Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended				3 Months Ended				12 Months Ended
	Jan. 01, 2018	May 31, 2022	Oct. 31, 2015	Aug. 31, 2008	Jul. 31, 2008	Dec. 31, 2022	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2015	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2021	Jan. 01, 2020	Sep. 30, 2019	Jan. 01, 2019
Income Taxes [Line Items]
Valuation allowance on the deferred tax assets related to state net operating loss carryovers						$ 372,000					$ 372,000	$ 325,000
Unrecognized tax benefits if recognized, would lower the effective income tax rates						3,254,000	$ 2,208,000				3,254,000	2,256,000	$ 2,208,000
Remaining balances of unrecognized tax benefits, effective income tax rates						3,140,000	3,491,000				3,140,000	3,504,000	3,491,000
Accrued income tax interest and penalties						50,000	44,000				50,000	52,000	44,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense												8,000
Deferred Income Taxes and Tax Credits											(47,154)	248,719	(131,114)
Deferred Tax Assets, Valuation Allowance						372,017					372,017	325,239
Regulatory Liability, Noncurrent						2,324,590					2,324,590	2,643,845
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%													35.00%	35.00%
Regulatory Liability For Income Taxes - Current and Non Current						1,300,000					1,300,000	1,300,000
Net operating loss carryforwards						2,065,149					2,065,149	2,868,424
Deferred Tax Assets, Net of Valuation Allowance						3,643,187					3,643,187	4,963,459
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring											0	0	9,223
Regulatory Liability For Income Taxes Net						1,258,276					1,258,276	1,255,692
Preferred Stock, Value, Issued						0					0	0
Permanent difference and income tax benefit			$ 334,000
Reduction in deferred income tax expense													230,000
Increase in deferred income tax expense													61,000
Miscellaneous tax benefits													13,000
Adjustable taxable income limitation																		50.00%		30.00%
Percent of tax group's consolidated assets that consist of regulated utility property																	90.00%
CARES Act Deferred Tax Expense													64,000
CARES Act annual payroll tax installment due resulting from deferred tax payments						32,000					32,000	32,000
Reduction in unrecognized tax benefits due to decommissioning liability in COGS									$ 1,500,000
Permanent tax reduction due to stock compensation accounting rules								$ 24,700
Unrecognized Tax Expense, Income Tax Penalties and Interest Expense											(2,000)		(4,000)
Deferred Income Tax Assets, Net						84,100					84,100	54,186
Deferred Income Tax Liabilities, Net						4,818,837					$ 4,818,837	4,706,797
Limitation on net operating loss carryforwards resulting from Federal CARES Act											80.00%
Reduction of income tax expense		$ 283,000
Excise tax enacted by inflation reduction act on buyback of public company stock											1.00%
State of Louisiana Enacted Tax Legislation 2021
Income Taxes [Line Items]
Deferred Income Tax Assets, Net						27,000					$ 27,000
Entergy Wholesale Commodities [Member]
Income Taxes [Line Items]
Deferred Income Taxes and Tax Credits													105,000
Increase in deferred income tax expense													105,000
Entergy Arkansas [Member]
Income Taxes [Line Items]
Unrecognized tax benefits if recognized, would lower the effective income tax rates						377,900	259,300				377,900	262,100	259,300
Accrued income tax interest and penalties						4,300	2,300				4,300	2,700	2,300
Deferred Income Taxes and Tax Credits											78,958	100,459	87,019
Regulatory Liability, Noncurrent						475,758					475,758	743,314
Regulatory Liability For Income Taxes - Current and Non Current						15,000	21,000				15,000	11,000	$ 21,000
Net operating loss carryforwards						10,491					10,491	275,054
Deferred Tax Assets, Net of Valuation Allowance						426,708					426,708	740,723
Change in accounting method for tax purposes, effect of change on taxable income														$ 1,800,000
Accrued deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements														2,100,000
Regulatory Liability For Income Taxes Net						435,157					$ 435,157	$ 431,655
State Effective Income Tax Rate, Percent											5.90%	6.20%	6.50%
Permanent tax reduction due to stock compensation accounting rules								4,800
