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v3.25.1

Decommissioning Trust Funds (Tables) | 3 Months Ended
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Mar. 31, 2025
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] | The fair value and gross unrealized losses of available-for-sale debt securities, summarized by length of time that the securities had been in a continuous loss position, were as follows as of March 31, 2025 and December 31, 2024:
|  | 2025 |  | 2024
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $638 |  |  | $14 |  |  | $1,102 |  |  | $24 |
More than 12 months |  | 469 |  |  | 48 |  |  | 510 |  |  | 56 |
Total |  | $1,107 |  |  | $62 |  |  | $1,612 |  |  | $80 |
Investments Classified by Contractual Maturity Date [Table Text Block] | The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2025 and December 31, 2024 were as follows:
| 2025 |  | 2024
| (In Millions)
Less than 1 year | $29 |  |  | $36 |
1 year - 5 years | 551 |  |  | 574 |
5 years - 10 years | 639 |  |  | 629 |
10 years - 15 years | 205 |  |  | 166 |
15 years - 20 years | 216 |  |  | 218 |
20 years+ | 451 |  |  | 424 |
Total | $2,091 |  |  | $2,047 |
Schedule of Realized Gain (Loss) | The following table summarizes proceeds from the dispositions of available-for-sale debt securities and the related gains and losses from the sales during the three months ended March 31, 2025 and 2024:
|  | 2025 |  | 2024 |  |  |  |
|  | (In Millions)
Proceeds from disposition of securities |  | $262 |  |  | $169 |  |  |  |  |
Realized gains |  | $1 |  |  | $— |  |  |  |  |
Realized losses |  | $4 |  |  | $7 |  |  |  |  |
Debt Securities, Available-for-Sale | The available-for-sale debt securities held as of March 31, 2025 and December 31, 2024 are summarized as follows:
|  | 2025 |  | 2024
|  | (In Millions)
Fair value |  | $2,091 |  |  | $2,047 |
Unrealized gains |  | $15 |  |  | $7 |
Unrealized losses |  | $62 |  |  | $80 |
Entergy Arkansas [Member] |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] | The fair value and gross unrealized losses of available-for-sale debt securities, summarized by length of time that the securities had been in a continuous loss position, were as follows as of March 31, 2025 and December 31, 2024:
|  | 2025 |  | 2024
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $158.4 |  |  | $3.9 |  |  | $282.8 |  |  | $8.2 |
More than 12 months |  | 183.0 |  |  | 14.2 |  |  | 195.0 |  |  | 17.6 |
Total |  | $341.4 |  |  | $18.1 |  |  | $477.8 |  |  | $25.8 |
Investments Classified by Contractual Maturity Date [Table Text Block] | The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2025 and December 31, 2024 were as follows:
| 2025 |  | 2024
| (In Millions)
Less than 1 year | $25.2 |  |  | $31.7 |
1 year - 5 years | 144.0 |  |  | 142.5 |
5 years - 10 years | 234.8 |  |  | 231.0 |
10 years - 15 years | 71.2 |  |  | 62.2 |
15 years - 20 years | 64.2 |  |  | 62.8 |
20 years+ | 50.7 |  |  | 48.8 |
Total | $590.1 |  |  | $579.0 |
Schedule of Realized Gain (Loss) | The following table summarizes proceeds from the dispositions of available-for-sale debt securities and the related gains and losses from the sales during the three months ended March 31, 2025 and 2024:
|  | 2025 |  | 2024 |  |  |  |
|  | (In Millions)
Proceeds from disposition of securities |  | $— |  |  | $12.4 |  |  |  |  |
Realized gains |  | $— |  |  | $— |  |  |  |  |
Realized losses |  | $— |  |  | $0.4 |  |  |  |  |
Debt Securities, Available-for-Sale | The available-for-sale debt securities held as of March 31, 2025 and December 31, 2024 are summarized as follows:
|  | 2025 |  | 2024
|  | (In Millions)
Fair value |  | $590.1 |  |  | $579.0 |
Unrealized gains |  | $4.0 |  |  | $1.2 |
Unrealized losses |  | $18.1 |  |  | $25.8 |
