Rate And Regulatory Matters (Narrative) (Details) - USD ($)	1 Months Ended							3 Months Ended		8 Months Ended			12 Months Ended			14 Months Ended	24 Months Ended		36 Months Ended
	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 31, 2020	May 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021	Feb. 28, 2021	Aug. 31, 2020	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020	Aug. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Jun. 30, 2020	Apr. 30, 2020
Regulatory Assets [Line Items]
Impairment of Long-Lived Assets Held-for-use								$ 3,278,000	$ 4,962,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 1,311,997,000		$ 2,012,030,000				1,311,997,000						$ 1,311,997,000	$ 2,012,030,000
Proceeds from the issuance of long-term debt								3,676,242,000	3,195,345,000
Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 109,500,000								63,000,000
Regulatory asset related to costs associated with COVID-19 pandemic		47,800,000						47,800,000						47,800,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		526,575,000		667,281,000				526,575,000						526,575,000	667,281,000
Proceeds from the issuance of long-term debt								1,399,245,000	1,221,900,000
Amount transfer from restricted escrow account as storm damage reserve					$ 257,000,000
Estimated remaining costs for completion of J. Wayne Leonard Power Station								3,100,000
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%
Storm Reserve Escrow Account	$ 290,000,000
Entergy Louisiana [Member] | Subsequent Event [Member] | Hurricanes Laura, Delta, Zeta, and Winter Storm Uri [Domain]
Regulatory Assets [Line Items]
Total Restoration Costs For Repair and Replacement of Electrical System	2,050,000,000.00
Non-capital storm costs	310,000,000
Deferred Storm and Property Reserve Deficiency, Noncurrent	1,740,000,000
Total Restoration Costs For Repair and Replacement of Electrical System including carrying costs	2,100,000,000
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		16,300,000						16,300,000						16,300,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 192,649,000		134,854,000				192,649,000						192,649,000	134,854,000
Proceeds from the issuance of long-term debt								200,573,000	0
Public Utilities, Requested Return on Equity, Percentage		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
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
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		$ 14,800,000						14,800,000						14,800,000
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		26,927,000		12,460,000				26,927,000						26,927,000	12,460,000
Credits to customer bills resulting from City Council Cares Program		4,300,000						4,300,000						4,300,000
Proceeds from the issuance of long-term debt								0	139,116,000
Storm Reserve Escrow Account		38,841,000		83,038,000				38,841,000						38,841,000	83,038,000
Withdrawal from storm reserves		44,000,000
Entergy New Orleans [Member] | Maximum [Member]
Regulatory Assets [Line Items]
public utilities proposed customer credits											$ 400
Entergy New Orleans [Member] | Subsequent Event [Member] | 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 Texas [Member]
Regulatory Assets [Line Items]
Regulatory asset related to costs associated with COVID-19 pandemic		10,700,000						10,700,000						10,700,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		178,917,000		879,908,000				178,917,000						178,917,000	879,908,000
Proceeds from the issuance of long-term debt								0	194,631,000
Entergy Texas [Member] | Hurricane Laura [Member]
Regulatory Assets [Line Items]
Interim fuel refund for cumulative over-recovery			$ 75,000,000
Entergy Texas [Member] | Subsequent Event [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 Arkansas [Member]
Regulatory Assets [Line Items]
Energy Cost Recovery Rider Rate Per kWh														0.01052
Regulatory asset related to costs associated with COVID-19 pandemic		11,400,000						11,400,000						11,400,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 288,269,000		234,213,000				288,269,000						288,269,000	234,213,000
Proceeds from the issuance of long-term debt								604,760,000	264,505,000
Provision for rate refund				43,500,000											43,500,000
Public Utilities, Requested Return on Equity, Percentage		9.75%
Entergy Arkansas [Member] | Subsequent Event [Member]
Regulatory Assets [Line Items]
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	9.65%
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						422,000,000
Interest Portion of rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback		115,000,000						115,000,000						115,000,000
Refund related to depreciation expense adjustments		19,000,000						19,000,000						19,000,000
Public Utilities, Property, Plant and Equipment, Construction Work in Progress		$ 73,360,000		59,831,000				73,360,000						73,360,000	$ 59,831,000
Proceeds from the issuance of long-term debt								189,244,000	$ 243,559,000
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						59,000,000
Estimated annual rate reduction		46,000,000						46,000,000						46,000,000
Provision related to FERC proceeding		36,000,000						$ 36,000,000						$ 36,000,000
One-time accumulated deferred income tax credit				25,200,000
Refund related to replacement energy costs		360,000,000
Pre-authorization of capital improvement projects		$ 125,000,000
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%
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