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Risk Management And Fair Values (Tables) | 3 Months Ended
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Mar. 31, 2025
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] | The fair values of Entergy’s derivative instruments not designated as hedging instruments on the consolidated balance sheets as of March 31, 2025 and December 31, 2024 are shown in the table below. Certain investments, including those not designated as hedging instruments, are subject to master netting agreements and are presented in the balance sheet on a net basis in accordance with accounting guidance for derivatives and hedging.
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d)
|  |  |  | (In Millions)
2025 |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $8 |  | $— |  | $8
Financial transmission rights |  | Prepayments and other |  | $7 |  | $— |  | $7
2024 |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $2 |  | $— |  | $2
Financial transmission rights |  | Prepayments and other |  | $21 |  | ($1) |  | $20
Liabilities: |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($—) |  | $1 |  | $1
(a)Represents the gross amounts of recognized assets/liabilities (b)Represents the netting of fair value balances with the same counterparty (c)Represents the net amounts of assets/liabilities presented on the Entergy Corporation and Subsidiaries’ Consolidated Balance Sheets (d)Excludes letters of credit posted with MISO to cover financial transmission rights exposure in the amount of $2 million as of December 31, 2024
Derivatives Not Designated as Hedging Instruments [Table Text Block] | The effects of Entergy’s derivative instruments not designated as hedging instruments on the consolidated income statements for the three months ended March 31, 2025 and 2024 are as follows:
Instrument |  | Income Statement Location |  | Amount of gain (loss) recorded in the income statement
|  |  |  | (In Millions)
2025 |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale | (a) | $11
Financial transmission rights |  | Purchased power expense | (b) | $49
2024 |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale | (a) | ($6)
Financial transmission rights |  | Purchased power expense | (b) | $53
(a)Due to regulatory treatment, the natural gas swaps are marked-to-market through fuel, fuel-related expenses, and gas purchased for resale and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as fuel expenses when the swaps are settled are recovered or refunded through fuel cost recovery mechanisms. (b)Due to regulatory treatment, the changes in the estimated fair value of financial transmission rights for the Utility operating companies are recorded through purchased power expense and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as purchased power expense when the financial transmission rights for the Utility operating companies are settled are recovered or refunded through fuel cost recovery mechanisms.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following tables set forth, by level within the fair value hierarchy, Entergy’s assets and liabilities that are accounted for at fair value on a recurring basis as of March 31, 2025 and December 31, 2024. The assessment of the significance of a particular input to a fair value measurement requires judgment and may affect placement within the fair value hierarchy levels.
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $1,444 |  |  | $— |  |  | $— |  |  | $1,444 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 41 |  |  | — |  |  | — |  |  | 41 |
Debt securities |  | 861 |  |  | 1,230 |  |  | — |  |  | 2,091 |
Common trusts (b) |  |  |  |  |  |  |  | 3,315 |
Securitization recovery trust account |  | 10 |  |  | — |  |  | — |  |  | 10 |
Storm reserve escrow accounts |  | 300 |  |  | — |  |  | — |  |  | 300 |
Natural gas swaps |  | 8 |  |  | — |  |  | — |  |  | 8 |
Financial transmission rights |  | — |  |  | — |  |  | 7 |  |  | 7 |
|  | $2,664 |  |  | $1,230 |  |  | $7 |  |  | $7,216 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $811 |  |  | $— |  |  | $— |  |  | $811 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 30 |  |  | — |  |  | — |  |  | 30 |
Debt securities |  | 848 |  |  | 1,199 |  |  | — |  |  | 2,047 |
Common trusts (b) |  |  |  |  |  |  |  | 3,486 |
Securitization recovery trust account |  | 4 |  |  | — |  |  | — |  |  | 4 |
Storm reserve escrow accounts |  | 340 |  |  | — |  |  | — |  |  | 340 |
Natural gas swaps |  | 2 |  |  | — |  |  | — |  |  | 2 |
Financial transmission rights |  | — |  |  | — |  |  | 20 |  |  | 20 |
|  | $2,035 |  |  | $1,199 |  |  | $20 |  |  | $6,740 |
Liabilities: |  |  |  |  |  |  |  |
Financial transmission rights |  | $— |  |  | $— |  |  | $1 |  |  | $1 |
(a)The decommissioning trust funds hold equity and fixed income securities. Equity securities are invested to approximate the returns of major market indices. Fixed income securities are held in various governmental and corporate securities. See Note 9 to the financial statements herein for additional information on the investment portfolios. (b)Common trust funds are not publicly quoted and are valued by the fund administrators using net asset value as a practical expedient. Accordingly, these funds are not assigned a level in the fair value table. The fund administrator of these investments allows daily trading at the net asset value and trades settle at a later date.
