Income Taxes (Narrative) (Details) - USD ($)			1 Months Ended							3 Months Ended				12 Months Ended									120 Months Ended	180 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Nov. 30, 2024	Sep. 30, 2024	Aug. 31, 2024	Dec. 31, 2023	Oct. 31, 2023	Mar. 31, 2023	May 31, 2022	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2012	Dec. 31, 2026	Jan. 01, 2025	Apr. 30, 2024
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						$ 1,899,000,000				$ 1,900,000,000		$ 1,899,000,000		$ 1,900,000,000	$ 1,899,000,000	$ 3,254,000,000
Remaining Balances Of Unrecognized Tax Benefits						541,000,000				455,000,000		541,000,000		455,000,000	541,000,000	3,140,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														(7,000,000)	(11,000,000)	$ 8,000,000
Reduction of income tax expense from the reversal of provisions for uncertain tax positions				$ 9,000,000
Reduction of income tax expense due reversal of UTPs												288,000,000
Decrease in operating loss carryforward						8,000,000,000						8,000,000,000			8,000,000,000
Tax liability resulting from audit adjustments						79,000,000						79,000,000			79,000,000
Interest accrued on taxes in excess of deposits						13,000,000						13,000,000			13,000,000
Regulatory Liability, Noncurrent						3,116,926,000				3,609,463,000		3,116,926,000		$ 3,609,463,000	3,116,926,000
Reversal of interest expense related to the allowance of previously unrecognized tax benefits						24,000,000						24,000,000			$ 24,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%												21.00%	21.00%	21.00%					35.00%
Regulatory Liability For Income Taxes - Current and Non Current						1,000,000,000.0				1,200,000,000		1,000,000,000.0		$ 1,200,000,000	$ 1,000,000,000.0
Excise tax enacted by inflation reduction act on buyback of public company stock																1.00%
Reduction of income tax expense								$ 129,000,000	$ 283,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						39,000,000				32,000,000		39,000,000		32,000,000	39,000,000	$ 50,000,000
Deferred Tax Assets, Valuation Allowance						372,119,000				338,508,000		372,119,000		338,508,000	372,119,000
Increase (Decrease) in Regulatory Liabilities														660,559,000	463,805,000	(266,559,000)
Income Taxes Paid				8,000,000
Income Tax Expense (Benefit)				9,000,000										381,027,000	(690,535,000)	(38,978,000)
Increase in income tax expense resulting from net reduction in certain deferred tax assets and liabilities										12,100,000
Rate per kWh in calculating nuclear production tax credits										0.003				0.003
Multiplication factor for calculation of nuclear production tax credit										5				5
Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Entergy New Orleans and Entergy Louisiana natural gas distribution businesses [Member]
Disposal Group, Assets, Regulatory Asset, Noncurrent										35,381,000				35,381,000
Qualified Plan [Member] | Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Entergy New Orleans and Entergy Louisiana natural gas distribution businesses [Member] | Pension Plan [Member]
Disposal Group, Assets, Regulatory Asset, Noncurrent										13,900,000				13,900,000
Entergy Arkansas [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						57,200,000				32,600,000		57,200,000		32,600,000	57,200,000	377,900,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														600,000	3,500,000	1,600,000
Reduction of income tax expense from the reversal of provisions for uncertain tax positions				18,000,000								156,000,000
Reduction to income tax expense due to method of accounting																			$ 1,800,000,000
Decommissioning liability in COGS						102,000,000						102,000,000			102,000,000
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements																				$ 2,000,000,000
Accrued increase to tax expense from the settlement of mark-to-market tax position						40,000,000						40,000,000			40,000,000
Miscellaneous excess ADIT as result of 2016-2018 audit resolution						5,000,000						5,000,000			5,000,000
Decrease in operating loss carryforward						4,000,000,000						4,000,000,000			4,000,000,000
Regulatory Liability, Noncurrent						759,181,000				831,165,000		759,181,000		$ 831,165,000	759,181,000
Regulatory asset for income tax associated with deficient ADIT						35,000,000						35,000,000			35,000,000
Provision for uncertain tax position										$ 21,000,000
