Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Asset Impairment Charges		$ 107,134	$ 42,679	$ (163,464)
Depreciation, Depletion and Amortization		2,233,248	2,051,677	1,985,099
Investment Income, Net		298,865	162,726	(75,581)
Interest Expense, Nonoperating		1,150,820	1,006,406	912,237
Income Tax Expense (Benefit)	$ 9,000	381,027	(690,535)	(38,978)
Assets		64,790,032	59,703,396	58,595,191
Segment, Expenditure, Addition to Long-Lived Assets		5,969,710	4,746,719	5,396,127
Revenues		11,879,653	12,147,412	13,764,237
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		2,898,237	2,898,213	3,038,459
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,061,184	2,362,310	1,097,138
Entergy Arkansas [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges		131,775	78,434	0
Investment Income, Net		70,628	25,024	19,554
Interest Expense, Nonoperating		203,852	179,962	143,858
Income Tax Expense (Benefit)		74,574	(99,210)	80,896
Assets		15,073,983	13,672,858
Revenues		2,460,181	2,646,396	2,673,194
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		742,573	737,649	754,293
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		319,466	396,850	292,887
Entergy Louisiana [Member]
Segment Reporting Information [Line Items]
Interest Expense, Nonoperating		391,183	360,299	361,930
Income Tax Expense (Benefit)		225,409	(205,781)	(162,853)
Assets		30,348,550	29,109,470
Revenues		5,144,018	5,147,770	6,338,768
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		1,097,283	1,097,233	1,139,605
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		890,771	1,273,370	855,870
Entergy Mississippi [Member]
Segment Reporting Information [Line Items]
Investment Income, Net		3,249	2,275	508
Interest Expense, Nonoperating		107,411	96,378	84,160
Income Tax Expense (Benefit)		80,315	54,364	54,864
Assets		6,988,970	6,228,006
Revenues		1,764,593	1,802,533	1,624,234
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		315,651	320,192	314,902
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		245,407	181,969	176,267
Entergy New Orleans [Member]
Segment Reporting Information [Line Items]
Investment Income, Net		2,144	7,154	742
Interest Expense, Nonoperating		41,454	37,404	34,298
Income Tax Expense (Benefit)		2,842	(189,973)	24,277
Assets		2,223,153	2,097,975
Revenues		810,564	843,933	997,333
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		172,101	167,719	156,653
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		15,847	228,938	64,101
Entergy Texas [Member]
Segment Reporting Information [Line Items]
Investment Income, Net		15,107	11,116	4,141
Interest Expense, Nonoperating		119,194	104,433	90,907
Income Tax Expense (Benefit)		65,684	62,872	50,621
Assets		8,970,080	8,056,572
Revenues		2,050,150	2,028,586	2,288,905
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		340,956	323,797	312,340
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		293,622	291,273	303,327
System Energy [Member]
Segment Reporting Information [Line Items]
Investment Income, Net		47,953	13,131	5,096
Interest Expense, Nonoperating		45,102	46,662	36,056
Income Tax Expense (Benefit)		29,503	32,032	(92,828)
Assets		4,642,474	4,312,363
Revenues		585,049	586,603	658,812
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		192,300	207,765	226,557
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		103,500	108,772	(276,593)
Consolidation, Eliminations
Segment Reporting Information [Line Items]
Asset Impairment Charges		0	0
Depreciation, Depletion and Amortization		0	0	0
Investment Income, Net		(315,013)	(299,685)	(186,256)
Interest Expense, Nonoperating		(2,152)	(705)	(238)
Income Tax Expense (Benefit)		0	0	0
Assets		(4,882,991)	(5,020,240)	(3,688,494)
Segment, Expenditure, Addition to Long-Lived Assets		0	0	0
Revenues		(63)	(41)	(28)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		(312,860)	(298,979)	(186,017)
Utility [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges		131,775	79,962
Depreciation, Depletion and Amortization		2,226,681	2,045,254	1,941,653
Investment Income, Net		592,257	443,751	145,968
Interest Expense, Nonoperating		899,655	816,643	750,175
Income Tax Expense (Benefit)		515,665	(374,847)	(34,263)
Assets		68,951,564	63,887,038	61,399,243
Segment, Expenditure, Addition to Long-Lived Assets		5,967,739	4,745,918	5,382,243
Revenues		11,805,802	12,022,944	13,420,804
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses		2,851,165	2,838,057	2,899,759
Segment Reporting, Other Segment Item, Amount		4,109,352	3,152,475	3,340,547
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		1,830,301	2,510,904	1,398,580
Corporate Segment and Other Operating Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges		(24,641)	(37,283)
Depreciation, Depletion and Amortization		6,567	6,423	43,446
Investment Income, Net		21,621	18,660	(35,293)
Interest Expense, Nonoperating		253,317	190,468	162,300
Income Tax Expense (Benefit)		(134,638)	(315,688)	(4,715)
Assets		721,459	836,598	884,442
Segment, Expenditure, Addition to Long-Lived Assets		1,971	801	13,884
Revenues		$ 73,914	$ 124,509	$ 343,461