Rate And Regulatory Matters (Narrative) (Details) - USD ($)		1 Months Ended															8 Months Ended			9 Months Ended		10 Months Ended	11 Months Ended	12 Months Ended		14 Months Ended	24 Months Ended	36 Months Ended
	Oct. 26, 2021	Oct. 31, 2021	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 31, 2020	May 31, 2020	May 31, 2019	Jul. 31, 2017	Dec. 31, 2021	Feb. 28, 2021	Aug. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Jul. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Aug. 31, 2020	Aug. 31, 2024	Aug. 31, 2024	Jun. 30, 2020	Apr. 30, 2020
Impairment of Long-Lived Assets Held-for-use																				$ 345,200,000	$ 16,117,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			$ 2,912,379,000								$ 2,012,030,000									2,912,379,000
Proceeds from the issuance of long-term debt																				6,269,152,000	8,170,607,000
Hurricane Ida
Public Utilities, Property, Plant and Equipment, Construction Work in Progress				$ 1,300,000,000
Regulatory Assets				850,000,000
Minimum [Member] | Hurricane Ida
Total Restoration Costs For Repair and Replacement of Electrical System				2,100,000,000
Maximum [Member] | Hurricane Ida
Total Restoration Costs For Repair and Replacement of Electrical System				2,500,000,000
Entergy Louisiana [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 14,200,000		$ 63,000,000									$ 109,500,000					63,000,000
Regulatory asset related to costs associated with COVID-19 pandemic			59,200,000																	59,200,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			1,908,777,000								667,281,000									1,908,777,000
Proceeds from the issuance of long-term debt																				$ 2,404,102,000	1,800,392,000
Amount transfer from restricted escrow account as storm damage reserve												$ 257,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent																				21.00%
Storm Reserve Escrow Account								$ 290,000,000
Estimated remaining costs for completion of J. Wayne Leonard Power Station										$ 3,100,000
Earned return on common equity				8.45%		8.45%
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount				$ 64,900,000		$ 50,700,000
Aggregate principal amount of system restoration bonds authorization requested			3,180,000,000																	$ 3,180,000,000
ESI Interest income excluded in 2019 FRP filing														$ 251,000
Entergy Louisiana [Member] | Mortgage Bonds Zero Point Six Two Percent Series Due November 2023
Proceeds from the issuance of long-term debt												$ 1,100,000,000
Debt instrument, interest rate, stated percentage												0.62%
Entergy Louisiana [Member] | Winter Storm Uri
Fuel Costs										166,000,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri
Total Restoration Costs For Repair and Replacement of Electrical System								2,060,000,000.00
Non-capital storm costs								380,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent								1,680,000,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs								2,110,000,000
Entergy Louisiana [Member] | Hurricane Ida
Public Utilities, Property, Plant and Equipment, Construction Work in Progress				1,200,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent			1,000,000,000																	1,000,000,000
Incremental principal amount of system restoration bonds issuance authorization requested for Hurricane Ida			1,000,000,000																	1,000,000,000
Regulatory Assets				800,000,000
Entergy Louisiana [Member] | Subsequent Event [Member]
Distribution recovery mechanism - amount per year																												$ 225,000,000
Formula rate plan revenue increase limit - exclusive of riders																											$ 70,000,000
Deferral of expenditures on vegetation management																											$ 7,000,000
Authorized return on common equity																												9.50%
Entergy Louisiana [Member] | Subsequent Event [Member] | Minimum [Member]
Authorized return on common equity																												9.00%
Entergy Louisiana [Member] | Subsequent Event [Member] | Maximum [Member]
Authorized return on common equity																												10.00%
Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount									$ 95,400,000
Rate Increase Included in Formula Rate Plan									$ 44,300,000
Regulatory asset related to costs associated with COVID-19 pandemic			18,200,000																	18,200,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			202,495,000								134,854,000									202,495,000
Proceeds from the issuance of long-term debt																				200,539,000	165,399,000
Public Utilities, Requested Return on Equity, Percentage						6.12%			6.69%
Cap on 2020 retail revenues									2.00%
Demand side management costs									$ 3,900,000
Interim increase in formula rate plan revenues									16,800,000
Interim rate adjustment						$ 1,700,000			1,700,000
Total interim rate adjustments									18,500,000
Interim increase in formula rate plan revenues due to adjustments									22,100,000
Formula rate plan revenue increase including demand side management costs						48,200,000			$ 48,200,000
Public Utilities, Approved Rate Increase (Decrease), Amount						17,500,000
Formula rate plan increase related to COVID-19 non-bad debt expense						3,700,000
Regulatory asset to reflect terms of joint stipulation						$ 19,900,000																$ 19,900,000
Entergy Mississippi [Member] | Maximum [Member]
Public Utilities, Requested Rate Increase (Decrease), Percentage									4.00%
Entergy New Orleans [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 64,000,000
public utilities proposed customer credits																		$ 100
Regulatory asset related to costs associated with COVID-19 pandemic			12,700,000																	12,700,000
Opportunity Sales Refund to be Redirected to Cares Program																													$ 7,000,000
Non-Securitized Storm Reserves Reallocated to Cares Program																													$ 15,000,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			108,818,000								12,460,000									108,818,000
Credits to customer bills resulting from City Council Cares Program			4,300,000																	4,300,000
Proceeds from the issuance of long-term debt																				$ 0	138,930,000
Authorized return on common equity																				9.35%
Storm Reserve Escrow Account			0								83,038,000									$ 0
Withdrawal from storm reserves									$ 44,000,000
Earned return on common equity																				6.26%
Entergy New Orleans [Member] | Hurricane Zeta
Total Restoration Costs For Repair and Replacement of Electrical System							$ 36,000,000
