Rate And Regulatory Matters (Narrative) (Details)		1 Months Ended																				3 Months Ended			9 Months Ended			12 Months Ended				13 Months Ended	36 Months Ended	57 Months Ended
	Nov. 01, 2023	Oct. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Aug. 31, 2023 USD ($)	Jul. 31, 2023 USD ($)	Jun. 30, 2023 USD ($) $ / unit	May 31, 2023 USD ($)	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) shares	Jan. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 30, 2022 USD ($)	Oct. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Aug. 31, 2022 USD ($)	Jul. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Apr. 30, 2022 USD ($)	Oct. 31, 2021 USD ($)	Mar. 31, 2021	Dec. 31, 1988	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) shares	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Jul. 31, 2020 USD ($)
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			$ 2,296,265,000								$ 1,844,171,000											$ 2,296,265,000			$ 2,296,265,000	$ 1,844,171,000				$ 1,844,171,000
Proceeds from the issuance of long-term debt																									3,605,237,000		$ 5,316,693,000
Storm Reserve Escrow Account			416,274,000								401,955,000											416,274,000			416,274,000	401,955,000				401,955,000
Regulatory Assets, Noncurrent			5,690,179,000								6,036,397,000											5,690,179,000			5,690,179,000	6,036,397,000				6,036,397,000
Long-term Transition Bond, Noncurrent			278,286,000								292,760,000											278,286,000			278,286,000	292,760,000				292,760,000
Deferred Fuel Cost			188,885,000								710,401,000											188,885,000			188,885,000	710,401,000				710,401,000
Replacement Reserve Escrow			416,000,000								402,000,000											416,000,000			416,000,000	402,000,000				402,000,000
Asset Impairment Charges																						38,078,000		$ (143,000)	38,078,000		(163,464,000)
Storm Costs
Public Utilities, Approved Rate Increase (Decrease), Amount			500,000
Indian Point
Proceeds from Legal Settlements				$ 40,000,000
Litigation Settlement, Amount Awarded from Other Party					$ 59,000,000
Entergy Louisiana [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			587,658,000								736,969,000											587,658,000			587,658,000	736,969,000				736,969,000
Proceeds from the issuance of long-term debt																									1,196,927,000		2,673,246,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs																		$ 2,640,000,000
Storm Reserve Escrow Account			303,869,000								293,406,000											303,869,000			303,869,000	293,406,000				293,406,000
Regulatory Assets, Noncurrent			1,665,315,000								2,056,179,000											1,665,315,000			1,665,315,000	2,056,179,000				2,056,179,000
Deferred Fuel Cost			26,093,000								159,183,000											26,093,000			26,093,000	159,183,000				159,183,000
Replacement Reserve Escrow			303,900,000								293,400,000											303,900,000			$ 303,900,000	293,400,000				293,400,000
LURC's percentage of annual dividends																									1.00%
ELL's percentage of annual dividends																							99.00%		99.00%
Proceeds from Contributed Capital																									$ 1,457,676,000		1,000,000,000
Regulatory charge recorded as a result of reduction in income tax expense																							$ 103,000,000
Regulatory charge recorded as a result of reduction in income tax expense, net of tax																							76,000,000
Reduction to income tax expense - net of provision for uncertain tax positions																							133,000,000
Reduction to income tax expense - net, offset by other tax charges																							$ 129,000,000
Entergy Louisiana [Member] | Restoration Law Trust II (storm trust II) [Member]
LURC's beneficial interest in the storm trust, percentage									1.00%														1.00%						1.00%
Preferred Stock, Dividend Rate, Percentage									7.50%
Preferred Stock, Liquidation Preference, Value									$ 100														$ 100						$ 100
Class preferred non voting membership interest units acquired in wholly owned subsidiary | shares									14,576,757.48														14,576,757.48						14,576,757.48
Entergy Louisiana [Member] | Deferred COVID 19 Costs
Regulatory Assets			47,800,000																			47,800,000			47,800,000
Amount of long-term debt proposed to be used to generate earnings to reduce certain regulatory assets								$ 1,600,000,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri
Carrying costs associated with storm restoration costs																										3,000,000
