Rate And Regulatory Matters (Narrative) (Details) - USD ($)	1 Months Ended									6 Months Ended		8 Months Ended			12 Months Ended				14 Months Ended	24 Months Ended		36 Months Ended
	Jul. 31, 2021	Jun. 30, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 31, 2020	May 31, 2019	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2021	Feb. 28, 2021	Aug. 31, 2020	Dec. 31, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020	Aug. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Jul. 30, 2021	Apr. 30, 2020
Regulatory Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use										$ 345,339,000	$ 11,735,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 1,383,758,000				$ 2,012,030,000				1,383,758,000								$ 2,012,030,000
Proceeds from the issuance of long-term debt										5,008,330,000	5,201,010,000
Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount		63,000,000							$ 109,500,000	63,000,000
Regulatory asset related to costs associated with COVID-19 pandemic		54,700,000								54,700,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 577,975,000				667,281,000				577,975,000								667,281,000
Proceeds from the issuance of long-term debt										2,097,214,000	1,401,887,000
Amount transfer from restricted escrow account as storm damage reserve							$ 257,000,000
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%
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 50,700,000
Entergy Louisiana [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri [Domain]
Regulatory Assets [Line Items]
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] | Mortgage Bonds Zero Point Six Two Percent Series Due November 2023
Regulatory Assets [Line Items]
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
Regulatory Assets [Line Items]
Fuel Costs					$ 166,000,000
Entergy Louisiana [Member] | Subsequent Event [Member]
Regulatory Assets [Line Items]
Distribution recovery mechanism - amount per year																						$ 225,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent																						21.00%
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%
Aggregate principal amount of system restoration bonds authorization requested																							$ 2,180,000,000
Entergy Louisiana [Member] | Subsequent Event [Member] | Minimum [Member]
Regulatory Assets [Line Items]
Authorized return on common equity																						9.00%
Entergy Louisiana [Member] | Subsequent Event [Member] | Maximum [Member]
Regulatory Assets [Line Items]
Authorized return on common equity																						10.00%
Entergy Mississippi [Member]
Regulatory Assets [Line Items]
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		19,300,000								19,300,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 172,783,000				134,854,000				172,783,000								134,854,000
Proceeds from the issuance of long-term debt										200,543,000	165,408,000
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]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Percentage				4.00%
Entergy New Orleans [Member]
Regulatory Assets [Line Items]
public utilities proposed customer credits													$ 100
Regulatory asset related to costs associated with COVID-19 pandemic		13,800,000								13,800,000
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		29,053,000				12,460,000				29,053,000								$ 12,460,000
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	138,939,000
Authorized return on common equity																		9.35%
Storm Reserve Escrow Account		38,846,000				83,038,000				38,846,000								$ 83,038,000
Withdrawal from storm reserves				$ 44,000,000
Earned return on common equity																		6.26%
Entergy New Orleans [Member] | Hurricane Zeta [Domain]
Regulatory Assets [Line Items]
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] | Maximum [Member]
Regulatory Assets [Line Items]
public utilities proposed customer credits													$ 400
Entergy New Orleans [Member] | Subsequent Event [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 64,000,000
Entergy New Orleans [Member] | Subsequent Event [Member] | Electricity [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	40,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount	5,200,000
Entergy New Orleans [Member] | Subsequent Event [Member] | Natural Gas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	18,800,000
Public Utilities, Approved Rate Increase (Decrease), Amount	300,000
Entergy Texas [Member]
Regulatory Assets [Line Items]
Regulatory asset related to costs associated with COVID-19 pandemic		14,200,000								14,200,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		181,473,000				879,908,000				181,473,000								$ 879,908,000
Proceeds from the issuance of long-term debt										0	194,256,000
Entergy Texas [Member] | Hurricanes Laura and Delta and Winter Storm Uri
Regulatory Assets [Line Items]
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
Entergy Texas [Member] | Hurricane Laura [Member]
Regulatory Assets [Line Items]
Interim fuel refund for cumulative over-recovery					$ 75,000,000
Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount																		19,400,000
Energy Cost Recovery Rider Rate Per kWh																	$ 0.01052
Regulatory asset related to costs associated with COVID-19 pandemic		11,200,000								11,200,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		319,379,000				234,213,000				319,379,000								234,213,000
Proceeds from the issuance of long-term debt										694,137,000	335,902,000
Provision for rate refund						43,500,000												$ 43,500,000
Public Utilities, Requested Return on Equity, Percentage			9.65%	9.75%
Earned return on common equity																		7.92%
Entergy Arkansas [Member] | Subsequent Event [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 108,700,000														$ 89,200,000
Energy Cost Recovery Rider Rate Per kWh																$ 0.00959
Net change in required FRP rider revenue												$ 39,800,000
Public Utilities, Requested Return on Equity, Percentage															7.65%
Annual revenue constraint per rate class percentage	4.00%
Reduced proposed increase in revenue requirement to comply with annual revenue constraint	$ 72,600,000
System Energy [Member]
Regulatory Assets [Line Items]
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		119,000,000								119,000,000
Refund related to depreciation expense adjustments		19,000,000								19,000,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		75,019,000				59,831,000				75,019,000								$ 59,831,000
Proceeds from the issuance of long-term debt										453,981,000	$ 482,533,000
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		59,000,000								59,000,000
Estimated annual rate reduction		46,000,000								46,000,000
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
Grand Gulf [Member] | System Energy [Member]
Regulatory Assets [Line Items]
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]
Regulatory Assets [Line Items]
Proposed limit on capital improvement project costs before pre-authorization is required				$ 125,000,000
Legacy Entergy Louisiana [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		27,000,000
Legacy Entergy Gulf States Louisiana [Member] | Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount		$ 23,700,000
Distribution Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 26,300,000
Revenue increase resulting from incremental revenue														$ 6,800,000
Transmission Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount								51,000,000
Revenue increase resulting from incremental revenue																			$ 31,600,000
Generation Cost Recovery Rider | Entergy Texas [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount						$ 86,000,000		$ 91,000,000