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table sets forth a reconciliation of changes in the net assets for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2025 and 2024:
| 2025 |  | 2024
| (In Millions)
Balance as of January 1, | $20 |  |  | $21 |
Gains included as a regulatory liability/asset | 36 |  |  | 41 |
Settlements | (49) |  |  | (53) |
Balance as of March 31, | $7 |  |  | $9 |
Entergy Arkansas [Member] |
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] | The fair values of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ balance sheets as of March 31, 2025 and December 31, 2024 are shown in the tables below. Certain investments, including those not designated as hedging instruments, are subject to master netting agreements and are presented in the balance sheet on a net basis in accordance with accounting guidance for derivatives and hedging.
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $8.4 |  | $— |  | $8.4 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $3.0 |  | $— |  | $3.0 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $3.4 |  | $— |  | $3.4 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $0.4 |  | $— |  | $0.4 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $0.6 |  | ($0.2) |  | $0.4 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.2) |  | $0.3 |  | $0.1 |  | Entergy Mississippi
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2024 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $1.6 |  | $— |  | $1.6 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $8.6 |  | ($0.1) |  | $8.5 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $8.7 |  | ($0.1) |  | $8.6 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $1.3 |  | $— |  | $1.3 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $2.0 |  | ($0.1) |  | $1.9 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.4) |  | $0.9 |  | $0.5 |  | Entergy Mississippi
(a)Represents the gross amounts of recognized assets/liabilities (b)Represents the netting of fair value balances with the same counterparty (c)Represents the net amounts of assets/liabilities presented on the Registrant Subsidiaries’ balance sheets (d)Excludes letters of credit posted with MISO to cover financial transmission rights exposure in the amount of $0.5 million for Entergy Arkansas, $0.1 million for Entergy Louisiana, $0.8 million for Entergy Mississippi, $0.1 million for Entergy New Orleans, and $0.3 million for Entergy Texas as of December 31, 2024.
Derivatives Not Designated as Hedging Instruments [Table Text Block] | The effects of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ income statements for the three months ended March 31, 2025 and 2024 are as follows:
Instrument |  | Income Statement Location |  | Amount of gain (loss) recorded in the income statement |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $11.4 | (a) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $18.8 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $22.0 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $2.0 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $2.2 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $3.5 | (b) | Entergy Texas
2024 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $5.2 | (a) | Entergy Mississippi
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $0.5 | (a) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $26.9 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $16.2 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $7.5 | (b) | Entergy Texas
(a)Due to regulatory treatment, the natural gas swaps are marked-to-market through fuel, fuel-related expenses, and gas purchased for resale and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as fuel expenses when the swaps are settled are recovered or refunded through fuel cost recovery mechanisms. (b)Due to regulatory treatment, the changes in the estimated fair value of financial transmission rights for the Utility operating companies are recorded through purchased power expense and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as purchased power expense when the financial transmission rights for the Utility operating companies are settled are recovered or refunded through fuel cost recovery mechanisms.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | The following tables set forth, by level within the fair value hierarchy, the Registrant Subsidiaries’ assets and liabilities that are accounted for at fair value on a recurring basis as of March 31, 2025 and December 31, 2024. The assessment of the significance of a particular input to a fair value measurement requires judgment and may affect placement within the fair value hierarchy levels. Entergy Arkansas