Entergy Louisiana [Member] | Hurricane Ida
Carrying costs associated with storm restoration costs																										57,000,000
Entergy Louisiana [Member] | Hurricane Ida
Total Restoration Costs For Repair and Replacement of Electrical System													$ 2,640,000,000					2,540,000,000
Non-capital storm costs																		586,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent									$ 1,000,000,000									1,960,000,000					$ 1,000,000,000						$ 1,000,000,000				$ 1,000,000,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs																		2,600,000,000
Carrying costs associated with storm restoration costs													$ 59,100,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri
Total Restoration Costs For Repair and Replacement of Electrical System											2,570,000,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs																		$ 32,000,000
Carrying costs associated with storm restoration costs											59,200,000
Aggregate principal amount of system restoration bonds authorization requested										$ 1,491,000,000	1,657,000,000															1,657,000,000				1,657,000,000
aggregate principal amount of system restoration bond authorization approved									1,491,000,000														1,491,000,000						1,491,000,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri | Storm Costs
Regulatory Assets									180,000,000														180,000,000						180,000,000
Entergy Mississippi [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			249,991,000								170,191,000											249,991,000			249,991,000	170,191,000				170,191,000
Proceeds from the issuance of long-term debt																									396,853,000		249,298,000
Storm Reserve Escrow Account			34,694,000								33,549,000											34,694,000			34,694,000	33,549,000				33,549,000
Regulatory Assets, Noncurrent			555,430,000								519,460,000											555,430,000			555,430,000	519,460,000				519,460,000
Deferred Fuel Cost			0								143,211,000											0			0	143,211,000				143,211,000
Replacement Reserve Escrow			34,700,000								33,500,000											34,700,000			34,700,000	33,500,000				33,500,000
Entergy New Orleans [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			31,152,000								39,607,000											31,152,000			31,152,000	39,607,000				39,607,000
Proceeds from the issuance of long-term debt																									14,630,000		0
Storm Reserve Escrow Account			77,712,000								75,000,000											77,712,000			77,712,000	75,000,000				75,000,000
Regulatory Assets, Noncurrent			193,515,000								202,112,000											193,515,000			193,515,000	202,112,000				202,112,000
Long-term Transition Bond, Noncurrent			11,806,000								17,697,000											11,806,000			11,806,000	17,697,000				17,697,000
Deferred Fuel Cost			2,128,000								10,153,000											2,128,000			2,128,000	10,153,000				10,153,000
Replacement Reserve Escrow			77,700,000								75,000,000.0											77,700,000			77,700,000	75,000,000.0				75,000,000.0
Entergy New Orleans [Member] | Hurricane Ida
Total Restoration Costs For Repair and Replacement of Electrical System																	$ 170,000,000
Carrying costs associated with storm restoration costs																										9,000,000
Replacement Reserve Escrow																																			$ 39,000,000
Estimated costs included in filing for total restoration costs for repair and replacement of electrical system																	11,000,000
storm securitization costs approved for securitization allocated to Hurricane Ida														$ 125,000,000
Excess withdrawn replacement reserve escrow																																			$ 7,000,000
Storm Restoration Costs Deemed Prudently Incurred				164,100,000
Carrying costs associated with storm restoration costs deemed prudently incurred				7,500,000
Credits available to be applied to future storm costs				900,000
Storm costs deemed previously recovered through base rates				1,200,000
Entergy Texas [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			784,116,000								339,139,000											784,116,000			784,116,000	339,139,000				339,139,000
Proceeds from the issuance of long-term debt																									344,966,000		606,444,000
Regulatory Assets, Noncurrent			596,679,000								578,682,000											596,679,000			596,679,000	578,682,000				578,682,000
Long-term Transition Bond, Noncurrent			266,480,000								275,064,000											266,480,000			266,480,000	275,064,000				275,064,000
