,361	(393,746)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	19,177	210,038	157,235
Provision for Other Losses	43,493	(68,631)	374,079
Increase (Decrease) in Other Regulatory Assets	(378,514)	(435,877)	(576,859)
Increase (Decrease) in Regulatory Liabilities	660,559	463,805	(266,559)
Effect of securitization on regulatory asset	0	(491,150)	(941,035)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(469,721)	(610,479)	(699,261)
Other Operating Activities, Cash Flow Statement	745,039	(123,295)	(1,259,458)
Net Cash Provided by (Used in) Operating Activities, Total	4,488,510	4,294,328	2,585,490
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(4,838,339)	(4,440,652)	(5,065,126)
Allowance for Funds Used During Construction, Investing Activities	133,046	98,493	72,832
Litigation Proceeds from Settlement Agreement, Investing Activities	0	0	9,829
Payments for Nuclear Fuel	(309,437)	(270,973)	(223,613)
Payments to Acquire Other Productive Assets	821,934	35,094	106,193
Proceeds from Sale of Productive Assets	0	11,000	(1,195)
Proceeds from Insurance Settlement, Investing Activities	7,907	19,493	0
Changes in securitization account	3,308	5,493	15,514
Payments to storm reserve escrow accounts	17,990	19,780	1,494,048
Receipts from storm reserve escrow accounts	736	98,529	1,125,279
Payments for (Proceeds from) Other Investing Activities	212	(16,733)	(3,328)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	82,412	23,655	32,367
Proceeds from Decommissioning Trust Fund Assets	2,805,145	1,082,722	1,636,686
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(2,894,076)	(1,185,130)	(1,708,901)
Net Cash Provided by (Used in) Investing Activities, Total	(5,849,010)	(4,628,977)	(5,709,897)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	7,898,968	4,273,297	6,019,835
Proceeds from Sale of Treasury Stock	136,794	9,823	32,042
Proceeds from Issuance of Common Stock	0	130,649	852,555
Repayments of Long-Term Debt	(5,054,094)	(5,135,753)	(5,995,903)
Proceeds received by storm trusts related to securitization	0	1,457,676	3,163,572
Proceeds from Noncontrolling Interests	0	25,708	24,702
Proceeds from (Repayments of) Short-Term Debt	210,880	(310,550)	373,556
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(981,659)	(918,193)	(841,677)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(18,319)	(18,319)	(18,319)
Proceeds from (Payments for) Other Financing Activities	316,845	107,595	42,761
Net Cash Provided by (Used in) Financing Activities, Total	2,087,655	243,033	2,906,012
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	727,155	(91,616)	(218,395)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	859,703	132,548	224,164	$ 442,559
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	1,114,631	987,252	901,884
Income Taxes Paid, Net	41,551	42,821	28,354
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	615,490	487,439	461,748
Entergy Arkansas [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	319,466	396,850	292,887
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	588,599	556,780	532,291
Deferred Income Taxes and Tax Credits	81,911	(102,070)	78,958
Asset Impairment Charges	131,775	78,434	0
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	114,936	(84,428)	(73,579)
Increase (Decrease) in Fuel Inventories	7,558	(6,351)	(252)
Increase (Decrease) in Accounts Payable	(10,425)	(69,947)	64,944
Increase (Decrease) in Accrued Taxes Payable	(11,936)	4,625	10,936
Increase (Decrease) in Interest Payable, Net	3,007	16,554	1,708
Increase (Decrease) in Deferred Fuel Costs	(43,124)	228,021	(31,009)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	29,148	29,690	29,789
Provision for Other Losses	17,520	(21,039)	2,914
Increase (Decrease) in Other Regulatory Assets	(185,251)	6,197	120,603
Increase (Decrease) in Regulatory Liabilities	97,049	240,762	(264,054)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(135,464)	(109,077)	(67,783)
Other Operating Activities, Cash Flow Statement	338,295	152,206	(302,163)
Net Cash Provided by (Used in) Operating Activities, Total	978,680	941,021	699,732
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(812,329)	(946,244)	(785,168)
Allowance for Funds Used During Construction, Investing Activities	29,569	20,587	17,787
Payments for Nuclear Fuel	(151,604)	(137,616)	(98,635)
Payments to Acquire Other Productive Assets	819,014	0	1,044
Proceeds from Nuclear Fuel	33,213	32,937	37,198
Payments for (Proceeds from) Other Investing Activities	30	1,608	(1,626)
Litigation proceeds for reimbursement of spent nuclear fuel storage costs	0	17,933	0
Proceeds from Decommissioning Trust Fund Assets	718,415	117,123	248,191
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(730,910)	(139,280)	(269,497)
Net Cash Provided by (Used in) Investing Activities, Total	(1,732,630)	(1,032,952)	(852,794)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	1,154,129	1,093,253	232,731
