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Rate And Regulatory Matters (Narrative - Complaints Against System Energy) (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 01, 2023 | Sep. 30, 2024 | Jul. 31, 2024 | Jun. 30, 2024 | May 31, 2024 | Apr. 30, 2024 | Oct. 31, 2023 | May 31, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Oct. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2018 | Dec. 31, 1988 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2022
Accounts Payable, Current |  |  |  | $ 1,314,661 |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,314,661 |  | $ 1,566,745 |
Regulatory Liability, Noncurrent |  |  |  | 3,488,314 |  |  |  |  |  |  |  |  |  |  |  |  | 3,488,314 |  | 3,116,926 |
System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Payable, Current |  |  |  | 43,623 |  |  |  |  |  |  |  |  |  |  |  |  | 43,623 |  | 73,580 |
Regulatory Liability, Noncurrent |  |  |  | $ 668,309 |  |  |  |  |  |  |  |  |  |  |  |  | 668,309 |  | 782,912 |
System Energy [Member] | Unit Power Sales Agreement Complaint [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Liability, Noncurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 178,000 |
System Energy [Member] | Entergy Arkansas [Member] | Unit Power Sales Agreement Complaint [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  |  |  |  | $ 92,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
System Energy [Member] | Grand Gulf [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] | Entergy Louisiana [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Return on Equity, Percentage |  | 9.65% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage |  | 52.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Entergy Louisiana [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Payable, Current |  |  |  | $ 406,932 |  |  |  |  |  |  |  |  |  |  |  |  | 406,932 |  | 467,414 |
Regulatory Liability, Noncurrent |  |  |  | 1,692,861 |  |  |  |  |  |  |  |  |  |  |  |  | 1,692,861 |  | 1,407,689 |
Entergy New Orleans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Payable, Current |  |  |  | 38,150 |  |  |  |  |  |  |  |  |  |  |  |  | 38,150 |  | 39,813 |
Regulatory Liability, Noncurrent |  |  |  | 259,613 |  |  |  |  |  |  |  |  |  |  |  |  | 259,613 |  | 90,434 |
Entergy Arkansas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 135,000 |  |  |  |  |
Accounts Payable, Current |  |  |  | 196,722 |  |  |  |  |  |  |  |  |  |  |  |  | 196,722 |  | 215,502 |
Regulatory Liability, Noncurrent |  |  |  | 803,680 |  |  |  |  |  |  |  |  |  |  |  |  | 803,680 |  | $ 759,181 |
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earned return on equity |  |  |  |  |  |  |  |  |  |  |  |  | 10.94% |  |  |  |  |  |  |
Recommended adjustment to earned return on equity |  |  |  |  |  |  |  |  |  |  |  |  | 9.32% |  |  |  |  |  |  |
Estimated return on equity complaint refund |  |  |  | 25,300 |  |  |  |  |  |  |  |  |  |  |  |  | 25,300 |  |  |
Return on equity complaint, estimated annual rate reduction |  |  |  | 15,000 |  |  |  |  |  |  |  |  |  |  |  |  | 15,000 |  |  |
Return on Equity and Capital Structure Complaints [Member] | System Energy [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ALJ recommended equity capital structure, percentage |  |  |  |  |  |  |  |  |  |  |  |  | 48.15% |  |  |  |  |  |  |
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disallowance of future sale-leaseback renewal costs recovery |  |  |  |  |  |  |  |  |  | $ 11,500 |  |  |  |  |  |  |  |  |  |
Calculated refund of sale-leaseback renewal rental costs, including interest |  |  |  |  |  |  |  |  | $ 89,800 |  |  |  |  |  |  |  |  |  |  |
One-time accumulated deferred income tax credit |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,200 |  |  |  |  |  |
Calculated net refund for excess depreciation expense |  |  |  |  |  |  |  |  | 13,700 |  |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  |  |  |  |  |  |  |  | $ 103,500 |  |  |  |  |  |  |  |  |  |  |
Recalculated Payments for Legal Settlements |  |  |  |  |  |  | $ 35,700 |  |  |  |  |  |  |  |  |  |  |  |  |
Recalculated proceeds from legal settlements |  |  |  |  |  |  | 67,800 |  |  |  |  |  |  |  |  |  |  |  |  |
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member] | Entergy Arkansas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recalculated proceeds from legal settlements |  |  |  |  |  |  | 27,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | System Energy [Member] | Grand Gulf [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11.50% |  |  |  |
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Entergy Louisiana [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  |  |  |  |  |  | 18,200 |  |  |  |  |  |  |  |  |  |  |  |  |
Grand Gulf Sale-leaseback Renewal Complaint and Uncertain Tax Position Rate Base Issue [Member] | Entergy New Orleans [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for Legal Settlements |  |  |  |  |  |  | 22,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Unit Power Sales Agreement Complaint [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential settlement refund |  |  |  |  |  |  |  |  |  |  | $ 18,000 |  |  |  |  |  |  |  |  |
FERC ALJ initial decision recommended refunds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,900 |  |  |
Interest component of FERC ALJ initial decision recommended refunds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 97,800 |  |  |
FERC ALJ initial decision modification to cash working capital allowance |  |  |  |  |  |  |  | $ 36,400 |  |  |  |  |  |  |  |  |  |  |  |
System Energy Settlement with the APSC [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory liabilitity related to settlements and potential future refunds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 588,000
System Energy Settlement with the APSC [Member] | System Energy [Member] | Entergy Arkansas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Return on Equity, Percentage | 9.65% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Equity Capital Structure, Percentage | 52.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
System Energy Settlement with the APSC [Member] | Entergy Arkansas [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative proceeds from legal settlements |  |  |  |  |  |  | 142,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  |  |  |  |  | $ 49,500 |  |  |  |  |  |  |  |  |  |  |  |  |
System Energy Settlement with the City Council [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory liabilitity related to settlements and potential future refunds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 588,000
System Energy Settlement with the City Council [Member] | System Energy [Member] | Entergy New Orleans [Member] | Unit Power Sales Agreement Complaint [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Payable, Current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 98,000 |  |
System Energy Settlement with the City Council [Member] | Entergy New Orleans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative proceeds from legal settlements |  |  |  |  |  | $ 116,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  |  |  |  | $ 18,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
System Energy Settlement with the City Council [Member] | Entergy Arkansas and and Entergy Mississippi | Grand Gulf [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 65.00% |  |  |
System Energy Settlement with the City Council [Member] | Entergy Arkansas and Entergy Mississippi and Entergy New Orleans [Member] | Grand Gulf [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00% |  |  |
System Energy Settlement with the LPSC | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory liabilitity related to settlements and potential future refunds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 588,000
System Energy Settlement with the LPSC | System Energy [Member] | Entergy Louisiana [Member] | Unit Power Sales Agreement Complaint [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts Payable, Current |  |  |  | $ 80,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 80,000 |  |  |
System Energy Settlement with the LPSC | Entergy Louisiana [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative proceeds from legal settlements |  |  | $ 95,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  | $ 15,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pension Costs Amendment Proceeding [Member] | System Energy [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  | $ 8,900 |  |  |  |  |  |  |  |

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