Rate and Regulatory Matters (Complaints Against System Energy - Narrative) (Details) - USD ($) $ in Thousands		1 Months Ended																											3 Months Ended	12 Months Ended			57 Months Ended	213 Months Ended
	Nov. 01, 2023	Oct. 31, 2024	Sep. 30, 2024	Jul. 31, 2024	Jun. 30, 2024	Apr. 30, 2024	Oct. 31, 2023	May 31, 2023	Mar. 31, 2023	Jan. 31, 2023	Dec. 31, 2022	Nov. 30, 2022	Jul. 31, 2022	Jun. 30, 2022	May 31, 2022	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Aug. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Jan. 31, 2017	Jan. 31, 2014	Dec. 31, 1988	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2020	Sep. 30, 2021	Feb. 01, 2023	Nov. 30, 2021	Apr. 30, 2020	Oct. 31, 2019
Income Tax Expense (Benefit)			$ 9,000																											$ 381,027	$ (690,535)	$ (38,978)
Increase (Decrease) in Other Regulatory Assets																														(378,514)	(435,877)	(576,859)
Accounts Payable, Current																														1,929,162	1,566,745
Regulatory Liability, Noncurrent																														3,609,463	3,116,926
Increase (Decrease) in Regulatory Liabilities																														660,559	463,805	(266,559)
Complaints against System Energy [Member]
Regulatory Liability, Noncurrent																														$ 0	177,900
System Energy [Member]
Percent Interest in Grand Gulf																														90.00%
Earned return on equity																		10.94%								10.94%
Public Utilities, Approved Return on Equity, Percentage		9.65%
Recommended adjustment to earned return on equity																		9.32%
First refund period requested authorized rate of return - LPSC																					7.97%
First refund period requested authorized rate of return - MPSC and APSC																					9.24%
First refund period requested authorized rate of return - FERC																					9.49%
Second refund period requested authorized rate of return - LPSC																					7.78%
Second refund period requested authorized rate of return - MPSC and APSC																					9.15%
Second refund period requested authorized rate of return - FERC																					9.09%
First refund period requested authorized rate of return																					10.12%
Second refund period requested authorized rate of return																					9.44%
Annual renewal lease payments on Grand Gulf Sale-Leaseback																								$ 17,200
LPSC requested rate reduction for ADIT associated with uncertain tax positions resulting from Grand Gulf sale-leaseback																																						$ 512,000
Remaining NBV of Leased Assets																																					$ 70,000
Refund of Lease Payments																																					$ 17,200
Future nuclear decommissioning costs allowed by the IRS in cost of goods sold																				$ 102,000
Percent of requested deduction allowed by IRS of uncertain decommissioning tax postion																				10.00%													10.00%
One-time accumulated deferred income tax credit																			$ 25,200														$ 25,200
Income Tax Expense (Benefit)																														$ 29,503	32,032	(92,828)
Increase (Decrease) in Other Regulatory Assets																														(19,866)	31,239	19,575
Accumulated deferred income tax credits to customers																			$ 3,400
Incremental Fuel and Replacement Energy Costs																		$ 360,000
Pre-authorization amount for capital improvement projects																		$ 125,000
Regulatory Liability, Noncurrent																														747,190	782,912
First refund period requested authorized rate of return, primary recommendation - LPSC																					7.56%
Secomd refund period requested authorized rate of return, primary recommendation - LPSC																					7.18%
Increase (Decrease) in Regulatory Liabilities																														(37,713)	11,009	21,252
System Energy [Member] | Complaints against System Energy [Member]
Regulatory Liability, Noncurrent																														0	177,900
System Energy [Member] | Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member]
Disallowance of future sale-leaseback renewal costs recovery											$ 11,500
Reduction to accumulated deferred income tax asset											94,000
Reduction to accumulated deferred income tax regulatory liability											25,000
Income Tax Expense (Benefit)											13,000
Reduction to depreciation expense and related accumulated depreciation											33,000																					33,000
Calculated refund of sale-leaseback renewal rental costs, including interest										$ 89,800
Calculated net refund for excess depreciation expense										13,700
Payments for Legal Settlements										103,500
Calculation of additional refunds resulting form decommissioning tax position issue, presented in compliance report																																			$ 493,000
Recalculated Payments for Legal Settlements							$ 35,700
Recalculated proceeds from legal settlement							67,800
Increase (Decrease) in Other Regulatory Assets																													$ 40,000
System Energy [Member] | Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Entergy Arkansas [Member]
Recalculated proceeds from legal settlement							27,300
