Summary Of Significant Accounting Policies (Narrative) (Details)		1 Months Ended	12 Months Ended
	Oct. 31, 2024	Jul. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) $ / kWh	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jul. 01, 2025 USD ($)
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment			$ 251,000,000	$ 231,000,000
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			2.90%	2.90%	2.90%
Net cost of utility plant funded by customer advances			$ 0
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Customer advances for construction, current			632,850,000	$ 151,662,000
Asset Impairment Charges			12,795,000	107,134,000	$ 42,679,000
Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Entergy New Orleans and Entergy Louisiana natural gas distribution businesses [Member]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ 19,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, net of tax		12,000,000
Disposal Group, Not Discontinued Operations, Transaction Costs						$ 32,000,000
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent				6,474,000		7,000,000
Disposal Group, Liabilities, Regulatory Liability, Noncurrent			1,600,000	1,611,000
Entergy Louisiana [Member]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment			$ 240,800,000	$ 225,400,000
Percentage Interest in River Bend			30.00%
Percentage portion of River Bend plant costs, generation, revenues, and expenses operated under the Louisiana retail deregulated portion of River Bend			15.00%
Rate At Which Electricity Sold To Retail Customers | $ / kWh			4.6
Limit Above Which Incremental Revenue Shared Between Customers and Shareholders | $ / kWh			4.6
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			2.70%	2.70%	2.60%
Customer advances for construction, current			$ 543,312,000	$ 151,662,000
Entergy Louisiana [Member] | Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Entergy Louisiana natural gas distribution business [Member]
Disposal Group, Including Discontinued Operation, Consideration						200,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		19,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, net of tax		14,000,000
Disposal Group, Not Discontinued Operations, Transaction Costs						15,000,000
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent				0
Disposal Group, Liabilities, Regulatory Liability, Noncurrent			$ 1,200,000	$ 1,214,000
Entergy Texas [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			3.60%	3.80%	4.00%
Entergy Arkansas [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			2.80%	2.70%	2.70%
Asset Impairment Charges			$ 0	$ 131,775,000	$ 78,434,000
Entergy Mississippi [Member]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment			$ 600,000	$ 500,000
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			3.40%	3.50%	3.60%
Customer advances for construction, current			$ 89,538,000	$ 0
Entergy New Orleans [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			3.30%	3.30%	3.30%
Asset Impairment Charges			$ 12,795,000	$ 0	$ 0
Entergy New Orleans [Member] | Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Entergy New Orleans natural gas distribution business [Member]
Disposal Group, Including Discontinued Operation, Consideration						284,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		7,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, net of tax		5,000,000
Disposal Group, Not Discontinued Operations, Transaction Costs						17,000,000
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent				0
Disposal Group, Liabilities, Regulatory Liability, Noncurrent			$ 400,000	$ 397,000		$ 4,000,000
Asset Impairment Charges		$ 13,000,000
System Energy [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service			2.10%	2.10%	1.60%