Commitments And Contingencies (Narrative) (Details)		1 Months Ended									12 Months Ended										96 Months Ended	120 Months Ended	180 Months Ended
	Jan. 01, 2018	Oct. 31, 2021 USD ($)	Aug. 31, 2021 USD ($)	Jan. 31, 2021 USD ($)	Oct. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)	Feb. 28, 2014 USD ($)	Nov. 30, 2013 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) program reactor claim plaintiff	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2031 USD ($)	Oct. 01, 2012 USD ($)	Dec. 31, 2026 USD ($)
Commitments And Contingencies [Line Items]
Proceeds from insurance												$ 9,829,000	$ 0	$ 0
Number of financial protection programs | program												2
Insurance coverage for public liability by American Nuclear Insurers												$ 450,000,000
Maximum retrospective insurance premium obligation per reactor per incident												137,600,000
Maximum retrospective insurance premium obligation per incident												688,000,000
Rate of maximum retrospective premium per year per nuclear power reactor												21,000,000
ANI combined with Secondary Financial Protection Coverage												$ 13,700,000,000
Number of nuclear reactor included in the Secondary Financial Protection program | reactor												96
Total premium for reactor under secondary financial protection program												$ 13,000,000,000
Maximum recovery nuclear insurance policies for property damage caused by Terrorist Act												3,240,000,000
Maximum conventional property insurance coverage on an each and every loss basis												400,000,000
Minimum value of power plants, substations to be covered under conventional property insurance												5,000,000
Purchase of terrorism insurance coverage												$ 400,000,000
Reduction in fee Entergy’s nuclear owner/licensee subsidiaries have been charged related to spent nuclear fuel storage										$ 0
Percentage of Weekly Indemnity Paid After Deductible Second Period has Passed												80.00%
Percentage of Weekly Indemnity Paid After Deductible Final Period has Passed												80.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%														35.00%	35.00%
Increase (Decrease) in Regulatory Liabilities												$ (266,559,000)	43,631,000	238,669,000
Percentage of Weekly Indemnity Paid After Deductible First Period has Passed												100.00%
Operational Perils [Member]
Commitments And Contingencies [Line Items]
Self-insured retention per occurrence												$ 20,000,000
Earthquake and Flood [Member]
Commitments And Contingencies [Line Items]
Maximum conventional property insurance coverage on an each and every loss basis												400,000,000
Self-insured retention per occurrence												40,000,000
Named Windstorm and Associated Storm Surge [Member]
Commitments And Contingencies [Line Items]
Maximum conventional property insurance coverage on an each and every loss basis												125,000,000
Self-insured retention per occurrence												40,000,000
ANO and Grand Gulf [Member] | Flood
Commitments And Contingencies [Line Items]
Primary Insurance Layer Conditions Of Coverage												$ 500,000,000
Grand Gulf [Member]
Commitments And Contingencies [Line Items]
Ownership percentage by a non-affiliated company												10.00%
Utility [Member] | Property Insurance
Commitments And Contingencies [Line Items]
Property Insurance insured amount per occurrence												$ 1,060,000,000.00
Utility [Member] | Earthquake
Commitments And Contingencies [Line Items]
Primary Insurance Layer Conditions Of Coverage												$ 500,000,000
Utility [Member] | Asbestos Issue [Member]
Commitments And Contingencies [Line Items]
Number of asbestos lawsuits | claim												190
Number of claimants in asbestos lawsuits | plaintiff												320
Utility [Member] | Nuclear [Member]
Commitments And Contingencies [Line Items]
Property Insurance Deductible												$ 20,000,000
Utility [Member] | Nuclear [Member] | Wind [Member]
Commitments And Contingencies [Line Items]
Property Insurance Deductible												$ 10,000,000
Percentage of Additional Property Insurance Deductible for Loss in Excess of Deductible												10.00%
Utility [Member] | River Bend and Waterford 3 [Member] | Flood
Commitments And Contingencies [Line Items]
Property Insurance Deductible												$ 10,000,000
Percentage of Additional Property Insurance Deductible for Loss in Excess of Deductible												10.00%
Utility [Member] | Maximum [Member] | Nuclear [Member] | Wind [Member]
Commitments And Contingencies [Line Items]
Property Insurance Deductible												$ 50,000,000
Utility [Member] | Maximum [Member] | River Bend and Waterford 3 [Member] | Flood
Commitments And Contingencies [Line Items]
Property Insurance Deductible												$ 50,000,000
Entergy Mississippi [Member]
Commitments And Contingencies [Line Items]
Percentage of capacity and energy agreed to sell by system energy from grand gulf												33.00%
Average monthly payments under unit power sales agreement												$ 17,700,000
Purchased Percentage Of Capacity And Energy Based On Agreement												31.30%
Amortization period of cost												27 years
Allocated amortization cost in percentage												43.97%
Increase (Decrease) in Regulatory Liabilities												$ 20,165,000	21,930,000	(18,672,000)
Entergy Texas [Member]
Commitments And Contingencies [Line Items]
Increase (Decrease) in Regulatory Liabilities												$ (30,499,000)	(28,747,000)	(57,477,000)
System Energy [Member]
Commitments And Contingencies [Line Items]
Number of nuclear power reactors | reactor												1
Increase (Decrease) in Regulatory Liabilities												$ 21,252,000	40,884,000	140,965,000
Ownership												90.00%
System Energy [Member] | Grand Gulf [Member]
Commitments And Contingencies [Line Items]
Damages awarded for previously capitalized costs					$ 5,000,000
Damages awarded for previously recorded operation and maintenance					10,000,000
Damages awarded for previously recorded nuclear fuel expense					21,000,000
Litigation Settlement, Amount Awarded from Other Party					$ 40,500,000
Entergy New Orleans [Member]
