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Decommissioning Trust Funds | 6 Months Ended
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Jun. 30, 2024
Decommissioning Trust Fund [Text Block] | DECOMMISSIONING TRUST FUNDS (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, and System Energy) The NRC requires certain of the Utility operating companies and System Energy to maintain nuclear decommissioning trusts to fund the costs of decommissioning ANO 1, ANO 2, River Bend, Waterford 3, and Grand Gulf. Entergy’s nuclear decommissioning trust funds invest in equity securities, fixed-rate debt securities, and cash and cash equivalents. Entergy records decommissioning trust funds on the balance sheet at their fair value. Because of the ability of the Registrant Subsidiaries to recover decommissioning costs in rates and in accordance with the regulatory treatment for decommissioning trust funds, for unrealized gains/(losses) on investment securities, the Registrant Subsidiaries record an offsetting amount in other regulatory liabilities/assets. For the 30% interest in River Bend formerly owned by Cajun, Entergy Louisiana records an offsetting amount in other deferred credits for the unrealized trust earnings not currently expected to be needed to decommission the plant. Generally, Entergy records gains and losses on its debt and equity securities using the specific identification method to determine the cost basis of its securities. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $78 million and $366 million, respectively. The equity securities are generally held in funds that are designed to approximate or somewhat exceed the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index or the Russell 3000 Index. The debt securities are generally held in individual government and credit issuances. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $1,922 |  |  | $10 |  |  | $139 |
2023 |  |  |  |  |  |
Debt Securities |  | $1,770 |  |  | $19 |  |  | $134 |
As of June 30, 2024 and December 31, 2023, there were no deferred taxes on unrealized gains/(losses). The amortized cost of available-for-sale debt securities was $2,051 million as of June 30, 2024 and $1,885 million as of December 31, 2023. As of June 30, 2024, available-for-sale debt securities had an average coupon rate of approximately 3.63%, an average duration of approximately 6.14 years, and an average maturity of approximately 10.44 years. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $453 |  |  | $5 |  |  | $134 |  |  | $6 |
More than 12 months |  | 949 |  |  | 134 |  |  | 999 |  |  | 128 |
Total |  | $1,402 |  |  | $139 |  |  | $1,133 |  |  | $134 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $76 |  |  | $82 |
1 year - 5 years | 568 |  |  | 517 |
5 years - 10 years | 575 |  |  | 504 |
10 years - 15 years | 120 |  |  | 121 |
15 years - 20 years | 186 |  |  | 179 |
20 years+ | 397 |  |  | 367 |
Total | $1,922 |  |  | $1,770 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $161 million and $136 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $14 million and $8 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $330 million and $260 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $1 million in each period and gross losses of $20 million and $17 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Arkansas Entergy Arkansas holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.4 |  |  | $1.9 |  |  | $59.0 |
2023 |  |  |  |  |  |
Debt Securities |  | $496.9 |  |  | $2.4 |  |  | $53.6 |
The amortized cost of available-for-sale debt securities was $611.5 million as of June 30, 2024 and $548.1 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 2.92%, an average duration of approximately 5.80 years, and an average maturity of approximately 7.51 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $21.7 million and $105.7 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $70.8 |  |  | $1.1 |  |  | $22.5 |  |  | $0.4 |
More than 12 months |  | 388.7 |  |  | 57.9 |  |  | 403.4 |  |  | 53.2 |
Total |  | $459.5 |  |  | $59.0 |  |  | $425.9 |  |  | $53.6 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $43.5 |  |  | $45.3 |
1 year - 5 years | 156.3 |  |  | 132.2 |
5 years - 10 years | 234.8 |  |  | 205.7 |
10 years - 15 years | 31.7 |  |  | 39.9 |
15 years - 20 years | 59.8 |  |  | 49.6 |
20 years+ | 28.3 |  |  | 24.2 |
Total | $554.4 |  |  | $496.9 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $5.5 million and $0.9 million, respectively. During the three months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.4 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $0.1 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $17.9 million and $16.6 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2023, there were no gross gains and gross losses of $1.7 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Louisiana Entergy Louisiana holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $812.6 |  |  | $4.6 |  |  | $39.8 |
2023 |  |  |  |  |  |
Debt Securities |  | $788.1 |  |  | $11.7 |  |  | $37.4 |
The amortized cost of available-for-sale debt securities was $847.8 million as of June 30, 2024 and $813.9 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 4.03%, an average duration of approximately 6.36 years, and an average maturity of approximately 12.79 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $42.3 million and $166.6 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $275.6 |  |  | $2.7 |  |  | $69.8 |  |  | $0.9 |