Repayments of Long-Term Debt	(717,121)	(597,720)	(28,521)
Proceeds from Contributions from Parent	695,000	0	0
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	310,000	417,000	86,000
Change in money pool payable - net	(130,195)	(35,410)	40,891
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	63,252	47,162	(13,676)
Net Cash Provided by (Used in) Financing Activities, Total	755,065	90,285	145,425
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	1,115	(1,646)	(7,637)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	4,747	3,632	5,278	12,915
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	212,691	169,173	147,060
Income Taxes Paid, Net	9,484	2,705	(2,753)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	37,495	36,264	93,189
Entergy Louisiana [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	890,771	1,273,370	855,870
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	937,246	864,225	852,521
Deferred Income Taxes and Tax Credits	259,474	(99,812)	(70,379)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	4,248	55,140	(53,434)
Increase (Decrease) in Fuel Inventories	7,601	(15,959)	1,099
Increase (Decrease) in Accounts Payable	(6,123)	(100,321)	(207,949)
Increase (Decrease) in Accrued Taxes Payable	(37,448)	30,459	(28,244)
Increase (Decrease) in Interest Payable, Net	28,530	(9,680)	8,284
Increase (Decrease) in Deferred Fuel Costs	29,494	134,383	(113,809)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(84,692)	129,173	103,571
Provision for Other Losses	15,754	(52,445)	291,824
Increase (Decrease) in Other Regulatory Assets	(1,937)	(407,327)	(720,487)
Increase (Decrease) in Regulatory Liabilities	452,731	225,645	(4,783)
Effect of securitization on regulatory asset	0	(491,150)	(1,190,338)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(117,627)	(117,886)	(139,067)
Other Operating Activities, Cash Flow Statement	303,717	(57,997)	(358,997)
Net Cash Provided by (Used in) Operating Activities, Total	2,247,563	2,032,120	1,177,508
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(1,633,669)	(1,624,181)	(2,568,113)
Allowance for Funds Used During Construction, Investing Activities	36,782	32,160	26,252
Litigation Proceeds from Settlement Agreement, Investing Activities	0	0	5,695
Payments for Nuclear Fuel	(125,315)	(162,079)	(122,020)
Proceeds from Nuclear Fuel	63,297	30,214	37,648
Proceeds from Sale of Productive Assets	2,109	0	5,000
Proceeds from Insurance Settlement, Investing Activities	7,907	19,493	0
Payments to storm reserve escrow accounts	12,899	14,449	1,293,633
Receipts from storm reserve escrow accounts	0	64,036	1,000,228
Change in money pool receivable - net	(32,668)	0	14,539
Payments to Acquire Interest in Subsidiaries and Affiliates	0	(1,457,676)	(3,163,572)
Payments for (Proceeds from) Other Investing Activities	35	5,457	(5,475)
Proceeds from Decommissioning Trust Fund Assets	1,185,491	575,596	633,100
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(1,242,466)	(633,029)	(667,947)
Redemption of preferred membership interests of affiliate	239,249	125,002	1,390,587
Net Cash Provided by (Used in) Investing Activities, Total	(1,512,147)	(3,039,456)	(4,707,711)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	2,743,965	1,410,893	2,942,771
Repayments of Long-Term Debt	(2,305,336)	(2,699,235)	(3,167,832)
Proceeds from Contributions from Parent	0	1,457,676	1,000,000
Proceeds received by storm trusts related to securitization	0	1,457,676	3,163,572
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	859,100	660,750	624,000
Change in money pool payable - net	(156,166)	(69,948)	226,114
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	165,551	57,183	27,618
Net Cash Provided by (Used in) Financing Activities, Total	(411,086)	953,495	3,568,243
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	324,330	(53,841)	38,040
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	327,102	2,772	56,613	18,573
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	366,384	376,353	353,697
Income Taxes Paid, Net	16,882	(141,143)	(82,463)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	124,077	105,859	156,654
Entergy Mississippi [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	245,407	181,969	176,267
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	270,483	262,624	246,063
Deferred Income Taxes and Tax Credits	43,245	28,990	54,850
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	7,221	3,627	(65,843)
Increase (Decrease) in Fuel Inventories	1,233	(648)	(5,237)
Increase (Decrease) in Accounts Payable	60,450	(41,101)	49,101
Increase (Decrease) in Accrued Taxes Payable	63,890	(9,771)	18,632
Increase (Decrease) in Interest Payable, Net	(870)	3,329	925
Increase (Decrease) in Deferred Fuel Costs	(4,329)	273,856	(21,333)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	32,138	23,813	(2,632)