Deferred Fuel Cost			160,664,000								258,115,000											160,664,000			160,664,000	258,115,000				258,115,000
Entergy Texas [Member] | Certain receipts under affiliated PPAs
Regulatory Liabilities				21,900,000
Entergy Arkansas [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			479,889,000								417,244,000											479,889,000			479,889,000	417,244,000				417,244,000
Proceeds from the issuance of long-term debt																									991,606,000		225,625,000
Regulatory Assets, Noncurrent			1,879,619,000								1,810,281,000											1,879,619,000			1,879,619,000	1,810,281,000				1,810,281,000
Deferred Fuel Cost			0								139,739,000											0			0	139,739,000				139,739,000
Litigation Settlement, Amount Awarded from Other Party																															$ 21,000,000
Asset Impairment Charges																						78,434,000		$ 0	78,434,000		0
Entergy Arkansas [Member] | Deferred COVID 19 Costs
Regulatory Assets			39,000,000																			39,000,000			39,000,000
Entergy Arkansas [Member] | Deferred Fuel Costs
Asset Impairment Charges																						68,900,000
Entergy Arkansas [Member] | 2021 February Winter Storms
Deferred Fuel Cost									32,000,000														$ 32,000,000						32,000,000
System Energy [Member]
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			105,468,000								102,987,000											105,468,000			105,468,000	102,987,000				102,987,000
Proceeds from the issuance of long-term debt																									662,965,000		$ 955,587,000
Regulatory Assets, Noncurrent			439,419,000								415,121,000											439,419,000			439,419,000	415,121,000				415,121,000
Potential settlement refund																	353,000,000
Additional unprotected excess ADIT related to uncertain decommissioning tax deduction											147,000,000															147,000,000				147,000,000						$ 147,000,000
Regulatory Liability related to potential settlement refund			270,000,000														588,000,000					270,000,000			$ 270,000,000
Estimated Litigation Liability																	37,000,000
Regulatory charge related to System Energy settlement																	551,000,000					40,000,000
Regulatory charge related to System Energy settlement - net of tax																	413,000,000
System Energy [Member] | Subsequent Event [Member]
Authorized return on common equity	9.65%
Public Utilities, Approved Equity Capital Structure, Percentage	52.00%
Grand Gulf [Member] | Entergy Mississippi [Member]
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased																									40.00%
Grand Gulf [Member] | System Energy [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage																									11.50%
Grand Gulf [Member] | Entergy Arkansas and and Entergy Mississippi [Member]
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased																									65.00%
Generation Cost Recovery Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount															$ 92,800,000
Public Utilities, Interim Rate Increase (Decrease), Amount														$ 5,700,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy Louisiana [Member]
Proceeds from Legal Settlements										27,800,000
Payments for Legal Settlements										18,200,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy Mississippi [Member]
Allocated sale-leaseback annual renewal costs																									$ 5,700,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy New Orleans [Member]
Proceeds from Legal Settlements										34,000,000
Payments for Legal Settlements										22,300,000
Grand Gulf Sale-leaseback Renewal Complaint | Entergy Arkansas [Member]
Proceeds from Legal Settlements										41,700,000															50,000,000
Cumulative proceeds awarded from legal settlements																									142,000,000
Grand Gulf Sale-leaseback Renewal Complaint | System Energy [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage																					11.50%
Payments for Legal Settlements										103,500,000
Disallowance of future sale-leaseback renewal costs recovery																														11,500,000
Calculated refund of sale-leaseback renewal rental costs, including interest										89,800,000
One-time accumulated deferred income tax credit																																		$ 25,200,000
Calculated net refund for excess depreciation expense										13,700,000
