Risk Management and Fair Values (Narrative) (Details) $ in Thousands	Mar. 31, 2025 USD ($) GWh MMBTU	Dec. 31, 2024 USD ($)
Cash	$ 69,157	$ 48,424
Entergy Arkansas [Member]
Cash	154	1,306
Entergy Louisiana [Member]
Cash	211	327
Entergy Mississippi [Member]
Cash	141	184
Entergy New Orleans [Member]
Cash	34	374
Entergy Texas [Member]
Cash	120	291
System Energy [Member]
Cash	155	448
Financial Transmission Rights (FTRs) [Member]
Letters of Credit Outstanding, Amount	$ 0	2,000
Total volume outstanding | GWh	24,226
Financial Transmission Rights (FTRs) [Member] | Corporate Segment and Other Operating Segment [Member]
Letters of Credit Outstanding, Amount	$ 0
Cash	0
Financial Transmission Rights (FTRs) [Member] | Entergy Arkansas [Member]
Letters of Credit Outstanding, Amount	$ 0	500
Total volume outstanding | GWh	5,865
Financial Transmission Rights (FTRs) [Member] | Entergy Louisiana [Member]
Letters of Credit Outstanding, Amount	$ 0	100
Total volume outstanding | GWh	10,036
Financial Transmission Rights (FTRs) [Member] | Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	$ 0	800
Total volume outstanding | GWh	3,781
Financial Transmission Rights (FTRs) [Member] | Entergy New Orleans [Member]
Letters of Credit Outstanding, Amount	$ 0	100
Total volume outstanding | GWh	1,001
Financial Transmission Rights (FTRs) [Member] | Entergy Texas [Member]
Letters of Credit Outstanding, Amount	$ 0	$ 300
Total volume outstanding | GWh	3,501
Natural Gas Swaps
Derivative, Remaining Maturity	7 months
Total volume outstanding | MMBTU	12,246,850
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	12,246,850
Natural Gas Swaps | Entergy New Orleans [Member]
Total volume outstanding | MMBTU	0