More than 12 months |  | 340.4 |  |  | 37.1 |  |  | 356.1 |  |  | 36.5 |
Total |  | $616.0 |  |  | $39.8 |  |  | $425.9 |  |  | $37.4 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $27.3 |  |  | $31.4 |
1 year - 5 years | 189.2 |  |  | 181.6 |
5 years - 10 years | 186.9 |  |  | 170.0 |
10 years - 15 years | 79.8 |  |  | 70.2 |
15 years - 20 years | 84.7 |  |  | 90.2 |
20 years+ | 244.7 |  |  | 244.7 |
Total | $812.6 |  |  | $788.1 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $62.5 million and $65.2 million, respectively. During the three months ended June 30, 2024 and 2023, there were gross gains of $0.1 million in each period and gross losses of $4.8 million and $4 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $110.9 million and $132.6 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $0.2 million and $0.5 million, respectively, and gross losses of $7.7 million and $9 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. System Energy System Energy holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.6 |  |  | $3.2 |  |  | $40.2 |
2023 |  |  |  |  |  |
Debt Securities |  | $485.2 |  |  | $4.5 |  |  | $42.5 |
The amortized cost of available-for-sale debt securities was $591.6 million as of June 30, 2024 and $523.2 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 3.78%, an average duration of approximately 6.18 years, and an average maturity of approximately 10.03 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $14.3 million and $93.3 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
| (In Millions)
Less than 12 months |  | $106.8 |  |  | $1.6 |  |  | $42.1 |  |  | $4.5 |
More than 12 months |  | 219.8 |  |  | 38.6 |  |  | 239.1 |  |  | 38.0 |
Total |  | $326.6 |  |  | $40.2 |  |  | $281.2 |  |  | $42.5 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $5.4 |  |  | $5.3 |
1 year - 5 years | 222.1 |  |  | 203.4 |
5 years - 10 years | 153.5 |  |  | 128.6 |
10 years - 15 years | 8.1 |  |  | 10.7 |
15 years - 20 years | 41.0 |  |  | 38.8 |
20 years+ | 124.5 |  |  | 98.4 |
Total | $554.6 |  |  | $485.2 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $93.5 million and $69.9 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $8.4 million and $4.1 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $201.5 million and $111.2 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.2 million and gross losses of $11.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $6.3 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings.
Entergy Arkansas [Member] |
Decommissioning Trust Fund [Text Block] | DECOMMISSIONING TRUST FUNDS (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, and System Energy) The NRC requires certain of the Utility operating companies and System Energy to maintain nuclear decommissioning trusts to fund the costs of decommissioning ANO 1, ANO 2, River Bend, Waterford 3, and Grand Gulf. Entergy’s nuclear decommissioning trust funds invest in equity securities, fixed-rate debt securities, and cash and cash equivalents. Entergy records decommissioning trust funds on the balance sheet at their fair value. Because of the ability of the Registrant Subsidiaries to recover decommissioning costs in rates and in accordance with the regulatory treatment for decommissioning trust funds, for unrealized gains/(losses) on investment securities, the Registrant Subsidiaries record an offsetting amount in other regulatory liabilities/assets. For the 30% interest in River Bend formerly owned by Cajun, Entergy Louisiana records an offsetting amount in other deferred credits for the unrealized trust earnings not currently expected to be needed to decommission the plant. Generally, Entergy records gains and losses on its debt and equity securities using the specific identification method to determine the cost basis of its securities. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $78 million and $366 million, respectively. The equity securities are generally held in funds that are designed to approximate or somewhat exceed the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index or the Russell 3000 Index. The debt securities are generally held in individual government and credit issuances. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $1,922 |  |  | $10 |  |  | $139 |
2023 |  |  |  |  |  |
Debt Securities |  | $1,770 |  |  | $19 |  |  | $134 |
As of June 30, 2024 and December 31, 2023, there were no deferred taxes on unrealized gains/(losses). The amortized cost of available-for-sale debt securities was $2,051 million as of June 30, 2024 and $1,885 million as of December 31, 2023. As of June 30, 2024, available-for-sale debt securities had an average coupon rate of approximately 3.63%, an average duration of approximately 6.14 years, and an average maturity of approximately 10.44 years. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $453 |  |  | $5 |  |  | $134 |  |  | $6 |
More than 12 months |  | 949 |  |  | 134 |  |  | 999 |  |  | 128 |
Total |  | $1,402 |  |  | $139 |  |  | $1,133 |  |  | $134 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $76 |  |  | $82 |