State Effective Income Tax Rate, Percent										4.30%				4.30%					6.50%
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						7,800,000				$ 8,400,000		7,800,000		$ 8,400,000	7,800,000	4,300,000
Increase (Decrease) in Regulatory Liabilities														97,049,000	240,762,000	(264,054,000)
Reduction/(increase) in income tax expense as a result of the reversal of net deferred credits												9,000,000
Income Tax Expense (Benefit)														74,574,000	(99,210,000)	80,896,000
Entergy Arkansas [Member] | Walnut Bend Solar facility [Member]
Solar production tax credits										5,000,000				5,000,000
Entergy Mississippi [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						1,000,000.0				1,300,000		1,000,000.0		1,300,000	1,000,000.0	151,200,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														1,100,000	(1,000,000.0)	700,000
Reduction of income tax expense from the reversal of provisions for uncertain tax positions												1,000,000
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements																				$ 2,000,000,000
Decrease in operating loss carryforward						2,000,000,000						2,000,000,000			2,000,000,000
Regulatory Liability, Noncurrent						33,696,000				59,544,000		33,696,000		59,544,000	33,696,000
Regulatory asset for income tax associated with deficient ADIT						3,000,000						3,000,000			3,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						2,100,000				3,200,000		2,100,000		3,200,000	2,100,000	3,100,000
Increase (Decrease) in Regulatory Liabilities														17,985,000	(59,513,000)	20,165,000
Reduction/(increase) in income tax expense as a result of the reversal of net deferred credits												(2,000,000)
Income Tax Expense (Benefit)														80,315,000	54,364,000	54,864,000
Entergy New Orleans [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						18,200,000				18,300,000		18,200,000		18,300,000	18,200,000	310,700,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														0	(5,800,000)	1,200,000
Reduction of income tax expense from the reversal of provisions for uncertain tax positions												6,000,000
Reduction of income tax expense from the reversal of a tax gain												39,000,000
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements																					$ 1,000,000,000
Reduction of income tax expense due reversal of UTPs												139,000,000
Decrease in operating loss carryforward						1,000,000,000						1,000,000,000			1,000,000,000
Regulatory Liability, Noncurrent						90,434,000				$ 260,312,000		90,434,000		$ 260,312,000	90,434,000
State Effective Income Tax Rate, Percent										7.50%				7.50%
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						600,000				$ 600,000		600,000		$ 600,000	600,000	6,400,000
Increase (Decrease) in Regulatory Liabilities														175,808,000	66,022,000	(8,639,000)
Reduction/(increase) in income tax expense as a result of the reversal of net deferred credits												2,000,000
Income Tax Expense (Benefit)														2,842,000	(189,973,000)	24,277,000
Increase in income tax expense resulting from net reduction in certain deferred tax assets and liabilities										200,000
Entergy Louisiana [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						862,500,000				868,200,000		862,500,000		868,200,000	862,500,000	720,800,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														3,600,000	(2,600,000)	400,000
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements																						$ 2,000,000,000
Reduction of income tax expense due reversal of UTPs												132,000,000
Decrease in operating loss carryforward						1,000,000,000						1,000,000,000			1,000,000,000
Regulatory Liability, Noncurrent						1,407,689,000				$ 1,692,547,000		1,407,689,000		$ 1,692,547,000	1,407,689,000
Regulatory asset for income tax associated with deficient ADIT						2,000,000						2,000,000			2,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%																				35.00%
State Effective Income Tax Rate, Percent										7.50%				7.50%
Reduction of income tax expense								133,000,000	290,000,000
Regulatory charge recorded as a result of reduction in income tax expense									224,000,000				$ 103,000,000
Regulatory charge recorded as a result of reduction in income tax expense, net of tax									165,000,000				$ 76,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						1,500,000				$ 5,100,000		1,500,000		$ 5,100,000	1,500,000	4,100,000
