Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	$ 3,194,922	$ 2,354,867	$ 2,439,910	$ 6,393,599
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	272,758	12,731	332,884
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	590,465	21,149	194,894
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(23,168)	(85,715)	(1,300,381)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	(33,208)	(3,181,086)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(2,332,640)	(2,079,778)	(2,160,484)
Cash Paid To Taxing Authorities	(54,000)	(27,000)	0
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	808,282	248,089	279,426
Entergy Arkansas [Member]
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	378,251	45,413	69,197	1,452,819
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	112,354	2,732	2,249
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	221,636	25,784	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(1,152)	(52,300)	(148,558)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			(1,237,313)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(142,860)	(30,333)	(34,683)
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	235,391	15,080	34,514
Entergy Louisiana [Member]
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	1,147,037	867,116	864,043	1,350,836
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	75,825	1,921	332,320
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	210,263	10,357	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(6,167)	(9,205)	(458,072)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			(361,041)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(721,552)	(753,101)	(735,612)
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	425,485	114,015	128,431
Entergy Mississippi [Member]
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	7,911	5,989	5,653	547,548
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	1,768	237	209
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	709	536	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(555)	(437)	(16,853)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			(525,251)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(6,000)	(4,997)	(3,778)
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	1,911	992	1,875
Entergy New Orleans [Member]
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	19,554	19,508	19,331	638,726
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	871	163	78
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	22	153	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(847)	(139)	(191,336)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			(428,137)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(4,744)	(11,639)	(11,721)
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	14,810	7,869	7,610
Entergy Texas [Member]
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	389,428	384,333	415,205	389,366
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	1,934	378	196
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	4,048	560	94,793
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(887)	(31,810)	(67,156)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			(1,994)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(285,936)	(314,446)	(381,561)
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	103,492	69,887	33,644
System Energy [Member]
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits	233,481	16,415	14,301	$ 23,702
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	74,391	833	752
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	142,840	1,281	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(165)	0	(9,532)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities			(621)
Offset to gross unrecognized tax benefits, credit and loss carryforward	(92,561)	(16,415)	(14,301)
Unrecognized Tax Benefits Net Of Unused Tax Attributes And Payments	$ 140,920	$ 0	$ 0