Risk Management and Fair Values (Narrative) (Details) $ in Thousands	Mar. 31, 2026 USD ($) GWh MMBTU	Dec. 31, 2025 USD ($)
Cash	$ 68,145	$ 45,895
Entergy Arkansas [Member]
Cash	14,056	7,048
Entergy Louisiana [Member]
Cash	295	237
Entergy Mississippi [Member]
Cash	34	27
Entergy New Orleans [Member]
Cash	29	26
Entergy Texas [Member]
Cash	$ 201	200
Natural Gas Swaps
Derivative, Remaining Maturity	7 months
Total volume outstanding | MMBTU	12,505,900
Natural Gas Swaps | Entergy Louisiana [Member]
Total volume outstanding | MMBTU	0
Natural Gas Swaps | Entergy Mississippi [Member]
Derivative, Remaining Maturity	7 months
Total volume outstanding | MMBTU	12,505,900
Financial transmission rights
Letters of Credit Outstanding, Amount	$ 1,000	2,000
Total volume outstanding | GWh	18,455
Financial transmission rights | Corporate Segment and Other Operating Segment [Member]
Letters of Credit Outstanding, Amount	$ 0	0
Cash	0	0
Financial transmission rights | Entergy Arkansas [Member]
Letters of Credit Outstanding, Amount	900	100
Cash	$ 0	0
Total volume outstanding | GWh	3,947
Financial transmission rights | Entergy Louisiana [Member]
Letters of Credit Outstanding, Amount		800
Cash	$ 0	0
Total volume outstanding | GWh	9,828
Financial transmission rights | Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	$ 200	800
Cash	$ 0	0
Total volume outstanding | GWh	1,981
Financial transmission rights | Entergy New Orleans [Member]
Cash	$ 0	0
Total volume outstanding | GWh	661
Financial transmission rights | Entergy Texas [Member]
Letters of Credit Outstanding, Amount		100
Cash	$ 0	$ 0
Total volume outstanding | GWh	2,038
Interest Rate Swap
Derivative, Notional Amount	$ 1,100,000
Interest Rate Swap | Entergy Texas [Member]
Derivative, Notional Amount	$ 1,100,000