1 year - 5 years | 568 |  |  | 517 |
5 years - 10 years | 575 |  |  | 504 |
10 years - 15 years | 120 |  |  | 121 |
15 years - 20 years | 186 |  |  | 179 |
20 years+ | 397 |  |  | 367 |
Total | $1,922 |  |  | $1,770 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $161 million and $136 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $14 million and $8 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $330 million and $260 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $1 million in each period and gross losses of $20 million and $17 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Arkansas Entergy Arkansas holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.4 |  |  | $1.9 |  |  | $59.0 |
2023 |  |  |  |  |  |
Debt Securities |  | $496.9 |  |  | $2.4 |  |  | $53.6 |
The amortized cost of available-for-sale debt securities was $611.5 million as of June 30, 2024 and $548.1 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 2.92%, an average duration of approximately 5.80 years, and an average maturity of approximately 7.51 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $21.7 million and $105.7 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $70.8 |  |  | $1.1 |  |  | $22.5 |  |  | $0.4 |
More than 12 months |  | 388.7 |  |  | 57.9 |  |  | 403.4 |  |  | 53.2 |
Total |  | $459.5 |  |  | $59.0 |  |  | $425.9 |  |  | $53.6 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $43.5 |  |  | $45.3 |
1 year - 5 years | 156.3 |  |  | 132.2 |
5 years - 10 years | 234.8 |  |  | 205.7 |
10 years - 15 years | 31.7 |  |  | 39.9 |
15 years - 20 years | 59.8 |  |  | 49.6 |
20 years+ | 28.3 |  |  | 24.2 |
Total | $554.4 |  |  | $496.9 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $5.5 million and $0.9 million, respectively. During the three months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.4 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $0.1 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $17.9 million and $16.6 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2023, there were no gross gains and gross losses of $1.7 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Louisiana Entergy Louisiana holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $812.6 |  |  | $4.6 |  |  | $39.8 |
2023 |  |  |  |  |  |
Debt Securities |  | $788.1 |  |  | $11.7 |  |  | $37.4 |
The amortized cost of available-for-sale debt securities was $847.8 million as of June 30, 2024 and $813.9 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 4.03%, an average duration of approximately 6.36 years, and an average maturity of approximately 12.79 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $42.3 million and $166.6 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $275.6 |  |  | $2.7 |  |  | $69.8 |  |  | $0.9 |
More than 12 months |  | 340.4 |  |  | 37.1 |  |  | 356.1 |  |  | 36.5 |
Total |  | $616.0 |  |  | $39.8 |  |  | $425.9 |  |  | $37.4 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $27.3 |  |  | $31.4 |
1 year - 5 years | 189.2 |  |  | 181.6 |
5 years - 10 years | 186.9 |  |  | 170.0 |
10 years - 15 years | 79.8 |  |  | 70.2 |
15 years - 20 years | 84.7 |  |  | 90.2 |
20 years+ | 244.7 |  |  | 244.7 |
Total | $812.6 |  |  | $788.1 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $62.5 million and $65.2 million, respectively. During the three months ended June 30, 2024 and 2023, there were gross gains of $0.1 million in each period and gross losses of $4.8 million and $4 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $110.9 million and $132.6 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $0.2 million and $0.5 million, respectively, and gross losses of $7.7 million and $9 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. System Energy System Energy holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.6 |  |  | $3.2 |  |  | $40.2 |
2023 |  |  |  |  |  |
Debt Securities |  | $485.2 |  |  | $4.5 |  |  | $42.5 |
The amortized cost of available-for-sale debt securities was $591.6 million as of June 30, 2024 and $523.2 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 3.78%, an average duration of approximately 6.18 years, and an average maturity of approximately 10.03 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $14.3 million and $93.3 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
| (In Millions)
Less than 12 months |  | $106.8 |  |  | $1.6 |  |  | $42.1 |  |  | $4.5 |
More than 12 months |  | 219.8 |  |  | 38.6 |  |  | 239.1 |  |  | 38.0 |
Total |  | $326.6 |  |  | $40.2 |  |  | $281.2 |  |  | $42.5 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $5.4 |  |  | $5.3 |
1 year - 5 years | 222.1 |  |  | 203.4 |
5 years - 10 years | 153.5 |  |  | 128.6 |
10 years - 15 years | 8.1 |  |  | 10.7 |
15 years - 20 years | 41.0 |  |  | 38.8 |
20 years+ | 124.5 |  |  | 98.4 |
Total | $554.6 |  |  | $485.2 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $93.5 million and $69.9 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $8.4 million and $4.1 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $201.5 million and $111.2 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.2 million and gross losses of $11.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $6.3 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings.