Unrecognized Tax Expense, Income Tax Penalties and Interest Expense													$ (800)
Deferred Income Tax Liabilities, Net						1,498,234					$ 1,498,234	$ 1,416,201
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense											1,600	400
Provision for uncertain tax position						21,000
Entergy Louisiana [Member]
Income Taxes [Line Items]
Unrecognized tax benefits if recognized, would lower the effective income tax rates						720,800	63,800				720,800	66,300	63,800
Accrued income tax interest and penalties						4,100	3,400				4,100	3,700	3,400
Deferred Income Taxes and Tax Credits											(70,379)	175,700	$ (356,256)
Regulatory Liability, Noncurrent						1,037,962					1,037,962	1,042,597
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent													21.00%
Net operating loss carryforwards						307,175					307,175	1,228,547
Deferred Tax Assets, Net of Valuation Allowance						972,964					972,964	2,013,578
Reduction to income tax expense											283,000
Change in accounting method for tax purposes, effect of change on taxable income									2,200,000
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements																$ 2,200,000
Regulatory Liability For Income Taxes Net						337,836					337,836	313,693
Preferred Stock, Dividend Rate, Percentage		7.00%
Reduction in deferred income tax expense													$ 383,000
Reduction to income tax expense due to method of accounting													31,000
Regulatory charge due to prior regulatory settlement - gross													33,000
Regulatory charge due to prior regulatory settlement - net of tax													24,000
Increase (Reduction) in income tax resulting from Act 55 financing settlement								32,000
Reduction of income tax expense due reversal of UTPs								58,000
Regulatory charge due to LPSC Act 55 Financing Order - Gross								29,000
Regulatory charge due to LPSC Act 55 Financing Order - Net of Tax								21,000
Deferred tax liability due to decommissioning liability in COGS									60,000
Decommissioning liability in COGS									221,000
Reduction in unrecognized tax benefits due to decommissioning liability in COGS									1,100,000
Permanent tax reduction due to stock compensation accounting rules								8,600
Unrecognized Tax Expense, Income Tax Penalties and Interest Expense													(10,800)
Deferred Income Tax Liabilities, Net						2,374,878					2,374,878	2,433,854
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense											400	$ 300
Reduction of income tax expense		$ 290,000
Regulatory charge recorded as a result of reduction in income tax expense		224,000									224,000
Regulatory charge recorded as a result of reduction in income tax expense, net of tax		$ 165,000									$ 165,000
Entergy Louisiana [Member] | State of Louisiana Enacted Tax Legislation 2021
Income Taxes [Line Items]
State Effective Income Tax Rate, Percent											7.50%	8.00%
Reduction in deferred income tax expense											$ 6,000
Increase in state tax rate												0.85%
Deferred Income Tax Liabilities, Net						77,000					77,000
Entergy Mississippi [Member]
Income Taxes [Line Items]
Unrecognized tax benefits if recognized, would lower the effective income tax rates						151,200	50,700				151,200	$ 51,700	50,700
Accrued income tax interest and penalties						3,100	1,900				3,100	2,400	1,900
Deferred Income Taxes and Tax Credits											54,850	64,868	36,827
Regulatory Liability, Noncurrent						79,865					79,865	49,313
Net operating loss carryforwards						10,140					10,140	166,008
Deferred Tax Assets, Net of Valuation Allowance						89,483					89,483	240,369
Accrued deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements														$ 1,900,000
Regulatory Liability For Income Taxes Net						202,058					202,058	212,445
Permanent tax reduction due to stock compensation accounting rules								2,700
Deferred Income Tax Liabilities, Net						780,030					780,030	720,097
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense											700	500	200
Entergy New Orleans [Member]
Income Taxes [Line Items]
Unrecognized tax benefits if recognized, would lower the effective income tax rates						310,700	203,500				310,700	228,600	203,500
Accrued income tax interest and penalties						6,400	3,900				6,400	5,200	3,900
Deferred Income Taxes and Tax Credits											18,685	12,573	3,938