Entergy Louisiana [Member] |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] | The fair value and gross unrealized losses of available-for-sale debt securities, summarized by length of time that the securities had been in a continuous loss position, were as follows as of March 31, 2025 and December 31, 2024:
|  | 2025 |  | 2024
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $324.8 |  |  | $6.7 |  |  | $543.8 |  |  | $8.8 |
More than 12 months |  | 165.0 |  |  | 16.4 |  |  | 178.4 |  |  | 18.1 |
Total |  | $489.8 |  |  | $23.1 |  |  | $722.2 |  |  | $26.9 |
Investments Classified by Contractual Maturity Date [Table Text Block] | The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2025 and December 31, 2024 were as follows:
| 2025 |  | 2024
| (In Millions)
Less than 1 year | $3.7 |  |  | $4.4 |
1 year - 5 years | 221.2 |  |  | 188.2 |
5 years - 10 years | 212.0 |  |  | 259.4 |
10 years - 15 years | 97.4 |  |  | 80.9 |
15 years - 20 years | 103.6 |  |  | 106.1 |
20 years+ | 288.2 |  |  | 269.1 |
Total | $926.1 |  |  | $908.1 |
Schedule of Realized Gain (Loss) | The following table summarizes proceeds from the dispositions of available-for-sale debt securities and the related gains and losses from the sales during the three months ended March 31, 2025 and 2024:
|  | 2025 |  | 2024 |  |  |  |
|  | (In Millions)
Proceeds from disposition of securities |  | $110.0 |  |  | $48.4 |  |  |  |  |
Realized gains |  | $0.1 |  |  | $0.2 |  |  |  |  |
Realized losses |  | $1.5 |  |  | $2.9 |  |  |  |  |
Debt Securities, Available-for-Sale | The available-for-sale debt securities held as of March 31, 2025 and December 31, 2024 are summarized as follows:
|  | 2025 |  | 2024
|  | (In Millions)
Fair value |  | $926.1 |  |  | $908.1 |
Unrealized gains |  | $6.3 |  |  | $3.6 |
Unrealized losses |  | $23.1 |  |  | $26.9 |
System Energy [Member] |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] | The fair value and gross unrealized losses of available-for-sale debt securities, summarized by length of time that the securities had been in a continuous loss position, were as follows as of March 31, 2025 and December 31, 2024:
|  | 2025 |  | 2024
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
| (In Millions)
Less than 12 months |  | $154.4 |  |  | $2.9 |  |  | $275.6 |  |  | $6.8 |
More than 12 months |  | 120.6 |  |  | 17.7 |  |  | 136.8 |  |  | 20.8 |
Total |  | $275.0 |  |  | $20.6 |  |  | $412.4 |  |  | $27.6 |
Investments Classified by Contractual Maturity Date [Table Text Block] | The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2025 and December 31, 2024 were as follows:
| 2025 |  | 2024
| (In Millions)
Less than 1 year | $0.2 |  |  | $0.2 |
1 year - 5 years | 185.8 |  |  | 243.7 |
5 years - 10 years | 192.4 |  |  | 138.9 |
10 years - 15 years | 36.2 |  |  | 22.7 |
15 years - 20 years | 48.6 |  |  | 49.4 |
20 years+ | 111.7 |  |  | 104.9 |
Total | $574.9 |  |  | $559.8 |
Schedule of Realized Gain (Loss) | The following table summarizes proceeds from the dispositions of available-for-sale debt securities and the related gains and losses from the sales during the three months ended March 31, 2025 and 2024:
|  | 2025 |  | 2024 |  |  |  |
|  | (In Millions)
Proceeds from disposition of securities |  | $152.3 |  |  | $108.0 |  |  |  |  |
Realized gains |  | $0.6 |  |  | $0.2 |  |  |  |  |
Realized losses |  | $2.7 |  |  | $3.5 |  |  |  |  |
Debt Securities, Available-for-Sale | The available-for-sale debt securities held as of March 31, 2025 and December 31, 2024 are summarized as follows:
|  | 2025 |  | 2024
|  | (In Millions)
Fair value |  | $574.9 |  |  | $559.8 |
Unrealized gains |  | $4.7 |  |  | $1.9 |
Unrealized losses |  | $20.6 |  |  | $27.6 |

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