Entergy Louisiana [Member] |
Decommissioning Trust Fund [Text Block] | DECOMMISSIONING TRUST FUNDS (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, and System Energy) The NRC requires certain of the Utility operating companies and System Energy to maintain nuclear decommissioning trusts to fund the costs of decommissioning ANO 1, ANO 2, River Bend, Waterford 3, and Grand Gulf. Entergy’s nuclear decommissioning trust funds invest in equity securities, fixed-rate debt securities, and cash and cash equivalents. Entergy records decommissioning trust funds on the balance sheet at their fair value. Because of the ability of the Registrant Subsidiaries to recover decommissioning costs in rates and in accordance with the regulatory treatment for decommissioning trust funds, for unrealized gains/(losses) on investment securities, the Registrant Subsidiaries record an offsetting amount in other regulatory liabilities/assets. For the 30% interest in River Bend formerly owned by Cajun, Entergy Louisiana records an offsetting amount in other deferred credits for the unrealized trust earnings not currently expected to be needed to decommission the plant. Generally, Entergy records gains and losses on its debt and equity securities using the specific identification method to determine the cost basis of its securities. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $78 million and $366 million, respectively. The equity securities are generally held in funds that are designed to approximate or somewhat exceed the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index or the Russell 3000 Index. The debt securities are generally held in individual government and credit issuances. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $1,922 |  |  | $10 |  |  | $139 |
2023 |  |  |  |  |  |
Debt Securities |  | $1,770 |  |  | $19 |  |  | $134 |
As of June 30, 2024 and December 31, 2023, there were no deferred taxes on unrealized gains/(losses). The amortized cost of available-for-sale debt securities was $2,051 million as of June 30, 2024 and $1,885 million as of December 31, 2023. As of June 30, 2024, available-for-sale debt securities had an average coupon rate of approximately 3.63%, an average duration of approximately 6.14 years, and an average maturity of approximately 10.44 years. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $453 |  |  | $5 |  |  | $134 |  |  | $6 |
More than 12 months |  | 949 |  |  | 134 |  |  | 999 |  |  | 128 |
Total |  | $1,402 |  |  | $139 |  |  | $1,133 |  |  | $134 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $76 |  |  | $82 |
1 year - 5 years | 568 |  |  | 517 |
5 years - 10 years | 575 |  |  | 504 |
10 years - 15 years | 120 |  |  | 121 |
15 years - 20 years | 186 |  |  | 179 |
20 years+ | 397 |  |  | 367 |
Total | $1,922 |  |  | $1,770 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $161 million and $136 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $14 million and $8 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $330 million and $260 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $1 million in each period and gross losses of $20 million and $17 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Arkansas Entergy Arkansas holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.4 |  |  | $1.9 |  |  | $59.0 |
2023 |  |  |  |  |  |
Debt Securities |  | $496.9 |  |  | $2.4 |  |  | $53.6 |
The amortized cost of available-for-sale debt securities was $611.5 million as of June 30, 2024 and $548.1 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 2.92%, an average duration of approximately 5.80 years, and an average maturity of approximately 7.51 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $21.7 million and $105.7 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $70.8 |  |  | $1.1 |  |  | $22.5 |  |  | $0.4 |
More than 12 months |  | 388.7 |  |  | 57.9 |  |  | 403.4 |  |  | 53.2 |
Total |  | $459.5 |  |  | $59.0 |  |  | $425.9 |  |  | $53.6 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $43.5 |  |  | $45.3 |
1 year - 5 years | 156.3 |  |  | 132.2 |
5 years - 10 years | 234.8 |  |  | 205.7 |
10 years - 15 years | 31.7 |  |  | 39.9 |