Net operating loss carryforwards						12,146					12,146	105,549
Deferred Tax Assets, Net of Valuation Allowance						79,887					79,887	155,805
Reduction to income tax expense													8,000
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements															$ 1,100,000
Regulatory Liability For Income Taxes Net						39,738					39,738	40,589
Permanent tax reduction due to stock compensation accounting rules								1,500
Unrecognized Tax Expense, Income Tax Penalties and Interest Expense													(800)
Deferred Income Tax Liabilities, Net						385,259					385,259	365,384
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense											1,200	1,300
Entergy New Orleans [Member] | State of Louisiana Enacted Tax Legislation 2021
Income Taxes [Line Items]
Reduction in deferred income tax expense											2,000
Deferred Income Tax Liabilities, Net						8,000					8,000
Entergy Texas [Member]
Income Taxes [Line Items]
Unrecognized tax benefits if recognized, would lower the effective income tax rates						3,300	6,100				3,300	2,600	6,100
Accrued income tax interest and penalties						1,100	900				1,100	1,100	900
Deferred Income Taxes and Tax Credits											41,648	48,813	36,033
Regulatory Liability, Noncurrent						45,247					45,247	37,060
Net operating loss carryforwards						27,620					27,620	81
Deferred Tax Assets, Net of Valuation Allowance						77,423					77,423	58,450
Deductible temporary difference related to election to mark-to-market certain power purchase and sales agreements													2,500,000
Regulatory Liability For Income Taxes Net						132,647					132,647	144,145
Permanent tax reduction due to stock compensation accounting rules								2,700
Unrecognized Tax Expense, Income Tax Penalties and Interest Expense													(200)
Deferred Income Tax Liabilities, Net						744,227					744,227	692,496
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense											0	200
System Energy [Member]
Income Taxes [Line Items]
Unrecognized tax benefits if recognized, would lower the effective income tax rates						2,500	500				2,500	1,700	500
Accrued income tax interest and penalties						1,900	11,900				1,900	12,100	11,900
Deferred Income Taxes and Tax Credits											(85,720)	11,191	(455,732)
Regulatory Liability, Noncurrent						665,024					665,024	744,944
Net operating loss carryforwards						20,639					20,639	0
Deferred Tax Assets, Net of Valuation Allowance						294,270					294,270	347,153
Change in accounting method for tax purposes, effect of change on taxable income									1,200,000
Regulatory Liability For Income Taxes Net						110,840					110,840	113,165
Deferred tax liability due to decommissioning liability in COGS									26,000
Decommissioning liability in COGS									102,000
Federal and state taxes payable due to decommissioning liability in COGS									402,000
Reduction in unrecognized tax benefits due to decommissioning liability in COGS									$ 461,000
Permanent tax reduction due to stock compensation accounting rules								$ 1,300
Unrecognized Tax Expense, Income Tax Penalties and Interest Expense											(10,200)		$ (2,600)
Deferred Income Tax Liabilities, Net						376,070					376,070	382,931
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense												200
Entergy Wholesale Commodities [Member]
Income Taxes [Line Items]
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring							$ 9,200
Hurricane Rita [Member] | Entergy Gulf States Louisiana [Member]
Income Taxes [Line Items]
Proceeds from LURC				$ 274,700
Proceed from loan by LCDA to corporation LURC				$ 274,700
Hurricane Rita [Member] | Entergy Louisiana [Member]
Income Taxes [Line Items]
Proceeds from LURC					$ 679,000
Proceed from loan by LCDA to corporation LURC					$ 679,000
Subsequent Event [Member] | Entergy Arkansas [Member]
Income Taxes [Line Items]
State Effective Income Tax Rate, Percent										5.30%
Internal Restructuring Guaranteed Credits to Customers [Member] | Entergy Arkansas [Member]
Income Taxes [Line Items]
Regulatory Liability, Noncurrent						$ 13,200					$ 13,200	$ 19,800
Preferred Stock, Five Point Three Seven Five Percent, Series A [Member] | Entergy Texas [Member]
Income Taxes [Line Items]
Preferred Stock, Value, Issued																			$ 35,000
Preferred Stock, Liquidation Preference Per Share																			$ 25