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $54.9 |  |  | $— |  |  | $— |  |  | $54.9 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 19.5 |  |  | — |  |  | — |  |  | 19.5 |
Debt securities |  | 265.9 |  |  | 324.2 |  |  | — |  |  | 590.1 |
Common trusts (b) |  |  |  |  |  |  |  | 961.6 |
Financial transmission rights |  | — |  |  | — |  |  | 3.0 |  |  | 3.0 |
|  | $340.3 |  |  | $324.2 |  |  | $3.0 |  |  | $1,629.1 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $3.4 |  |  | $— |  |  | $— |  |  | $3.4 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 12.9 |  |  | — |  |  | — |  |  | 12.9 |
Debt securities |  | 259.9 |  |  | 319.1 |  |  | — |  |  | 579.0 |
Common trusts (b) |  |  |  |  |  |  |  | 1,012.5 |
Financial transmission rights |  | — |  |  | — |  |  | 8.5 |  |  | 8.5 |
|  | $276.2 |  |  | $319.1 |  |  | $8.5 |  |  | $1,616.3 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table sets forth a reconciliation of changes in the net assets (liabilities) for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2025.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $8.6 |  |  | $8.6 |  |  | ($0.5) |  |  | $1.3 |  |  | $1.9 |
Gains included as a regulatory liability/asset | 13.2 |  |  | 16.8 |  |  | 2.4 |  |  | 1.3 |  |  | 2.0 |
Settlements | (18.8) |  |  | (22.0) |  |  | (2.0) |  |  | (2.2) |  |  | (3.5) |
Balance as of March 31, | $3.0 |  |  | $3.4 |  |  | ($0.1) |  |  | $0.4 |  |  | $0.4 |
The following table sets forth a reconciliation of changes in the net assets for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2024.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $6.0 |  |  | $9.8 |  |  | $1.4 |  |  | $1.1 |  |  | $2.4 |
Gains included as a regulatory liability/asset | 23.7 |  |  | 10.5 |  |  | 0.3 |  |  | 0.5 |  |  | 6.3 |
Settlements | (26.9) |  |  | (16.2) |  |  | (1.1) |  |  | (1.1) |  |  | (7.5) |
Balance as of March 31, | $2.8 |  |  | $4.1 |  |  | $0.6 |  |  | $0.5 |  |  | $1.2 |
Entergy Louisiana [Member] |
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] | The fair values of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ balance sheets as of March 31, 2025 and December 31, 2024 are shown in the tables below. Certain investments, including those not designated as hedging instruments, are subject to master netting agreements and are presented in the balance sheet on a net basis in accordance with accounting guidance for derivatives and hedging.
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $8.4 |  | $— |  | $8.4 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $3.0 |  | $— |  | $3.0 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $3.4 |  | $— |  | $3.4 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $0.4 |  | $— |  | $0.4 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $0.6 |  | ($0.2) |  | $0.4 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.2) |  | $0.3 |  | $0.1 |  | Entergy Mississippi
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2024 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $1.6 |  | $— |  | $1.6 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $8.6 |  | ($0.1) |  | $8.5 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $8.7 |  | ($0.1) |  | $8.6 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $1.3 |  | $— |  | $1.3 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $2.0 |  | ($0.1) |  | $1.9 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.4) |  | $0.9 |  | $0.5 |  | Entergy Mississippi
(a)Represents the gross amounts of recognized assets/liabilities (b)Represents the netting of fair value balances with the same counterparty (c)Represents the net amounts of assets/liabilities presented on the Registrant Subsidiaries’ balance sheets (d)Excludes letters of credit posted with MISO to cover financial transmission rights exposure in the amount of $0.5 million for Entergy Arkansas, $0.1 million for Entergy Louisiana, $0.8 million for Entergy Mississippi, $0.1 million for Entergy New Orleans, and $0.3 million for Entergy Texas as of December 31, 2024.