Non-capital storm costs							8,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent							$ 28,000,000
Entergy New Orleans [Member] | Hurricane Ida
Public Utilities, Property, Plant and Equipment, Construction Work in Progress				75,000,000
Withdrawal from storm reserves			39,000,000
Regulatory Assets				45,000,000
Entergy New Orleans [Member] | Electricity [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					40,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount					5,200,000
Entergy New Orleans [Member] | Natural Gas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					18,800,000
Public Utilities, Approved Rate Increase (Decrease), Amount					300,000
Entergy New Orleans [Member] | Maximum [Member]
public utilities proposed customer credits																		$ 400
Entergy New Orleans [Member] | Subsequent Event [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 49,500,000
Entergy New Orleans [Member] | Subsequent Event [Member] | Electricity [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount	34,900,000
Public Utilities, Interim Rate Increase (Decrease), Amount		$ 10,000,000
Customer Refund Liability, Current	17,400,000
Entergy New Orleans [Member] | Subsequent Event [Member] | Natural Gas [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount	$ 14,600,000
Public Utilities, Interim Rate Increase (Decrease), Amount		4,500,000
Entergy Texas [Member]
Regulatory asset related to costs associated with COVID-19 pandemic			12,800,000																	$ 12,800,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			158,458,000								879,908,000									158,458,000
Proceeds from the issuance of long-term debt																				127,931,000	344,110,000
Entergy Texas [Member] | Montgomery County Power Station
Percentage of Undivided Ownership Interest						7.56%
Entergy Texas [Member] | Hurricanes Laura and Delta and Winter Storm Uri
Total Restoration Costs For Repair and Replacement of Electrical System								250,000,000
Non-capital storm costs								50,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent								200,000,000
Amount to be charged to storm reserve and excluded from securitization			4,300,000
Black box amount to be excluded from securitization			5,000,000
Audit attestation costs to be excluded from securitization			300,000
Entergy Texas [Member] | Hurricane Laura
Interim fuel refund for cumulative over-recovery										$ 75,000,000
Entergy Texas [Member] | Hurricane Harvey
Remaining restoration costs for repair and replacement of electrical system; previously-approved								$ 13,000,000
Entergy Arkansas [Member]
Energy Cost Recovery Rider Rate Per kWh																									$ 0.01052
Regulatory asset related to costs associated with COVID-19 pandemic			24,500,000																	24,500,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			401,058,000								234,213,000									401,058,000
Proceeds from the issuance of long-term debt																				708,126,000	1,058,977,000
Provision for rate refund											43,500,000
Net change in required FRP rider revenue					$ 19,400,000
Public Utilities, Requested Return on Equity, Percentage					7.65%			9.65%	9.75%
Earned return on common equity					7.92%
Annual revenue constraint per rate class percentage					4.00%
Reduced proposed increase in revenue requirement to comply with annual revenue constraint					$ 72,400,000
Projected Revenue Deficiency					89,200,000
Formula rate plan revenue increase					$ 108,700,000
Entergy Arkansas [Member] | Subsequent Event [Member]
Energy Cost Recovery Rider Rate Per kWh																								$ 0.00959
Net change in required FRP rider revenue		19,400,000															$ 39,800,000
Reduced proposed increase in revenue requirement to comply with annual revenue constraint		72,100,000
Projected Revenue Deficiency		62,800,000
Formula rate plan revenue increase		82,200,000
System Energy [Member]
Refund of Lease Payments																														$ 17,200,000
Rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback			422,000,000																	422,000,000
Interest Portion of rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback			123,000,000																	123,000,000
Refund related to depreciation expense adjustments			19,000,000																	19,000,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress			97,655,000								59,831,000									97,655,000
Proceeds from the issuance of long-term debt																				565,610,000	$ 859,727,000
Authorized return on common equity									10.94%
FERC requested authorized return on equity for System Energy in return on equity proceeding, rebuttal									9.32%
Percent Equity in Proposed Common Equity Ratio									48.15%
Estimated refund related to FERC proceeding			60,000,000																	60,000,000
Estimated annual rate reduction			45,000,000																	45,000,000
Provision related to FERC proceeding			$ 37,000,000																	$ 37,000,000
One-time accumulated deferred income tax credit											25,200,000
Sale Leaseback Transaction, Net Book Value																														$ 70,000,000
Legacy Entergy Louisiana [Member] | Entergy Louisiana [Member]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount				32,800,000		$ 27,000,000
Legacy Entergy Gulf States Louisiana [Member] | Entergy Louisiana [Member]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount				32,100,000		$ 23,700,000
Grand Gulf [Member] | System Energy [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage																				11.50%
Requested refund of alleged replacement energy costs									$ 360,000,000
Grand Gulf [Member] | System Energy [Member] | Maximum [Member]
Proposed limit on capital improvement project costs before pre-authorization is required									$ 125,000,000
Distribution Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 40,200,000									$ 26,300,000
Revenue increase resulting from incremental revenue																			$ 6,800,000			$ 13,900,000
Transmission Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount													51,000,000
Revenue increase resulting from incremental revenue																							$ 15,100,000			$ 31,600,000
Transmission Cost Recovery Factor Rider [Member] | Entergy Texas [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 66,100,000
Generation Cost Recovery Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount											$ 86,000,000		$ 91,000,000
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member] | ANO Stator Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount																$ 65,900,000