Rate And Regulatory Matters (Narrative - All Other) (Details)	1 Months Ended									3 Months Ended			6 Months Ended	12 Months Ended
	Apr. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Feb. 28, 2025 USD ($)	Dec. 31, 2024 USD ($)	Oct. 31, 2024 USD ($) MW kV	Aug. 31, 2024	Jul. 31, 2024 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Regulatory Liability, Noncurrent		$ 3,425,277,000		$ 3,609,463,000						$ 3,425,277,000			$ 3,609,463,000			$ 3,425,277,000	$ 3,609,463,000
Regulatory Asset, Noncurrent		5,101,032,000		5,255,509,000						5,101,032,000			5,255,509,000			5,101,032,000	5,255,509,000
Asset Impairment Charges										0		$ 131,775,000
Increase (Decrease) in Deferred Fuel Costs										277,236,000		(92,685,000)
Deferred Fuel Cost		125,490,000		0						125,490,000			0			125,490,000	0
Entergy Arkansas [Member]
Regulatory Liability, Noncurrent		780,511,000		831,165,000						780,511,000			831,165,000			780,511,000	831,165,000
Regulatory Asset, Noncurrent		1,689,961,000		1,700,110,000						1,689,961,000			1,700,110,000			1,689,961,000	1,700,110,000
Payments for Legal Settlements									$ 135,000,000
Refund to customers, plus interest, associated with recalculated bandwidth remedy								$ 13,700,000
Asset Impairment Charges										0		131,775,000
Increase (Decrease) in Deferred Fuel Costs										42,248,000		(18,179,000)
Entergy Arkansas [Member] | Opportunity Sales [Member]
Regulatory Asset, Noncurrent																		$ 131,800,000
Asset Impairment Charges												131,800,000
Asset Impairment Charges, net of tax												99,100,000
Entergy Louisiana [Member]
Regulatory Liability, Noncurrent		1,602,433,000		1,692,547,000						1,602,433,000			1,692,547,000			1,602,433,000	1,692,547,000
Regulatory Asset, Noncurrent		1,572,870,000		1,637,967,000						1,572,870,000			1,637,967,000			1,572,870,000	1,637,967,000
Increase (Decrease) in Deferred Fuel Costs										120,941,000		(6,940,000)
Deferred Fuel Cost		113,571,000		0						113,571,000			0			113,571,000	0
Amount transfer from restricted escrow account as storm damage reserve			$ 33,500,000
Entergy Louisiana [Member] | Hurricane Francine
Total Restoration Costs For Repair and Replacement of Electrical System				183,600,000
Carrying costs associated with storm restoration costs				3,600,000
Entergy Mississippi [Member]
Regulatory Liability, Noncurrent		73,151,000		59,544,000						73,151,000			59,544,000			73,151,000	59,544,000
Regulatory Asset, Noncurrent		487,430,000		525,847,000						487,430,000			525,847,000			487,430,000	525,847,000
Increase (Decrease) in Deferred Fuel Costs										46,363,000		(28,337,000)
Entergy New Orleans [Member]
Regulatory Liability, Noncurrent		248,372,000		260,312,000						248,372,000			260,312,000			248,372,000	260,312,000
Regulatory Asset, Noncurrent		127,473,000		133,261,000						127,473,000			133,261,000			127,473,000	133,261,000
Increase (Decrease) in Deferred Fuel Costs										10,659,000		(369,000)
Deferred Fuel Cost		11,918,000		0						11,918,000			0			11,918,000	0
Entergy Texas [Member]
Regulatory Liability, Noncurrent		18,248,000		18,705,000						18,248,000			18,705,000			18,248,000	18,705,000
Regulatory Asset, Noncurrent		$ 521,801,000		549,708,000						521,801,000			549,708,000			521,801,000	549,708,000
Increase (Decrease) in Deferred Fuel Costs										$ 57,024,000		$ (38,863,000)
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member]
Energy Cost Recovery Rider Rate Per kWh																0.00882
Requested Energy Cost Recovery Rider Rate Per kWh																$ 0.01333
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member] | Subsequent Event [Member]
Energy Cost Recovery Rider Rate Per kWh	$ 0.01333
2024 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount													$ 8,700,000
2024 Formula Rate Plan Filing [Member] | Entergy Mississippi [Member] | Subsequent Event [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount														$ 1,000,000	$ 46,700,000
Grand Gulf Credit Rider [Member] | Entergy Arkansas [Member]
Refund to retail customers							$ 100,600,000				$ 92,300,000
2023 Entergy Louisiana Rate Case and Formula Rate Plan Extension Request | Entergy Louisiana [Member] | System Energy Settlement with the LPSC
Public Utilities, Interim Rate Increase (Decrease), Amount				$ 25,100,000
2023 Entergy Louisiana Rate Case and Formula Rate Plan Extension Request | Entergy Louisiana [Member] | Hurricane Francine
Public Utilities, Interim Rate Increase (Decrease), Amount			$ 17,800,000
Distribution Cost Recovery Factor Rider [Member] | Entergy Texas [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	77,800,000
Incremental annual revenues	$ 29,300,000
Transmission Cost Recovery Factor Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 9,700,000
2023 Formula Rate Plan Filing | Entergy Louisiana [Member]
Public Utilities, Requested Return on Equity, Percentage						9.70%
Basis points bandwidth above and below midpoint return on common equity						40
2025 Formula Rate Plan Filing | Entergy Mississippi [Member]
Public Utilities, Requested Return on Equity, Percentage		7.64%
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 0
Public Utilities, Interim Rate Increase (Decrease), Amount		$ 135,000
2025 Formula Rate Plan Filing | Entergy New Orleans [Member] | Subsequent Event [Member]
Public Utilities, Approved Return on Equity, Percentage	9.35%
2025 Formula Rate Plan Filing | Entergy New Orleans [Member] | Subsequent Event [Member] | Natural Gas, US Regulated [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 0
Earned return on equity	8.96%
Public Utilities, Requested Rate Increase (Decrease), Amount, Adjusted	$ 500,000
2025 Formula Rate Plan Filing | Entergy New Orleans [Member] | Subsequent Event [Member] | Electricity, US Regulated [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 13,800,000
Earned return on equity	10.98%
Public Utilities, Requested Rate Increase (Decrease), Amount, Adjusted	$ 8,600,000
Additional generation and transmission resources | Entergy Louisiana [Member]
Measurement of electrical voltage for new transmission line | kV					500
Measurement of electrical voltage for substation upgrades | kV					500
Additional generation and transmission resources | Entergy Louisiana [Member] | Future additions contributed by customer
Generation Capacity | MW					1,500
Additional generation and transmission resources | Entergy Louisiana [Member] | Three new combined cycle combustion turbine generation resources
Generation Capacity | MW					2,262
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Entergy Mississippi [Member]
Allocated sale-leaseback annual renewal costs																	$ 5,700,000