Derivatives Not Designated as Hedging Instruments [Table Text Block] | The effects of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ income statements for the three months ended March 31, 2025 and 2024 are as follows:
Instrument |  | Income Statement Location |  | Amount of gain (loss) recorded in the income statement |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $11.4 | (a) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $18.8 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $22.0 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $2.0 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $2.2 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $3.5 | (b) | Entergy Texas
2024 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $5.2 | (a) | Entergy Mississippi
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $0.5 | (a) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $26.9 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $16.2 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $7.5 | (b) | Entergy Texas
(a)Due to regulatory treatment, the natural gas swaps are marked-to-market through fuel, fuel-related expenses, and gas purchased for resale and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as fuel expenses when the swaps are settled are recovered or refunded through fuel cost recovery mechanisms. (b)Due to regulatory treatment, the changes in the estimated fair value of financial transmission rights for the Utility operating companies are recorded through purchased power expense and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as purchased power expense when the financial transmission rights for the Utility operating companies are settled are recovered or refunded through fuel cost recovery mechanisms.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Entergy Louisiana
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $392.0 |  |  | $— |  |  | $— |  |  | $392.0 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 17.1 |  |  | — |  |  | — |  |  | 17.1 |
Debt securities |  | 329.2 |  |  | 596.9 |  |  | — |  |  | 926.1 |
Common trusts (b) |  |  |  |  |  |  |  | 1,435.0 |
Storm reserve escrow account |  | 226.0 |  |  | — |  |  | — |  |  | 226.0 |
Financial transmission rights |  | — |  |  | — |  |  | 3.4 |  |  | 3.4 |
|  | $964.3 |  |  | $596.9 |  |  | $3.4 |  |  | $2,999.6 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $326.8 |  |  | $— |  |  | $— |  |  | $326.8 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 14.5 |  |  | — |  |  | — |  |  | 14.5 |
Debt securities |  | 326.0 |  |  | 582.1 |  |  | — |  |  | 908.1 |
Common trusts (b) |  |  |  |  |  |  |  | 1,506.5 |
Storm reserve escrow account |  | 256.7 |  |  | — |  |  | — |  |  | 256.7 |
Financial transmission rights |  | — |  |  | — |  |  | 8.6 |  |  | 8.6 |
|  | $924.0 |  |  | $582.1 |  |  | $8.6 |  |  | $3,021.2 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table sets forth a reconciliation of changes in the net assets (liabilities) for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2025.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $8.6 |  |  | $8.6 |  |  | ($0.5) |  |  | $1.3 |  |  | $1.9 |
Gains included as a regulatory liability/asset | 13.2 |  |  | 16.8 |  |  | 2.4 |  |  | 1.3 |  |  | 2.0 |
Settlements | (18.8) |  |  | (22.0) |  |  | (2.0) |  |  | (2.2) |  |  | (3.5) |
Balance as of March 31, | $3.0 |  |  | $3.4 |  |  | ($0.1) |  |  | $0.4 |  |  | $0.4 |
The following table sets forth a reconciliation of changes in the net assets for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2024.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $6.0 |  |  | $9.8 |  |  | $1.4 |  |  | $1.1 |  |  | $2.4 |
Gains included as a regulatory liability/asset | 23.7 |  |  | 10.5 |  |  | 0.3 |  |  | 0.5 |  |  | 6.3 |
Settlements | (26.9) |  |  | (16.2) |  |  | (1.1) |  |  | (1.1) |  |  | (7.5) |
Balance as of March 31, | $2.8 |  |  | $4.1 |  |  | $0.6 |  |  | $0.5 |  |  | $1.2 |
Entergy Mississippi [Member] |
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] | The fair values of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ balance sheets as of March 31, 2025 and December 31, 2024 are shown in the tables below. Certain investments, including those not designated as hedging instruments, are subject to master netting agreements and are presented in the balance sheet on a net basis in accordance with accounting guidance for derivatives and hedging.