Commitments And Contingencies [Line Items]
Maximum conventional property insurance coverage on an each and every loss basis												$ 50,000,000
Percentage of capacity and energy agreed to sell by system energy from grand gulf												17.00%
Average monthly payments under unit power sales agreement												$ 9,500,000
Purchased Percentage Of Capacity And Energy Based On Agreement												24.70%
Amortization period of cost												27 years
Allocated amortization cost in percentage												29.80%
Increase (Decrease) in Regulatory Liabilities												$ (8,639,000)	4,985,000	(4,728,000)
Entergy Louisiana [Member]
Commitments And Contingencies [Line Items]
Payments made under purchased power agreement												$ 117,200,000	128,500,000	132,700,000
Required energy for the production of Vidalia project in percentage												94.00%
Credit rates agreed by subsidiary for each year under settlement related to tax benefits from tax treatment of purchased power agreement																						$ 11,000,000
Number of years for which credit rates agreed by subsidiary under settlement related to tax benefits from the tax treatment of purchased power agreement																						10 years
Proceeds from insurance												$ 5,695,000	0	$ 0
Number of nuclear power reactors | reactor												2
Percentage of capacity and energy agreed to sell by system energy from grand gulf												14.00%
Average monthly payments under unit power sales agreement												$ 7,800,000
Purchased Percentage Of Capacity And Energy Based On Agreement												26.90%
Amortization period of cost												27 years
Allocated amortization cost in percentage												26.23%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent														21.00%
Increase (Decrease) in Regulatory Liabilities												$ (4,783,000)	$ (16,478,000)	$ 71,698,000
Entergy Louisiana [Member] | State of Louisiana Enacted Tax Legislation 2021
Commitments And Contingencies [Line Items]
State Effective Income Tax Rate, Percent												7.50%	8.00%
Entergy Louisiana [Member] | Waterford 3 [Member]
Commitments And Contingencies [Line Items]
Damages awarded for previously capitalized costs						$ 5,000,000
Damages awarded for previously recorded operation and maintenance						8,000,000
Damages awarded for previously recorded nuclear fuel expense						20,000,000
Litigation Settlement, Amount Awarded from Other Party						$ 33,000,000
Entergy Louisiana [Member] | River Bend [Member]
Commitments And Contingencies [Line Items]
Damages awarded for previously capitalized costs			$ 9,000,000
Damages awarded for previously recorded operation and maintenance			4,000,000
Damages awarded for previously recorded nuclear fuel expense			8,000,000
Litigation Settlement, Amount Awarded from Other Party			21,000,000
Entergy Louisiana [Member] | Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Estimated Payments Under Purchased Power Agreement in Next Twelve Months											$ 136,900,000
Estimated Payments Under Purchased Power Agreement in Year Two and Thereafter																					$ 1,100,000,000
Credit rates agreed by subsidiary for each year under settlement related to tax benefits from tax treatment of purchased power agreement																							$ 20,235,000
Number of years for which credit rates agreed by subsidiary under settlement related to tax benefits from the tax treatment of purchased power agreement																							15 years
Entergy Arkansas [Member]
Commitments And Contingencies [Line Items]
Estimated cost to restore ANO to service																				$ 95,000,000
Proceeds From Insurance Settlement, Operating and Investing Activities																			$ 50,000,000
Number of nuclear power reactors | reactor												2
Percentage of capacity and energy agreed to sell by system energy from grand gulf												36.00%
Average monthly payments under unit power sales agreement												$ 19,800,000
Purchased Percentage Of Capacity And Energy Based On Agreement												17.10%
Amortization period of cost												27 years
Incremental NRC Inspection Costs																		$ 53,000,000
NRC inspection and performance improvement costs																$ 7,000,000	$ 44,000,000
Litigation Settlement, Amount Awarded from Other Party															$ 21,000,000
Increase (Decrease) in Regulatory Liabilities												$ (264,054,000)	$ 21,066,000	$ 106,878,000
State Effective Income Tax Rate, Percent												5.90%	6.20%	6.50%
Entergy Arkansas [Member] | ANO [Member]
Commitments And Contingencies [Line Items]
Deferred Fuel and Purchased Energy Costs Excluded From Revised Energy Cost Rate									$ 65,900,000
Litigation Settlement, Amount Awarded from Other Party							$ 80,000,000
Entergy Arkansas [Member] | Subsequent Event [Member]
Commitments And Contingencies [Line Items]
State Effective Income Tax Rate, Percent											5.30%
Entergy Wholesale Commodities [Member] | FitzPatrick [Member]
Commitments And Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party							$ 7,000,000
Entergy Wholesale Commodities [Member] | Palisades [Member]
Commitments And Contingencies [Line Items]
Damages awarded for previously capitalized costs				$ 16,000,000
Damages awarded for previously recorded operation and maintenance				7,000,000
Reduction of previously recorded deprecation expense				9,000,000
Litigation Settlement, Amount Awarded from Other Party				$ 23,000,000
Entergy Wholesale Commodities [Member] | Indian Point [Member]
Commitments And Contingencies [Line Items]
Damages awarded for previously capitalized costs		$ 32,000,000
Damages awarded for previously recorded operation and maintenance		47,000,000
Damages awarded for previously recorded taxes other than income taxes		4,000,000
Litigation Settlement, Amount Awarded from Other Party		$ 83,000,000
Entergy Wholesale Commodities [Member] | Pilgrim [Member]
Commitments And Contingencies [Line Items]
Litigation Settlement, Amount Awarded from Other Party			$ 37,600,000
Vidalia Purchased Power Agreement [Member]
Commitments And Contingencies [Line Items]
Increase (Decrease) in Regulatory Liabilities								$ (30,500,000)