Grand Gulf Sale-leaseback Renewal Complaint | System Energy [Member] | Sale-leaseback and depreciation-related refunds due [Member]
Regulatory Assets			40,500,000																			40,500,000			40,500,000
Grand Gulf Sale-leaseback Renewal Complaint | System Energy [Member] | Subsequent Event [Member]
Proceeds from Legal Settlements		$ 67,800,000
Recalculated Payments for Legal Settlements		35,700,000
Waived proceed from legal settlement resulting from compliance filing		27,300,000
Unit Power Sales Agreement Complaint | Entergy Arkansas [Member]
Proceeds from Legal Settlements										$ 41,700,000
Unit Power Sales Agreement Complaint | System Energy [Member]
Potential settlement refund												$ 18,000,000
FERC ALJ initial decision recommended refunds																									116,000,000
Interest component of FERC ALJ initial decision recommended refunds																									147,000,000
FERC ALJ initial decision modification to cash working capital allowance							$ 36,400,000
2022 Base Rate Case | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				54,000,000			54,000,000									$ 131,400,000
Rate case expenses to be recovered from customers through a rider							4,800,000
2022 Base Rate Case | Entergy Texas [Member] | 2022 Rate Case Settlement Relate Back
Regulatory Liabilities				8,900,000
2022 Base Rate Case | Entergy Texas [Member] | Deferred COVID 19 Costs
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 3,400,000
2022 Base Rate Case | Entergy Texas [Member] | Other Regulatory Assets (Liabilities)
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 14,500,000
2022 Base Rate Case | Entergy Texas [Member] | Subsequent Event [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount		24,600,000
Fuel reconciliation | Entergy Texas [Member]
Eligible fuel and purchased power expenses, net of certain revenues credited to such expenses and other adjustments																																	1,700,000,000
Deferred fuel under-recovery balance, including interest, for reconciliation period																																	103,100,000
Margins from off-system sales made during the reconciliation period					9,300,000
Deferred fuel under-recovery balance, including interest, for reconciliation period per settlement																																	$ 99,700,000
Fuel reconciliation | Entergy Texas [Member] | Winter Storm Uri
Proposed disallowance for fuel purchase									5,200,000
2022 Look-back Filing [Member] | Entergy Mississippi [Member]
Regulatory Assets, Noncurrent						$ 800,000
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount									19,800,000
Requested refund for true-up of demand-side management costs									1,300,000
Earned return on rate base							6.10%
2022 Look-back Filing [Member] | Entergy Mississippi [Member] | Formula Rate Plan Historical Year Rate Adjustment Member
Regulatory Assets, Noncurrent											$ 18,200,000															$ 18,200,000				$ 18,200,000
2022 Look-back Filing [Member] | Entergy Mississippi [Member] | Maximum [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount								$ 27,900,000
Public Utilities, Interim Rate Increase (Decrease), Percentage								2.00%
2022 Look-back Filing [Member] | Entergy Mississippi [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount																																$ 19,000,000
2023 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount									$ 39,800,000
Public Utilities, Requested Return on Equity, Percentage									6.67%
Public Utilities, Approved Rate Increase (Decrease), Amount							$ 26,500,000
2023 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member] | Natural Gas, US Regulated [Member]
Oil and Gas, Average Production Cost Per Unit | $ / unit						4.50
2023 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					500,000			$ 25,600,000
Authorized return on common equity								9.35%
Requested reduction to formula rate plan revenues resulting from alleged errors					8,300,000
Proposed formula rate plan rate mitigation through offsets to regulatory liabilities					12,000,000
Reduction to formula rate plan revenues related to customer credits			8,900,000
2023 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Electricity [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 17,400,000
Earned return on common equity								7.34%
Additional revenue increase due to previously approved amounts								$ 3,400,000
Public Utilities, Approved Rate Increase (Decrease), Amount			10,500,000
