Risk Management and Fair Values (Narrative) (Details) $ in Thousands	Jun. 30, 2025 USD ($) MMBTU GWh	Dec. 31, 2024 USD ($)
Cash	$ 164,024	$ 48,424
Entergy Arkansas [Member]
Cash	44,574	1,306
Entergy Louisiana [Member]
Cash	1,186	327
Entergy Mississippi [Member]
Cash	30	184
Entergy New Orleans [Member]
Cash	26	374
Entergy Texas [Member]
Cash	25	291
System Energy [Member]
Cash	$ 46	448
Natural Gas Swaps
Derivative, Remaining Maturity	9 months
Total volume outstanding | MMBTU	9,493,000
Natural Gas Swaps | Entergy Louisiana [Member]
Total volume outstanding | MMBTU	0
Natural Gas Swaps | Entergy Mississippi [Member]
Derivative, Remaining Maturity	9 months
Total volume outstanding | MMBTU	9,493,000
Natural Gas Swaps | Entergy New Orleans [Member]
Total volume outstanding | MMBTU	0
Financial transmission rights
Letters of Credit Outstanding, Amount	$ 6,000	2,000
Total volume outstanding | GWh	102,393
Financial transmission rights | Corporate Segment and Other Operating Segment [Member]
Letters of Credit Outstanding, Amount	$ 0
Cash	0
Financial transmission rights | Entergy Arkansas [Member]
Letters of Credit Outstanding, Amount	$ 3,500	500
Total volume outstanding | GWh	20,804
Financial transmission rights | Entergy Louisiana [Member]
Letters of Credit Outstanding, Amount	$ 1,200	100
Total volume outstanding | GWh	55,064
Financial transmission rights | Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	$ 600	800
Total volume outstanding | GWh	11,361
Financial transmission rights | Entergy New Orleans [Member]
Letters of Credit Outstanding, Amount		100
Total volume outstanding | GWh	3,660
Financial transmission rights | Entergy Texas [Member]
Letters of Credit Outstanding, Amount	$ 600	$ 300
Total volume outstanding | GWh	11,505