Provision for Other Losses	7,719	1,972	(519)
Increase (Decrease) in Other Regulatory Assets	(53,229)	59,616	57,028
Increase (Decrease) in Regulatory Liabilities	17,985	(59,513)	20,165
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(33,506)	(49,223)	(35,299)
Other Operating Activities, Cash Flow Statement	564	(46,709)	(22,273)
Net Cash Provided by (Used in) Operating Activities, Total	699,455	559,391	405,649
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(699,690)	(562,118)	(534,020)
Allowance for Funds Used During Construction, Investing Activities	9,095	8,552	6,125
Payments to Acquire Other Productive Assets	0	35,094	105,149
Proceeds from Sale of Productive Assets	818	0	0
Receipts from storm reserve escrow accounts	736	34,493	0
Change in money pool receivable - net	(15,218)	26,879	13,577
Payments for (Proceeds from) Other Investing Activities	(960)	(690)	(1,273)
Net Cash Provided by (Used in) Investing Activities, Total	(705,219)	(527,978)	(620,740)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	395,881	396,833	249,266
Repayments of Long-Term Debt	(200,000)	(500,000)	(100,000)
Proceeds from Noncontrolling Interests	0	25,708	24,702
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	44,633	40,000	0
Change in money pool payable - net	(73,769)	73,769	0
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	77,348	1,928	10,475
Net Cash Provided by (Used in) Financing Activities, Total	154,827	(41,762)	184,443
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	149,063	(10,349)	(30,648)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	155,693	6,630	16,979	47,627
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	109,444	93,961	83,291
Income Taxes Paid, Net	(14,170)	50,869	(5,396)
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	141,227	16,342	59,474
Entergy New Orleans [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	15,847	228,938	64,101
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	84,937	81,282	76,938
Deferred Income Taxes and Tax Credits	12,271	(191,326)	18,685
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(6,955)	29,944	6,128
Increase (Decrease) in Fuel Inventories	(813)	2,574	(2,927)
Increase (Decrease) in Accounts Payable	(4,864)	(11,924)	21
Increase (Decrease) in Accrued Taxes Payable	10,360	(11,882)	5,923
Increase (Decrease) in Interest Payable, Net	137	454	89
Increase (Decrease) in Deferred Fuel Costs	2,247	4,005	(17,760)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(192)	9,184	790
Provision for Other Losses	2,169	1,076	80,719
Increase (Decrease) in Other Regulatory Assets	(25,424)	(19,745)	(46,505)
Increase (Decrease) in Regulatory Liabilities	175,808	66,022	(8,639)
Effect of securitization on regulatory asset	0	0	95,920
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(21,638)	(16,371)	9,769
Other Operating Activities, Cash Flow Statement	8,393	(9,603)	10,919
Net Cash Provided by (Used in) Operating Activities, Total	286,729	202,956	363,763
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(158,257)	(164,279)	(217,864)
Allowance for Funds Used During Construction, Investing Activities	2,118	1,470	829
Changes in securitization account	815	(191)	(236)
Payments to storm reserve escrow accounts	5,011	3,731	200,000
Receipts from storm reserve escrow accounts	0	0	125,000
Change in money pool receivable - net	(3,146)	147,254	(110,844)
Payments for (Proceeds from) Other Investing Activities	0	675	(675)
Net Cash Provided by (Used in) Investing Activities, Total	(163,481)	(18,802)	(403,790)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	148,913	14,610	0
Repayments of Long-Term Debt	(91,245)	(112,525)	(12,207)
Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity	0	15,000	15,000
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	125,000	125,000	0
Change in money pool payable - net	(21,651)	21,651	0
Repayment of long-term payable due to Entergy Louisiana	(1,275)	(1,306)	(1,326)
Dividends Paid [Abstract]
Proceeds from (Payments for) Other Financing Activities	(1,239)	(1,022)	162
Net Cash Provided by (Used in) Financing Activities, Total	(91,497)	(188,592)	1,629
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	31,751	(4,438)	(38,398)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	31,777	26	4,464	42,862
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	40,312	36,263	33,343
Income Taxes Paid, Net	(17,903)	14,120	499
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	2,865	7,068	11,152
Entergy Texas [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	293,622	291,273	303,327
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	338,890	278,311	230,692
Deferred Income Taxes and Tax Credits	35,631	53,507	41,648
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	(13,201)	24,249	(35,131)
Increase (Decrease) in Fuel Inventories	4,877	(24,097)	15,962
Increase (Decrease) in Accounts Payable	41,216	(22,046)	48,199