Customer rate credits																							$ 11,000,000
Increase (Decrease) in Regulatory Liabilities								103,000,000	224,000,000					452,731,000	225,645,000	(4,783,000)
Reduction/(increase) in income tax expense as a result of the reversal of net deferred credits												42,000,000
Income Tax Expense (Benefit)														225,409,000	(205,781,000)	(162,853,000)
Increase in income tax expense resulting from net reduction in certain deferred tax assets and liabilities										16,300,000
Increase (decrease) in regulatory liabilities (net of tax)								$ 76,000,000	$ 165,000,000
Entergy Louisiana [Member] | Excess accumulated deferred income taxes as a result of the Tax Cuts and Jobs Act [Member]
Increase (Decrease) in Regulatory Assets and Liabilities							$ 106,000,000
Entergy Louisiana [Member] | 2023 Entergy Louisiana Rate Case and Formula Rate Plan Extension Request [Member]
Customer rate credits				$ 184,000,000	$ 184,000,000
System Energy [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						3,100,000				4,000,000.0		3,100,000		4,000,000.0	3,100,000	2,500,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														1,000,000.0	0	(10,200,000)
Decrease in operating loss carryforward						40,000,000						40,000,000			40,000,000
Regulatory Liability, Noncurrent						782,912,000				747,190,000		782,912,000		747,190,000	782,912,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						1,900,000				2,900,000		1,900,000		2,900,000	1,900,000	1,900,000
Increase (Decrease) in Regulatory Liabilities														(37,713,000)	11,009,000	21,252,000
Reduction/(increase) in income tax expense as a result of the reversal of net deferred credits												1,000,000
Income Tax Expense (Benefit)														29,503,000	32,032,000	(92,828,000)
Entergy Texas [Member]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate						2,900,000				50,300,000		2,900,000		50,300,000	2,900,000	3,300,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense														500,000	(1,100,000)	0
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements																		$ 2,500,000,000
Regulatory Liability, Noncurrent						43,013,000				18,705,000		43,013,000		18,705,000	43,013,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued						0				500,000		0		500,000	0	1,100,000
Increase (Decrease) in Regulatory Liabilities														(45,301,000)	(20,122,000)	(30,499,000)
Reduction/(increase) in income tax expense as a result of the reversal of net deferred credits												2,000,000
Income Tax Expense (Benefit)														65,684,000	62,872,000	50,621,000
Subsequent Event [Member] | Entergy New Orleans [Member]
State Effective Income Tax Rate, Percent																									5.50%
Subsequent Event [Member] | Entergy Louisiana [Member]
State Effective Income Tax Rate, Percent																									5.50%
Customer rate credits																								$ 20,235,000
Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member]
Regulatory Liability, Noncurrent						98,000,000.0				163,300,000		98,000,000.0		163,300,000	98,000,000.0
Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member] | Entergy New Orleans [Member]
Regulatory Liability, Noncurrent						60,000,000.0				138,000,000.0	$ 138,000,000	60,000,000.0		138,000,000.0	60,000,000.0											$ 138,000,000
Increase (Decrease) in Regulatory Liabilities											78,000,000
Regulatory charge, net of tax						44,000,000					$ 57,000,000
Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member] | Entergy Louisiana [Member]
Regulatory Liability, Noncurrent						38,000,000.0				$ 25,300,000		38,000,000.0		25,300,000	38,000,000.0
Regulatory charge, net of tax						28,000,000
Credits expected to be shared with customers from resolution of the 2016-2018 IRS audit [Member] | Entergy Louisiana [Member] | 2023 Entergy Louisiana Rate Case and Formula Rate Plan Extension Request [Member]
Regulatory Liability, Noncurrent						$ 38,000,000						$ 38,000,000			38,000,000
Income taxes | Entergy Arkansas [Member]
Increase (Decrease) in Regulatory Liabilities														$ 29,000,000	$ 26,000,000	$ 15,000,000	$ 32,000,000
Income taxes | Entergy New Orleans [Member]
Increase (Decrease) in Regulatory Liabilities			$ 9,000,000
Income taxes | Entergy Louisiana [Member]
Increase (Decrease) in Regulatory Liabilities			$ 179,000,000