System Energy [Member] | Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Unit Power Sales Agreement Complaint [Member]
Sale-leaseback regulatory liability reduction											$ 56,000
System Energy [Member] | Unit Power Sales Agreement Complaint [Member]
Payments for Legal Settlements										103,500
New Orleans City Council Witness Recommended Refund																																		$ 98,800
New Orleans City Council Recommended Hypothetical Equity Ratio Prospectively																																				48.15%
FERC Staff Recommended Refund																$ 106,600	$ 84,100
LPSC estimated refund without interest															$ 286,000
New Orleans City Council proposed refunds related to the money pool															51,700
Reduction in the revenue requirement - money pool included in short-term debt															1,500
Reduction in revenue requirement - money pool credited through UPSA															1,900
Reduction in revenue requirement for every $50M in refunds															1,900
Amount of refunds ordered in a given year															50,000
Collective refunds and interest sought by public utilities															700,000
Potential settlement refund												$ 18,000
FERC ALJ initial decision modification to cash working capital allowance								$ 36,400
System Energy [Member] | System Energy Settlement with the APSC [Member]
Regulatory liability related to settlements and potential future refunds														$ 588,000
System Energy [Member] | System Energy Settlement with the APSC [Member] | Entergy Arkansas [Member]
Public Utilities, Approved Return on Equity, Percentage	9.65%
Public Utilities, Approved Equity Capital Structure, Percentage	52.00%
Payments for Legal Settlements																														93,000
Black box refund							142,000
System Energy [Member] | System Energy Settlement with the City Council [Member]
Regulatory liabilitity related to settlements and potential future refunds														588,000
System Energy [Member] | System Energy Settlement with the City Council [Member] | Entergy New Orleans [Member]
Payments for Legal Settlements		$ 98,000
Black box refund						$ 116,000
System Energy [Member] | System Energy Settlement with the LPSC [Member]
Regulatory liability related to settlements and potential future refunds														588,000
System Energy [Member] | System Energy Settlement with the LPSC [Member] | Entergy Louisiana [Member]
Payments for Legal Settlements																														80,000
System Energy [Member] | Return on Equity and Capital Structure Complaints [Member]
Return on equity for MISO transmission owners		9.98%
System Energy [Member] | System Energy Settlement with the MPSC [Member]
Previously recorded liability related to applicable litigation														37,000
Regulatory charge related to System Energy settlement - net of tax														413,000
System Energy [Member] | System Energy Settlement with the MPSC [Member] | Entergy Mississippi [Member]
Public Utilities, Approved Return on Equity, Percentage													9.65%
Public Utilities, Approved Equity Capital Structure, Percentage													52.00%
Payments for Legal Settlements												235,000		235,000
System Energy [Member] | System Energy Settlement with the MPSC [Member] | Entergy Arkansas, Entergy New Orleans, and Entergy Louisiana
Payments for Legal Settlements														353,000
System Energy [Member] | System Energy Settlement with the MPSC [Member] | Complaints against System Energy [Member]
Regulatory Liability, Noncurrent														588,000
Increase (Decrease) in Regulatory Liabilities														551,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints
Payments for Legal Settlements							103,500			103,500
Regulatory charge related to System Energy settlement - net of tax														413,000
Estimated Litigation Liability															37,000
Black box refund																															18,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Sale-leaseback and depreciation-related refunds [Member]
Regulatory Asset							40,500
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Entergy New Orleans [Member]
Payments for Legal Settlements																														98,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Entergy Arkansas [Member]
Payments for Legal Settlements																														93,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Entergy Louisiana [Member]
Payments for Legal Settlements																														80,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Entergy Mississippi [Member]
Payments for Legal Settlements												$ 235,000		235,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Entergy Arkansas, Entergy New Orleans, and Entergy Louisiana
Payments for Legal Settlements														353,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Complaints against System Energy [Member]
Regulatory Liability, Noncurrent														588,000
Increase (Decrease) in Regulatory Liabilities														551,000															$ 40,000
System Energy [Member] | System Energy Regulatory Liability for Pending Complaints | Complaints against System Energy [Member] | Entergy Arkansas [Member]
Regulatory Liability, Noncurrent																															93,000