Increase (Decrease) in Accrued Taxes Payable	(2,413)	(14,146)	44,015
Increase (Decrease) in Interest Payable, Net	7,418	7,357	4,926
Increase (Decrease) in Deferred Fuel Costs	198,290	119,096	(209,835)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	38,672	36,097	19,574
Provision for Other Losses	505	1,887	(649)
Increase (Decrease) in Other Regulatory Assets	(46,898)	17,924	157,349
Increase (Decrease) in Regulatory Liabilities	(45,301)	(20,122)	(30,499)
Effect of securitization on regulatory asset	0	0	153,383
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(29,062)	(36,131)	20,656
Other Operating Activities, Cash Flow Statement	15,049	(36,574)	344
Net Cash Provided by (Used in) Operating Activities, Total	823,649	641,691	409,427
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(1,287,518)	(946,543)	(696,879)
Allowance for Funds Used During Construction, Investing Activities	47,833	28,193	13,527
Litigation Proceeds from Settlement Agreement, Investing Activities	0	0	4,134
Proceeds from Sale of Productive Assets	2,396	11,000	0
Changes in securitization account	2,493	5,684	15,750
Change in money pool receivable - net	299,378	(218,414)	(99,468)
Payments for (Proceeds from) Other Investing Activities	7,000	(5,868)	(1,133)
Net Cash Provided by (Used in) Investing Activities, Total	(928,418)	(1,125,948)	(764,069)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	343,124	344,895	606,168
Repayments of Long-Term Debt	(18,334)	(17,835)	(66,514)
Proceeds from Contributions from Parent	0	150,000	0
Change in money pool payable - net	0	0	(79,594)
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(69,000)	0	(105,000)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(2,072)	(2,072)	(2,060)
Proceeds from (Payments for) Other Financing Activities	14,062	27,758	5,111
Net Cash Provided by (Used in) Financing Activities, Total	267,780	502,746	358,111
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	163,011	18,489	3,469
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	184,997	21,986	3,497	28
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	127,342	104,766	87,682
Income Taxes Paid, Net	34,077	28,969	1,864
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	279,480	257,467	68,893
System Energy [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	103,500	108,772	(276,593)
Adjustments to reconcile consolidated net income to net cash flow provided by operating activities [Abstract]
Depreciation, Amortization and Accretion, Net	217,250	195,045	194,411
Deferred Income Taxes and Tax Credits	41,142	32,982	(85,720)
Changes In Working Capital [Abstract]
Increase (Decrease) in Receivables	10,697	8,359	(19,530)
Increase (Decrease) in Accounts Payable	(89,911)	78,655	(11,948)
Increase (Decrease) in Accrued Taxes Payable	(11,549)	19,804	(25,321)
Increase (Decrease) in Interest Payable, Net	388	1,363	(123)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	15,353	(20,749)	38,764
Increase (Decrease) in Other Regulatory Assets	(19,866)	31,239	19,575
Increase (Decrease) in Regulatory Liabilities	(37,713)	11,009	21,252
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits	(30,717)	(21,259)	(35,354)
Other Operating Activities, Cash Flow Statement	176,095	150,668	(304,545)
Net Cash Provided by (Used in) Operating Activities, Total	31,505	273,572	7,280
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment	(174,257)	(121,075)	(164,797)
Allowance for Funds Used During Construction, Investing Activities	7,647	7,531	8,312
Payments for Nuclear Fuel	(145,567)	(80,663)	(96,659)
Proceeds from Nuclear Fuel	16,531	46,242	18,855
Change in money pool receivable - net	(2,851)	94,981	(19,236)
Payments for (Proceeds from) Other Investing Activities	23	(3)	300
Proceeds from Decommissioning Trust Fund Assets	901,239	390,004	346,504
Payments to Acquire Investments to be Held in Decommissioning Trust Fund	(920,700)	(412,823)	(357,463)
Net Cash Provided by (Used in) Investing Activities, Total	(317,935)	(75,806)	(264,184)
Proceeds From Issuance Of [Abstract]
Proceeds from Issuance of Long-Term Debt	1,325,581	715,545	1,022,472
Repayments of Long-Term Debt	(978,057)	(758,437)	(986,829)
Proceeds from Contributions from Parent	150,000	0	135,000
Change in money pool payable - net	(12,246)	12,246	0
Dividends Paid [Abstract]
Payments of Ordinary Dividends, Common Stock	(170,000)	(170,000)	0
Net Cash Provided by (Used in) Financing Activities, Total	315,278	(200,646)	170,643
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	28,848	(2,880)	(86,261)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	28,908	60	2,940	$ 89,201
Cash Paid (Received) During the Period for [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	57,599	45,196	39,848
Income Taxes Paid, Net	624	(19,810)	18,413
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 6,290	$ 25,301	$ 28,960