Income Taxes (Schedule of income taxes paid by jurisdiction) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, Federal, after Refund Received	$ (519,892)
Income Tax Paid, State and Local, after Refund Received	4,821
Income Taxes Paid, Net	(515,071)	$ 41,551	$ 42,821
Proceeds from tax credit sales	547,261	0	0
ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
LOUISIANA
Income Tax Paid, State and Local, after Refund Received	2,726
MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
TEXAS
Income Tax Paid, State and Local, after Refund Received	2,077
State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	18
Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	0
Income Tax Paid, State and Local, after Refund Received	0
Entergy Arkansas [Member]
Income Tax Paid, Federal, after Refund Received	(215,224)
Income Tax Paid, State and Local, after Refund Received	(3,712)
Income Taxes Paid, Net	(244,911)	9,484	2,705
Proceeds from tax credit sales	215,224	0	0
Entergy Arkansas [Member] | ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Arkansas [Member] | LOUISIANA
Income Tax Paid, State and Local, after Refund Received	0
Entergy Arkansas [Member] | MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
Entergy Arkansas [Member] | TEXAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Arkansas [Member] | State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	0
Entergy Arkansas [Member] | Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	(25,975)
Income Tax Paid, State and Local, after Refund Received	(3,712)
Entergy Louisiana [Member]
Income Tax Paid, Federal, after Refund Received	(198,285)
Income Tax Paid, State and Local, after Refund Received	553
Income Taxes Paid, Net	(344,295)	16,882	(141,143)
Proceeds from tax credit sales	198,285	0	0
Entergy Louisiana [Member] | ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Louisiana [Member] | LOUISIANA
Income Tax Paid, State and Local, after Refund Received	0
Entergy Louisiana [Member] | MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
Entergy Louisiana [Member] | TEXAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Louisiana [Member] | State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	0
Entergy Louisiana [Member] | Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	(146,563)
Income Tax Paid, State and Local, after Refund Received	553
Entergy Mississippi [Member]
Income Tax Paid, Federal, after Refund Received	0
Income Tax Paid, State and Local, after Refund Received	0
Income Taxes Paid, Net	82,541	(14,170)	50,869
Entergy Mississippi [Member] | ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Mississippi [Member] | LOUISIANA
Income Tax Paid, State and Local, after Refund Received	0
Entergy Mississippi [Member] | MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
Entergy Mississippi [Member] | TEXAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Mississippi [Member] | State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	0
Entergy Mississippi [Member] | Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	82,541
Income Tax Paid, State and Local, after Refund Received	0
Entergy New Orleans [Member]
Income Tax Paid, Federal, after Refund Received	0
Income Tax Paid, State and Local, after Refund Received	3,021
Income Taxes Paid, Net	10,097	(17,903)	14,120
Entergy New Orleans [Member] | ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy New Orleans [Member] | LOUISIANA
Income Tax Paid, State and Local, after Refund Received	2,550
Entergy New Orleans [Member] | MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
Entergy New Orleans [Member] | TEXAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy New Orleans [Member] | State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	0
Entergy New Orleans [Member] | Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	7,076
Income Tax Paid, State and Local, after Refund Received	471
Entergy Texas [Member]
Income Tax Paid, Federal, after Refund Received	21,000
Income Tax Paid, State and Local, after Refund Received	2,517
Income Taxes Paid, Net	23,517	34,077	28,969
Entergy Texas [Member] | ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
Entergy Texas [Member] | LOUISIANA
Income Tax Paid, State and Local, after Refund Received	0
Entergy Texas [Member] | MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
Entergy Texas [Member] | TEXAS
Income Tax Paid, State and Local, after Refund Received	2,077
Entergy Texas [Member] | State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	0
Entergy Texas [Member] | Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	0
Income Tax Paid, State and Local, after Refund Received	440
System Energy [Member]
Income Tax Paid, Federal, after Refund Received	(133,752)
Income Tax Paid, State and Local, after Refund Received	(3,260)
Income Taxes Paid, Net	(131,297)	624	(19,810)
Proceeds from tax credit sales	133,752	$ 0	$ 0
System Energy [Member] | ARKANSAS
Income Tax Paid, State and Local, after Refund Received	0
System Energy [Member] | LOUISIANA
Income Tax Paid, State and Local, after Refund Received	0
System Energy [Member] | MISSISSIPPI
Income Tax Paid, State and Local, after Refund Received	0
System Energy [Member] | TEXAS
Income Tax Paid, State and Local, after Refund Received	0
System Energy [Member] | State and Local Tax Jurisdiction, Other
Income Tax Paid, State and Local, after Refund Received	0
System Energy [Member] | Entergy Tax Allocation Agreement
Income Tax Paid, Federal, after Refund Received	5,715
Income Tax Paid, State and Local, after Refund Received	$ (3,260)