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $8.4 |  | $— |  | $8.4 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $3.0 |  | $— |  | $3.0 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $3.4 |  | $— |  | $3.4 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $0.4 |  | $— |  | $0.4 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $0.6 |  | ($0.2) |  | $0.4 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.2) |  | $0.3 |  | $0.1 |  | Entergy Mississippi
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2024 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $1.6 |  | $— |  | $1.6 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $8.6 |  | ($0.1) |  | $8.5 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $8.7 |  | ($0.1) |  | $8.6 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $1.3 |  | $— |  | $1.3 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $2.0 |  | ($0.1) |  | $1.9 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.4) |  | $0.9 |  | $0.5 |  | Entergy Mississippi
(a)Represents the gross amounts of recognized assets/liabilities (b)Represents the netting of fair value balances with the same counterparty (c)Represents the net amounts of assets/liabilities presented on the Registrant Subsidiaries’ balance sheets (d)Excludes letters of credit posted with MISO to cover financial transmission rights exposure in the amount of $0.5 million for Entergy Arkansas, $0.1 million for Entergy Louisiana, $0.8 million for Entergy Mississippi, $0.1 million for Entergy New Orleans, and $0.3 million for Entergy Texas as of December 31, 2024.
Derivatives Not Designated as Hedging Instruments [Table Text Block] | The effects of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ income statements for the three months ended March 31, 2025 and 2024 are as follows:
Instrument |  | Income Statement Location |  | Amount of gain (loss) recorded in the income statement |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $11.4 | (a) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $18.8 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $22.0 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $2.0 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $2.2 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $3.5 | (b) | Entergy Texas
2024 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $5.2 | (a) | Entergy Mississippi
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $0.5 | (a) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $26.9 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $16.2 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $7.5 | (b) | Entergy Texas
(a)Due to regulatory treatment, the natural gas swaps are marked-to-market through fuel, fuel-related expenses, and gas purchased for resale and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as fuel expenses when the swaps are settled are recovered or refunded through fuel cost recovery mechanisms. (b)Due to regulatory treatment, the changes in the estimated fair value of financial transmission rights for the Utility operating companies are recorded through purchased power expense and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as purchased power expense when the financial transmission rights for the Utility operating companies are settled are recovered or refunded through fuel cost recovery mechanisms.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Entergy Mississippi
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $598.0 |  |  | $— |  |  | $— |  |  | $598.0 |
Natural gas swaps |  | 8.4 |  |  | — |  |  | — |  |  | 8.4 |
|  | $606.4 |  |  | $— |  |  | $— |  |  | $606.4 |
Liabilities: |  |  |  |  |  |  |  |
Financial transmission rights |  | $— |  |  | $— |  |  | $0.1 |  |  | $0.1 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $155.5 |  |  | $— |  |  | $— |  |  | $155.5 |
Natural gas swaps |  | 1.6 |  |  | — |  |  | — |  |  | 1.6 |
|  | $157.1 |  |  | $— |  |  | $— |  |  | $157.1 |
Liabilities: |  |  |  |  |  |  |  |
Financial transmission rights |  | $— |  |  | $— |  |  | $0.5 |  |  | $0.5 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table sets forth a reconciliation of changes in the net assets (liabilities) for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2025.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $8.6 |  |  | $8.6 |  |  | ($0.5) |  |  | $1.3 |  |  | $1.9 |
Gains included as a regulatory liability/asset | 13.2 |  |  | 16.8 |  |  | 2.4 |  |  | 1.3 |  |  | 2.0 |
Settlements | (18.8) |  |  | (22.0) |  |  | (2.0) |  |  | (2.2) |  |  | (3.5) |
Balance as of March 31, | $3.0 |  |  | $3.4 |  |  | ($0.1) |  |  | $0.4 |  |  | $0.4 |
The following table sets forth a reconciliation of changes in the net assets for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2024.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $6.0 |  |  | $9.8 |  |  | $1.4 |  |  | $1.1 |  |  | $2.4 |
Gains included as a regulatory liability/asset | 23.7 |  |  | 10.5 |  |  | 0.3 |  |  | 0.5 |  |  | 6.3 |
Settlements | (26.9) |  |  | (16.2) |  |  | (1.1) |  |  | (1.1) |  |  | (7.5) |
Balance as of March 31, | $2.8 |  |  | $4.1 |  |  | $0.6 |  |  | $0.5 |  |  | $1.2 |
Entergy New Orleans [Member] |
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] | The fair values of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ balance sheets as of March 31, 2025 and December 31, 2024 are shown in the tables below. Certain investments, including those not designated as hedging instruments, are subject to master netting agreements and are presented in the balance sheet on a net basis in accordance with accounting guidance for derivatives and hedging.
