Segment Reporting (Reconciliation of Operating Profit (Loss) from Segments to Consolidated) (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Sep. 30, 2024	Jun. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			$ 11,879,653	$ 12,147,412	$ 13,764,237
Utilities Operating Expense, Fuel Used			2,256,874	2,801,580	3,732,851
Utilities Operating Expense, Purchased Power			839,236	968,036	1,561,544
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			2,898,237	2,898,213	3,038,459
Other Regulatory Charges (Credits) - Net			(6,133)	(138,469)	669,403
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			1,061,184	2,362,310	1,097,138
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(489,970)	(201,013)	(77,629)
Income Tax Expense (Benefit)	$ 9,000		381,027	(690,535)	(38,978)
Asset Impairment Charges			107,134	42,679	(163,464)
Preferred dividend requirements of subsidiaries and net income (loss) attributable to noncontrolling interests			5,594	5,774	(6,028)
Net Income (Loss) Available to Common Stockholders, Basic			1,055,590	2,356,536	1,103,166
Entergy Arkansas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			2,460,181	2,646,396	2,673,194
Utilities Operating Expense, Fuel Used			274,282	514,885	640,344
Utilities Operating Expense, Purchased Power			239,281	257,890	201,726
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			742,573	737,649	754,293
Other Regulatory Charges (Credits) - Net			(152,834)	(87,409)	(89,418)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			319,466	396,850	292,887
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(17,995)	(23,216)	(27,348)
Income Tax Expense (Benefit)			74,574	(99,210)	80,896
Asset Impairment Charges			131,775	78,434	0
Entergy Louisiana [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			5,144,018	5,147,770	6,338,768
Utilities Operating Expense, Fuel Used			1,026,343	1,080,485	2,002,456
Utilities Operating Expense, Purchased Power			670,874	654,721	1,076,715
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			1,097,283	1,097,233	1,139,605
Other Regulatory Charges (Credits) - Net			41,525	41,209	148,871
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			890,771	1,273,370	855,870
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(123,280)	(160,972)	9,824
Income Tax Expense (Benefit)			225,409	(205,781)	(162,853)
Entergy Mississippi [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			1,764,593	1,802,533	1,624,234
Utilities Operating Expense, Fuel Used			270,015	563,296	252,760
Utilities Operating Expense, Purchased Power			273,580	281,761	322,674
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			315,651	320,192	314,902
Other Regulatory Charges (Credits) - Net			36,723	(111,376)	38,017
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			245,407	181,969	176,267
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(11,157)	(13,231)	(3,619)
Income Tax Expense (Benefit)			80,315	54,364	54,864
Entergy New Orleans [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			810,564	843,933	997,333
Utilities Operating Expense, Fuel Used			99,055	122,400	244,994
Utilities Operating Expense, Purchased Power			252,863	268,478	314,283
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			172,101	167,719	156,653
Other Regulatory Charges (Credits) - Net			85,136	69,211	19,596
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			15,847	228,938	64,101
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(115)	(4,119)	(21)
Income Tax Expense (Benefit)			2,842	(189,973)	24,277
Entergy Texas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			2,050,150	2,028,586	2,288,905
Utilities Operating Expense, Fuel Used			482,486	403,111	443,765
Utilities Operating Expense, Purchased Power			373,036	468,511	717,501
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			340,956	323,797	312,340
Other Regulatory Charges (Credits) - Net			(13,884)	7,324	49,175
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			293,622	291,273	303,327
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(11,113)	(10,411)	(6,572)
Income Tax Expense (Benefit)			65,684	62,872	50,621
Net Income (Loss) Available to Common Stockholders, Basic			291,550	289,201	301,255
System Energy [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			585,049	586,603	658,812
Utilities Operating Expense, Fuel Used			62,433	71,762	50,216
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			192,300	207,765	226,557
Other Regulatory Charges (Credits) - Net			(2,799)	(57,429)	503,162
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			103,500	108,772	(276,593)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			672	(9,101)	(19,616)
Income Tax Expense (Benefit)			29,503	32,032	(92,828)
Palisades [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gain (Loss) on Disposition of Assets		$ 166,000
Group annuity contract purchase | Pension Plan [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			328,000
Consolidation, Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			(63)	(41)	(28)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(312,860)	(298,979)	(186,017)
Income Tax Expense (Benefit)			0	0	0
Asset Impairment Charges			0	0
Utility [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions				568,000
Utility [Member] | Group annuity contract purchase | Pension Plan [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			8,000
Utility [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			11,805,802	12,022,944	13,420,804
Utilities Operating Expense, Fuel Used			2,214,471	2,755,793	3,634,394
Utilities Operating Expense, Purchased Power			806,646	904,184	1,478,121
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses			2,851,165	2,838,057	2,899,759
Other Regulatory Charges (Credits) - Net			(6,133)	(138,469)	669,403
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
Income Tax Expense (Benefit)			515,665	(374,847)	(34,263)
Asset Impairment Charges			131,775	79,962
Corporate Segment and Other Operating Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions				275,000
Corporate Segment and Other Operating Segment [Member] | Palisades [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gain (Loss) on Disposition of Assets		$ 166,000
Corporate Segment and Other Operating Segment [Member] | Group annuity contract purchase | Pension Plan [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			320,000
Corporate Segment and Other Operating Segment [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues			73,914	124,509	343,461
Income Tax Expense (Benefit)			(134,638)	(315,688)	(4,715)
Asset Impairment Charges			(24,641)	(37,283)
Corporate Segment and Other Operating Segment [Member] | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(203,097)	(125,018)	(244,949)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(319,675)
Income Tax Expense (Benefit)				275,403
Asset Impairment Charges					165,626
Income Tax Expense (Benefit) on Reconciling Items			$ 66,515	$ 0	$ (36,102)