System Energy [Member] | Grand Gulf [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage																												11.50%
System Energy [Member] | Grand Gulf [Member] | System Energy Settlement with the City Council [Member] | Entergy New Orleans [Member]
Public Utilities, Approved Return on Equity, Percentage					9.65%
Public Utilities, Approved Equity Capital Structure, Percentage					52.00%
System Energy [Member] | Grand Gulf [Member] | System Energy Settlement with the LPSC [Member] | Entergy Louisiana [Member]
Public Utilities, Approved Return on Equity, Percentage			9.65%
Public Utilities, Approved Equity Capital Structure, Percentage			52.00%
System Energy [Member] | First Refund Period [Member]
APSC/MPSC revised argued authorized return on equity for System Energy in return on equity proceeding																							8.26%
System Energy [Member] | Second refund period [Member]
APSC/MPSC revised argued authorized return on equity for System Energy in return on equity proceeding																							8.32%
System Energy [Member] | Minimum [Member]
Recommended adjustment to earned return on equity																										8.37%
System Energy [Member] | Maximum [Member]
Recommended adjustment to earned return on equity																										8.67%
Percent Equity in Proposed Common Equity Ratio																							37.00%
Percent Debt in Proposed Common Equity Ratio																							63.00%
APSC and MPSC Argued Equity Capital Structure, Percentage																							35.98%
FERC Percent Equity in Proposed Common Equity Ratio																						46.74%
FERC Percent Debt in Proposed Common Equity Ratio																						53.26%
ALJ Recommended Equity Capital Structure, Percentage																		48.15%
Entergy Arkansas [Member]
Income Tax Expense (Benefit)																														74,574	(99,210)	80,896
Payments for Legal Settlements																									$ 135,000
Increase (Decrease) in Other Regulatory Assets																														(185,251)	6,197	120,603
Incremental Fuel and Replacement Energy Costs																											$ 65,900
Regulatory Liability, Noncurrent																														831,165	759,181
Increase (Decrease) in Regulatory Liabilities																														97,049	240,762	(264,054)
Entergy Arkansas [Member] | Unit Power Sales Agreement Complaint [Member]
Proceeds from Legal Settlements										41,700
Entergy Arkansas [Member] | System Energy Settlement with the APSC [Member] | System Energy [Member]
Proceeds from Legal Settlements							49,500
Entergy Louisiana [Member]
Income Tax Expense (Benefit)																														225,409	(205,781)	(162,853)
Proceeds from Legal Settlements																									59,000
Increase (Decrease) in Other Regulatory Assets																														(1,937)	(407,327)	(720,487)
Regulatory Liability, Noncurrent																														1,692,547	1,407,689
Increase (Decrease) in Regulatory Liabilities									$ 103,000						$ 224,000															452,731	225,645	(4,783)
Entergy Louisiana [Member] | Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member]
Payments for Legal Settlements							18,200
Entergy Louisiana [Member] | Unit Power Sales Agreement Complaint [Member]
Proceeds from Legal Settlements										27,800
Entergy Louisiana [Member] | System Energy Settlement with the LPSC [Member]
Proceeds from Legal Settlements				$ 15,000
Black box refund				$ 95,000
Entergy New Orleans [Member]
Income Tax Expense (Benefit)																														2,842	(189,973)	24,277
Proceeds from Legal Settlements																									7,000
Increase (Decrease) in Other Regulatory Assets																														(25,424)	(19,745)	(46,505)
Regulatory Liability, Noncurrent																														260,312	90,434
Increase (Decrease) in Regulatory Liabilities																														175,808	66,022	(8,639)
Entergy New Orleans [Member] | Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member]
Payments for Legal Settlements							$ 22,300
Entergy New Orleans [Member] | Unit Power Sales Agreement Complaint [Member]
Proceeds from Legal Settlements										$ 34,000
Entergy New Orleans [Member] | System Energy Settlement with the City Council [Member]
Proceeds from Legal Settlements						$ 18,000
Entergy Mississippi [Member]
Income Tax Expense (Benefit)																														80,315	54,364	54,864
Proceeds from Legal Settlements																									$ 36,000
Increase (Decrease) in Other Regulatory Assets																														(53,229)	59,616	57,028
Regulatory Liability, Noncurrent																														59,544	33,696
Increase (Decrease) in Regulatory Liabilities																														17,985	$ (59,513)	$ 20,165
Entergy Mississippi [Member] | Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member]
Allocated sale-leaseback annual renewal costs																														$ 5,700
Entergy Mississippi [Member] | System Energy Settlement with the MPSC [Member]
Proceeds from Legal Settlements														$ 235,000
Black box refund													$ 235,000
Entergy Mississippi [Member] | Grand Gulf [Member] | System Energy Settlement with the MPSC [Member]
Long-Term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased																														40.00%