2023 Formula Rate Plan Filing [Member] | Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 8,200,000
Earned return on common equity								3.52%
Public Utilities, Approved Rate Increase (Decrease), Amount			6,900,000
2023 Formula Rate Plan Filing [Member] | Entergy Arkansas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					130,300,000
Projected Revenue Deficiency					$ 80,500,000
Prospective return on common equity opportunity					8.11%
2023 Formula Rate Plan Filing [Member] | Entergy Arkansas [Member] | Maximum [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 88,600,000
Annual revenue constraint per rate class percentage					4.00%
2023 Formula Rate Plan Filing [Member] | Entergy Arkansas [Member] | Subsequent Event [Member] | Maximum [Member]
Adjusted Public Utilities Requested Rate Increase Decrease Amount Per Service Commission		$ 87,700,000
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member]
Earned return on common equity																				10.94%
Recommended adjustment to earned return on equity																				9.32%
Return on equity complaint, estimated annual rate reduction			29,000,000																			29,000,000			29,000,000
Payments for Legal Settlements																									$ 40,000,000
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member] | Maximum [Member]
ALJ recommended equity capital structure, percentage																				48.15%
2022 Formula Rate Plan | Entergy Arkansas [Member]
Earned return on common equity					7.29%
Projected Revenue Deficiency					$ 49,800,000
Entergy Cost Recovery Rider | Entergy Arkansas [Member]
Energy Cost Recovery Rider Rate Per kWh																													$ 0.01639
Entergy Cost Recovery Rider | Entergy Arkansas [Member] | Subsequent Event [Member]
Energy Cost Recovery Rider Rate Per kWh																												$ 0.01883
Requested Energy Cost Recovery Rider Rate Per kWh																												$ 0.01883
2022 Formula Rate Plan Filing | Entergy Louisiana [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 70,700,000
Earned return on common equity							8.33%
Projected Revenue Deficiency							$ 65,900,000
Prospective return on common equity opportunity							8.38%
Distribution recovery mechanism revenue requirement							$ 6,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount							85,200,000
2022 Formula Rate Plan Filing | Entergy Louisiana [Member] | Maximum [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 4,900,000
Annual power management rider [Member] | Entergy Mississippi [Member]
Regulatory Assets, Noncurrent						$ 4,100,000
Grid modernization rider [Member] | Entergy Mississippi [Member]
Regulatory Assets, Noncurrent						$ 4,300,000
2023 Rate Case Entergy Louisiana | Entergy Louisiana [Member]
Prospective return on common equity opportunity				10.50%
Projected increase in revenue requirement				$ 430,000,000
One-time customer credits				$ 17,000,000
2023 Formula Rate Plan Extention Proposal Entergy Louisiana | Entergy Louisiana [Member]
Prospective return on common equity opportunity				10.00%
Projected increase in revenue requirement				$ 173,000,000
One-time customer credits				$ 17,000,000
Request for Extension and Modification of Formula Rate Plan | Entergy New Orleans [Member] | Subsequent Event [Member] | Maximum [Member]
Public Utilities, Approved Equity Capital Structure, Percentage		55.00%
Grand Gulf Prudence Complaint [Member] | System Energy, Entergy Services, and Entergy Operations [Member]
Loss Contingency, Damages Sought, Value			$ 1,000,000,000
System Energy Formula Rate Annual Protocols Formal Challenge | Entergy Mississippi [Member]
Payments for Legal Settlements																	$ 235,000,000
Depreciation Amendment Proceeding [Member] | System Energy [Member]
Reduction to depreciation expense resulting from differences in depreciation rates																						$ 41,000,000
Pension Costs Amendment Proceeding [Member] | System Energy [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount																			$ 8,900,000
Test Years 2017-2021 Formula Rate Plan Filings [Member] | Entergy Louisiana [Member] | Subsequent Event [Member]
One-time customer credits		$ 5,800,000
Test Years 2017-2021 Formula Rate Plan Filings [Member] | Entergy Louisiana [Member] | Subsequent Event [Member] | Associated with Late Fees from 2016 Flood [Member]
Increase (Decrease) in Regulatory Assets and Liabilities		$ 6,200,000