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $8.4 |  | $— |  | $8.4 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $3.0 |  | $— |  | $3.0 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $3.4 |  | $— |  | $3.4 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $0.4 |  | $— |  | $0.4 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $0.6 |  | ($0.2) |  | $0.4 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.2) |  | $0.3 |  | $0.1 |  | Entergy Mississippi
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2024 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $1.6 |  | $— |  | $1.6 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $8.6 |  | ($0.1) |  | $8.5 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $8.7 |  | ($0.1) |  | $8.6 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $1.3 |  | $— |  | $1.3 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $2.0 |  | ($0.1) |  | $1.9 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.4) |  | $0.9 |  | $0.5 |  | Entergy Mississippi
(a)Represents the gross amounts of recognized assets/liabilities (b)Represents the netting of fair value balances with the same counterparty (c)Represents the net amounts of assets/liabilities presented on the Registrant Subsidiaries’ balance sheets (d)Excludes letters of credit posted with MISO to cover financial transmission rights exposure in the amount of $0.5 million for Entergy Arkansas, $0.1 million for Entergy Louisiana, $0.8 million for Entergy Mississippi, $0.1 million for Entergy New Orleans, and $0.3 million for Entergy Texas as of December 31, 2024.
Derivatives Not Designated as Hedging Instruments [Table Text Block] | The effects of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ income statements for the three months ended March 31, 2025 and 2024 are as follows:
Instrument |  | Income Statement Location |  | Amount of gain (loss) recorded in the income statement |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $11.4 | (a) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $18.8 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $22.0 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $2.0 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $2.2 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $3.5 | (b) | Entergy Texas
2024 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $5.2 | (a) | Entergy Mississippi
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $0.5 | (a) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $26.9 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $16.2 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $7.5 | (b) | Entergy Texas
(a)Due to regulatory treatment, the natural gas swaps are marked-to-market through fuel, fuel-related expenses, and gas purchased for resale and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as fuel expenses when the swaps are settled are recovered or refunded through fuel cost recovery mechanisms. (b)Due to regulatory treatment, the changes in the estimated fair value of financial transmission rights for the Utility operating companies are recorded through purchased power expense and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as purchased power expense when the financial transmission rights for the Utility operating companies are settled are recovered or refunded through fuel cost recovery mechanisms.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Entergy New Orleans
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $13.9 |  |  | $— |  |  | $— |  |  | $13.9 |
Securitization recovery trust account |  | 0.9 |  |  | — |  |  | — |  |  | 0.9 |
Storm reserve escrow account |  | 74.3 |  |  | — |  |  | — |  |  | 74.3 |
Financial transmission rights |  | — |  |  | — |  |  | 0.4 |  |  | 0.4 |
|  | $89.1 |  |  | $— |  |  | $0.4 |  |  | $89.5 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $31.4 |  |  | $— |  |  | $— |  |  | $31.4 |
Securitization recovery trust account |  | 1.6 |  |  | — |  |  | — |  |  | 1.6 |
Storm reserve escrow account |  | 83.7 |  |  | — |  |  | — |  |  | 83.7 |
Financial transmission rights |  | — |  |  | — |  |  | 1.3 |  |  | 1.3 |
|  | $116.7 |  |  | $— |  |  | $1.3 |  |  | $118.0 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table sets forth a reconciliation of changes in the net assets (liabilities) for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2025.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $8.6 |  |  | $8.6 |  |  | ($0.5) |  |  | $1.3 |  |  | $1.9 |
Gains included as a regulatory liability/asset | 13.2 |  |  | 16.8 |  |  | 2.4 |  |  | 1.3 |  |  | 2.0 |
Settlements | (18.8) |  |  | (22.0) |  |  | (2.0) |  |  | (2.2) |  |  | (3.5) |
Balance as of March 31, | $3.0 |  |  | $3.4 |  |  | ($0.1) |  |  | $0.4 |  |  | $0.4 |
The following table sets forth a reconciliation of changes in the net assets for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2024.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $6.0 |  |  | $9.8 |  |  | $1.4 |  |  | $1.1 |  |  | $2.4 |
Gains included as a regulatory liability/asset | 23.7 |  |  | 10.5 |  |  | 0.3 |  |  | 0.5 |  |  | 6.3 |
Settlements | (26.9) |  |  | (16.2) |  |  | (1.1) |  |  | (1.1) |  |  | (7.5) |
Balance as of March 31, | $2.8 |  |  | $4.1 |  |  | $0.6 |  |  | $0.5 |  |  | $1.2 |
Entergy Texas [Member] |
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] | The fair values of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ balance sheets as of March 31, 2025 and December 31, 2024 are shown in the tables below. Certain investments, including those not designated as hedging instruments, are subject to master netting agreements and are presented in the balance sheet on a net basis in accordance with accounting guidance for derivatives and hedging.
