Rate And Regulatory Matters (Narrative - All Other) (Details)	1 Months Ended														2 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended					24 Months Ended
	Oct. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) MW	Aug. 31, 2025 USD ($)	Jul. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	May 31, 2025 USD ($)	Apr. 30, 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 ($)	Oct. 31, 2025 USD ($)	Sep. 30, 2025 USD ($) MW	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) MW	Sep. 30, 2024 USD ($)	Dec. 31, 2026 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jan. 01, 2025	Dec. 31, 2023 USD ($)	Apr. 30, 2023 USD ($)
Regulatory Liability, Noncurrent		$ 3,834,485,000							$ 3,609,463,000							$ 3,834,485,000			$ 3,609,463,000	$ 3,834,485,000						$ 3,609,463,000
Regulatory Asset, Noncurrent		4,986,139,000							5,255,509,000							4,986,139,000			5,255,509,000	4,986,139,000						5,255,509,000
Asset Impairment Charges																12,795,000	$ 0			12,795,000	$ 131,775,000
Increase (Decrease) in Deferred Fuel Costs																				189,958,000	(208,363,000)
Deferred Fuel Cost		4,375,000							0							4,375,000			0	4,375,000						0
Entergy Arkansas [Member]
Regulatory Liability, Noncurrent		983,576,000							831,165,000							983,576,000			831,165,000	983,576,000						831,165,000
Regulatory Asset, Noncurrent		1,722,817,000							1,700,110,000							1,722,817,000			1,700,110,000	1,722,817,000						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	0			0	131,775,000
Increase (Decrease) in Deferred Fuel Costs																				49,533,000	16,795,000
Deferred Fuel Cost		4,375,000							0							4,375,000			0	4,375,000						0
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		1,634,337,000							1,692,547,000							1,634,337,000			1,692,547,000	1,634,337,000						1,692,547,000
Regulatory Asset, Noncurrent		1,541,114,000							1,637,967,000							1,541,114,000			1,637,967,000	1,541,114,000						1,637,967,000
Increase (Decrease) in Deferred Fuel Costs																				(7,455,000)	(61,893,000)
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
Exception to restoration costs to be recovered - carrying costs					$ 1,800,000
Exception to restoration costs to be recovered - estimated invoices and incentive compensation					10,600,000
Entergy Mississippi [Member]
Regulatory Liability, Noncurrent		69,928,000							59,544,000							69,928,000			59,544,000	69,928,000						59,544,000
Regulatory Asset, Noncurrent		454,170,000							525,847,000							454,170,000			525,847,000	454,170,000						525,847,000
Increase (Decrease) in Deferred Fuel Costs																				103,852,000	(13,938,000)
Entergy New Orleans [Member]
Regulatory Liability, Noncurrent		245,892,000							260,312,000							245,892,000			260,312,000	245,892,000						260,312,000
Regulatory Asset, Noncurrent		108,914,000							133,261,000							108,914,000			133,261,000	108,914,000						133,261,000
Asset Impairment Charges																12,795,000	0			12,795,000	0
Increase (Decrease) in Deferred Fuel Costs																				(4,053,000)	626,000
Entergy Texas [Member]
Regulatory Liability, Noncurrent		17,090,000							18,705,000							17,090,000			18,705,000	17,090,000						18,705,000
Regulatory Asset, Noncurrent		463,505,000							$ 549,708,000							$ 463,505,000			$ 549,708,000	463,505,000						$ 549,708,000
Increase (Decrease) in Deferred Fuel Costs																				48,081,000	$ (149,954,000)
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member]
Energy Cost Recovery Rider Rate Per kWh							$ 0.01333																		$ 0.00882
Energy Cost Recovery Rider [Member] | Entergy Arkansas [Member] | Subsequent Event [Member]
Requested Energy Cost Recovery Rider Rate Per kWh																							$ 0.01333
2024 Formula Rate Plan Filing [Member] | Entergy Louisiana [Member]
Public Utilities, Requested Return on Equity, Percentage						9.70%
Basis points bandwidth above and below midpoint return on common equity						40
Earned return on common equity						9.98%
Public Utilities, Approved Rate Increase (Decrease), Amount						$ 2,000,000
State Effective Income Tax Rate, Percent									7.50%										7.50%							7.50%		5.50%
2024 Formula Rate Plan Filing [Member] | Entergy Louisiana [Member] | Subsequent Event [Member]
Customer credit for ROE above allowed ROE															$ 31,900,000
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] | Hurricane Francine
Public Utilities, Interim Rate Increase (Decrease), Amount								17,800,000
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
Distribution Cost Recovery Factor Rider [Member] | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount		94,700,000					77,800,000
Incremental annual revenues		$ 16,900,000					29,300,000
Transmission Cost Recovery Factor Rider | Entergy Texas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount										$ 9,700,000
Transmission Cost Recovery Factor Rider | Entergy Texas [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 30,300,000
Incremental annual revenues	20,600,000
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
2023 Formula Rate Plan Filing | Entergy Louisiana [Member] | Hurricane Francine
Public Utilities, Interim Rate Increase (Decrease), Amount								$ 17,800,000
2025 Formula Rate Plan Filing | Entergy Arkansas [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 117,700,000
Netting Adjustment																										$ 48,800,000
Annual revenue constraint per rate class percentage				4.00%
Earned return on common equity																										7.71%
2025 Formula Rate Plan Filing | Entergy Arkansas [Member] | Maximum [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount				$ 92,300,000
2025 Formula Rate Plan Filing | Entergy Arkansas [Member] | Subsequent Event [Member]
Projected Revenue Deficiency																						$ 68,900,000
Earned return on common equity																						8.45%
2025 Formula Rate Plan Filing | Entergy Arkansas [Member] | Subsequent Event [Member] | Maximum [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 93,900,000
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			$ 0																		$ 0
Public Utilities, Interim Rate Increase (Decrease), Amount								135,000
Earned return on rate base					7.68%																					7.55%
2025 Formula Rate Plan Filing | Entergy New Orleans [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount							$ 13,800,000
Public Utilities, Approved Return on Equity, Percentage							9.35%
Earned return on equity							10.98%
Public Utilities, Requested Rate Increase (Decrease), Amount, Adjusted							$ 8,600,000
Public Utilities, Approved Rate Increase (Decrease), Amount			$ 19,200,000
Proposed formula rate plan rate mitigation through offsets to regulatory liabilities				4,400,000
Requested reduction to requested rate decrease				7,200,000
Proposed reduction in customer late fees				$ 4,100,000
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
Fuel Reconciliation | Entergy Texas [Member]
Increase (Decrease) in Deferred Fuel Costs																											$ 1,600,000,000
Deferred Fuel Cost																		$ 30,000,000									$ 30,000,000
Interim Facilities Rate Adjustments | Entergy Mississippi [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount																			$ 8,700,000
Interim Facilities Rate Adjustments | Entergy Mississippi [Member] | Subsequent Event [Member]
Public Utilities, Interim Rate Increase (Decrease), Amount																							$ 1,000,000	$ 46,700,000
Deferred COVID-19 costs | Entergy Louisiana [Member]
Low interest debt																														$ 1,600,000,000
Arkansas Cypress Solar | Entergy Arkansas [Member] | Solar photovoltaic array
Generation Capacity | MW		600														600				600
Arkansas Cypress Solar | Entergy Arkansas [Member] | Battery energy storage system
Generation Capacity | MW		350														350				350
2024 look-back filing | Entergy Mississippi [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount								$ 0