Summary Of Significant Accounting Policies (Narrative) (Details)		12 Months Ended
	Oct. 31, 2024	Dec. 31, 2024 USD ($) $ / kWh	Dec. 31, 2023 USD ($)	Dec. 31, 2022
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		$ 231,000,000	$ 193,000,000
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		2.90%	2.90%	2.80%
Net cost of utility plant funded by customer advances		$ 0
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Other Current Liabilities [Member]
Customer advances for construction, current		152,000,000
Entergy Louisiana [Member]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		$ 225,400,000	$ 187,200,000
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%	2.60%	2.40%
Customer advances for construction, current		$ 151,662,000	$ 0
Entergy Texas [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		3.80%	4.00%	3.10%
Entergy Arkansas [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		2.70%	2.70%	2.70%
Entergy Mississippi [Member]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		$ 500,000	$ 500,000
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		3.50%	3.60%	3.60%
Entergy New Orleans [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		3.30%	3.30%	3.20%
System Energy [Member]
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service		2.10%	1.60%	2.00%