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $8.4 |  | $— |  | $8.4 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $3.0 |  | $— |  | $3.0 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $3.4 |  | $— |  | $3.4 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $0.4 |  | $— |  | $0.4 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $0.6 |  | ($0.2) |  | $0.4 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.2) |  | $0.3 |  | $0.1 |  | Entergy Mississippi
Instrument |  | Balance Sheet Location |  | Gross Fair Value (a) |  | Offsetting Position (b) |  | Net Fair Value (c) (d) |  | Registrant
|  |  |  | (In Millions) |  |
2024 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Natural gas swaps |  | Prepayments and other |  | $1.6 |  | $— |  | $1.6 |  | Entergy Mississippi
Financial transmission rights |  | Prepayments and other |  | $8.6 |  | ($0.1) |  | $8.5 |  | Entergy Arkansas
Financial transmission rights |  | Prepayments and other |  | $8.7 |  | ($0.1) |  | $8.6 |  | Entergy Louisiana
Financial transmission rights |  | Prepayments and other |  | $1.3 |  | $— |  | $1.3 |  | Entergy New Orleans
Financial transmission rights |  | Prepayments and other |  | $2.0 |  | ($0.1) |  | $1.9 |  | Entergy Texas
Liabilities: |  |  |  |  |  |  |  |  |  |
Financial transmission rights |  | Other current liabilities |  | ($0.4) |  | $0.9 |  | $0.5 |  | Entergy Mississippi
(a)Represents the gross amounts of recognized assets/liabilities (b)Represents the netting of fair value balances with the same counterparty (c)Represents the net amounts of assets/liabilities presented on the Registrant Subsidiaries’ balance sheets (d)Excludes letters of credit posted with MISO to cover financial transmission rights exposure in the amount of $0.5 million for Entergy Arkansas, $0.1 million for Entergy Louisiana, $0.8 million for Entergy Mississippi, $0.1 million for Entergy New Orleans, and $0.3 million for Entergy Texas as of December 31, 2024.
