Rate And Regulatory Matters (Narrative - All Other) (Details)	1 Months Ended					3 Months Ended		6 Months Ended				12 Months Ended
	Apr. 30, 2026 USD ($)	Mar. 31, 2026 USD ($)	Feb. 28, 2026 USD ($)	Jan. 31, 2026 USD ($)	Oct. 31, 2025 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Feb. 28, 2027 USD ($)	Aug. 31, 2026 USD ($)	Feb. 28, 2026 USD ($)	Aug. 31, 2025 USD ($)	Mar. 31, 2027 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) MW	Apr. 30, 2024 USD ($)	Dec. 31, 2022 USD ($)
Regulatory Liability, Noncurrent		$ 3,559,742,000				$ 3,559,742,000							$ 3,559,742,000	$ 3,911,839,000
Regulatory Asset, Noncurrent		4,890,744,000				4,890,744,000							4,890,744,000	5,005,976,000
Asset Impairment Charges						18,059,000	$ 0
Increase (Decrease) in Deferred Fuel Costs						308,610,000	277,236,000
Deferred Fuel Cost		348,181,000				348,181,000							348,181,000	54,133,000
Entergy Arkansas [Member]
Regulatory Liability, Noncurrent		899,389,000				899,389,000							899,389,000	1,044,060,000
Regulatory Asset, Noncurrent		1,647,162,000				1,647,162,000							1,647,162,000	1,743,848,000
Increase (Decrease) in Deferred Fuel Costs						82,715,000	42,248,000
Deferred Fuel Cost		110,419,000				110,419,000							110,419,000	27,704,000
Entergy Louisiana [Member]
Regulatory Liability, Noncurrent		1,523,530,000				1,523,530,000							1,523,530,000	1,630,763,000
Regulatory Asset, Noncurrent		1,596,354,000				1,596,354,000							1,596,354,000	1,540,709,000
Increase (Decrease) in Deferred Fuel Costs						131,148,000	120,941,000
Deferred Fuel Cost		146,820,000				146,820,000							146,820,000	15,672,000
Entergy Louisiana [Member] | Winter Storm Fern
Increase (Decrease) in Deferred Fuel Costs				$ 141,900,000
Entergy Mississippi [Member]
Regulatory Liability, Noncurrent		151,993,000				151,993,000							151,993,000	144,124,000
Regulatory Asset, Noncurrent		464,191,000				464,191,000							464,191,000	455,714,000
Increase (Decrease) in Deferred Fuel Costs						49,848,000	46,363,000
Deferred Fuel Cost		60,605,000				60,605,000							60,605,000	10,757,000
Entergy New Orleans [Member]
Regulatory Liability, Noncurrent		308,068,000				308,068,000							308,068,000	312,962,000
Regulatory Asset, Noncurrent		108,629,000				108,629,000							108,629,000	109,690,000
Increase (Decrease) in Deferred Fuel Costs						12,647,000	10,659,000
Deferred Fuel Cost		9,438,000				9,438,000							9,438,000	0
Entergy Texas [Member]
Regulatory Liability, Noncurrent		155,907,000				155,907,000							155,907,000	138,969,000
Regulatory Asset, Noncurrent		495,836,000				495,836,000							495,836,000	510,806,000
Increase (Decrease) in Deferred Fuel Costs						32,253,000	$ 57,024,000
Deferred Fuel Cost		20,900,000				20,900,000							20,900,000	$ 0
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member]
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	$ 0.01508
Requested Energy Cost Recovery Rider Rate Per kWh												$ 0.01508
Distribution Cost Recovery Factor Rider [Member] | Entergy Texas [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	112,500,000
Incremental annual revenues	$ 20,400,000
Transmission Cost Recovery Factor Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 30,300,000
Incremental annual revenues					$ 20,600,000
Arkansas Cypress Solar | Entergy Arkansas [Member] | Solar photovoltaic array
Generation Capacity | MW															600
Arkansas Cypress Solar | Entergy Arkansas [Member] | Battery energy storage system
Generation Capacity | MW															350
Arkansas Cypress Solar | Entergy Arkansas [Member] | Arkansas Cypress Solar
Public Utilities, Property, Plant and Equipment, Generation or Processing															$ 1,602,000,000
2026 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			293,000
2026 Formula Rate Plan Filing | Entergy New Orleans [Member] | Subsequent Event [Member]
Public Utilities, Requested Return on Equity, Percentage	7.55%
Public Utilities, Approved Return on Equity, Percentage	9.35%
Public Utilities, Interim Rate Increase (Decrease), Amount	$ 16,600,000
2025 look-back filing | Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 0
Generation Cost Recovery Factor Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount		150,400,000
2026 Rate Case | Entergy Arkansas [Member]
Public Utilities, Requested Return on Equity, Percentage			9.90%
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 44,600,000
Generating Arkansas Jobs Act Rider | Entergy Arkansas [Member]
Requested recovery		$ 110,400,000				$ 110,400,000							$ 110,400,000
Resilience Plan Cost Recovery Rider | Entergy Louisiana [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount										$ 50,200,000	$ 40,400,000
Incremental annual revenues										$ 9,800,000	$ 38,900,000
Phase One Investment in Resilience Plan																	$ 5,000,000,000
Phase One Investment in Resilience Plan																$ 1,900,000,000
Resilience Plan Cost Recovery Rider | Entergy Louisiana [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount									$ 101,800,000
Incremental annual revenues									51,600,000
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount								$ 16,600,000	$ 5,600,000