Derivatives Not Designated as Hedging Instruments [Table Text Block] | The effects of derivative instruments not designated as hedging instruments on the Registrant Subsidiaries’ income statements for the three months ended March 31, 2025 and 2024 are as follows:
Instrument |  | Income Statement Location |  | Amount of gain (loss) recorded in the income statement |  | Registrant
|  |  |  | (In Millions) |  |
2025 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $11.4 | (a) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $18.8 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $22.0 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $2.0 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $2.2 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $3.5 | (b) | Entergy Texas
2024 |  |  |  |  |  |
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $5.2 | (a) | Entergy Mississippi
Natural gas swaps |  | Fuel, fuel-related expenses, and gas purchased for resale |  | $0.5 | (a) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $26.9 | (b) | Entergy Arkansas
Financial transmission rights |  | Purchased power expense |  | $16.2 | (b) | Entergy Louisiana
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy Mississippi
Financial transmission rights |  | Purchased power expense |  | $1.1 | (b) | Entergy New Orleans
Financial transmission rights |  | Purchased power expense |  | $7.5 | (b) | Entergy Texas
(a)Due to regulatory treatment, the natural gas swaps are marked-to-market through fuel, fuel-related expenses, and gas purchased for resale and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as fuel expenses when the swaps are settled are recovered or refunded through fuel cost recovery mechanisms. (b)Due to regulatory treatment, the changes in the estimated fair value of financial transmission rights for the Utility operating companies are recorded through purchased power expense and then such amounts are simultaneously reversed and recorded as an offsetting regulatory asset or liability. The gains or losses recorded as purchased power expense when the financial transmission rights for the Utility operating companies are settled are recovered or refunded through fuel cost recovery mechanisms.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Entergy Texas
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $298.0 |  |  | $— |  |  | $— |  |  | $298.0 |
Securitization recovery trust account |  | 8.8 |  |  | — |  |  | — |  |  | 8.8 |
Financial transmission rights |  | — |  |  | — |  |  | 0.4 |  |  | 0.4 |
|  | $306.8 |  |  | $— |  |  | $0.4 |  |  | $307.2 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $184.7 |  |  | $— |  |  | $— |  |  | $184.7 |
Securitization recovery trust account |  | 2.7 |  |  | — |  |  | — |  |  | 2.7 |
Financial transmission rights |  | — |  |  | — |  |  | 1.9 |  |  | 1.9 |
|  | $187.4 |  |  | $— |  |  | $1.9 |  |  | $189.3 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation | The following table sets forth a reconciliation of changes in the net assets (liabilities) for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2025.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $8.6 |  |  | $8.6 |  |  | ($0.5) |  |  | $1.3 |  |  | $1.9 |
Gains included as a regulatory liability/asset | 13.2 |  |  | 16.8 |  |  | 2.4 |  |  | 1.3 |  |  | 2.0 |
Settlements | (18.8) |  |  | (22.0) |  |  | (2.0) |  |  | (2.2) |  |  | (3.5) |
Balance as of March 31, | $3.0 |  |  | $3.4 |  |  | ($0.1) |  |  | $0.4 |  |  | $0.4 |
The following table sets forth a reconciliation of changes in the net assets for the fair value of financial transmission rights classified as Level 3 in the fair value hierarchy for the three months ended March 31, 2024.
| Entergy Arkansas |  | Entergy Louisiana |  | Entergy Mississippi |  | Entergy New Orleans |  | Entergy Texas
| (In Millions)
Balance as of January 1, | $6.0 |  |  | $9.8 |  |  | $1.4 |  |  | $1.1 |  |  | $2.4 |
Gains included as a regulatory liability/asset | 23.7 |  |  | 10.5 |  |  | 0.3 |  |  | 0.5 |  |  | 6.3 |
Settlements | (26.9) |  |  | (16.2) |  |  | (1.1) |  |  | (1.1) |  |  | (7.5) |
Balance as of March 31, | $2.8 |  |  | $4.1 |  |  | $0.6 |  |  | $0.5 |  |  | $1.2 |
System Energy [Member] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | System Energy
2025 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $2.4 |  |  | $— |  |  | $— |  |  | $2.4 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 3.7 |  |  | — |  |  | — |  |  | 3.7 |
Debt securities |  | 266.0 |  |  | 308.9 |  |  | — |  |  | 574.9 |
Common trusts (b) |  |  |  |  |  |  |  | 918.7 |
|  | $272.1 |  |  | $308.9 |  |  | $— |  |  | $1,499.7 |
2024 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  | (In Millions)
Assets: |  |  |  |  |  |  |  |
Temporary cash investments |  | $28.5 |  |  | $— |  |  | $— |  |  | $28.5 |
Decommissioning trust funds (a): |  |  |  |  |  |  |  |
Equity securities |  | 2.4 |  |  | — |  |  | — |  |  | 2.4 |
Debt securities |  | 262.4 |  |  | 297.4 |  |  | — |  |  | 559.8 |
Common trusts (b) |  |  |  |  |  |  |  | 966.9 |
|  | $293.3 |  |  | $297.4 |  |  | $— |  |  | $1,557.6 |

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