15 years - 20 years | 59.8 |  |  | 49.6 |
20 years+ | 28.3 |  |  | 24.2 |
Total | $554.4 |  |  | $496.9 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $5.5 million and $0.9 million, respectively. During the three months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.4 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $0.1 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $17.9 million and $16.6 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2023, there were no gross gains and gross losses of $1.7 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Louisiana Entergy Louisiana holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $812.6 |  |  | $4.6 |  |  | $39.8 |
2023 |  |  |  |  |  |
Debt Securities |  | $788.1 |  |  | $11.7 |  |  | $37.4 |
The amortized cost of available-for-sale debt securities was $847.8 million as of June 30, 2024 and $813.9 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 4.03%, an average duration of approximately 6.36 years, and an average maturity of approximately 12.79 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $42.3 million and $166.6 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $275.6 |  |  | $2.7 |  |  | $69.8 |  |  | $0.9 |
More than 12 months |  | 340.4 |  |  | 37.1 |  |  | 356.1 |  |  | 36.5 |
Total |  | $616.0 |  |  | $39.8 |  |  | $425.9 |  |  | $37.4 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $27.3 |  |  | $31.4 |
1 year - 5 years | 189.2 |  |  | 181.6 |
5 years - 10 years | 186.9 |  |  | 170.0 |
10 years - 15 years | 79.8 |  |  | 70.2 |
15 years - 20 years | 84.7 |  |  | 90.2 |
20 years+ | 244.7 |  |  | 244.7 |
Total | $812.6 |  |  | $788.1 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $62.5 million and $65.2 million, respectively. During the three months ended June 30, 2024 and 2023, there were gross gains of $0.1 million in each period and gross losses of $4.8 million and $4 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $110.9 million and $132.6 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $0.2 million and $0.5 million, respectively, and gross losses of $7.7 million and $9 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. System Energy System Energy holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.6 |  |  | $3.2 |  |  | $40.2 |
2023 |  |  |  |  |  |
Debt Securities |  | $485.2 |  |  | $4.5 |  |  | $42.5 |
The amortized cost of available-for-sale debt securities was $591.6 million as of June 30, 2024 and $523.2 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 3.78%, an average duration of approximately 6.18 years, and an average maturity of approximately 10.03 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $14.3 million and $93.3 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
| (In Millions)
Less than 12 months |  | $106.8 |  |  | $1.6 |  |  | $42.1 |  |  | $4.5 |
More than 12 months |  | 219.8 |  |  | 38.6 |  |  | 239.1 |  |  | 38.0 |
Total |  | $326.6 |  |  | $40.2 |  |  | $281.2 |  |  | $42.5 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $5.4 |  |  | $5.3 |
1 year - 5 years | 222.1 |  |  | 203.4 |
5 years - 10 years | 153.5 |  |  | 128.6 |
10 years - 15 years | 8.1 |  |  | 10.7 |
15 years - 20 years | 41.0 |  |  | 38.8 |
20 years+ | 124.5 |  |  | 98.4 |
Total | $554.6 |  |  | $485.2 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $93.5 million and $69.9 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $8.4 million and $4.1 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $201.5 million and $111.2 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.2 million and gross losses of $11.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $6.3 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings.
System Energy [Member] |
Decommissioning Trust Fund [Text Block] | DECOMMISSIONING TRUST FUNDS (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, and System Energy) The NRC requires certain of the Utility operating companies and System Energy to maintain nuclear decommissioning trusts to fund the costs of decommissioning ANO 1, ANO 2, River Bend, Waterford 3, and Grand Gulf. Entergy’s nuclear decommissioning trust funds invest in equity securities, fixed-rate debt securities, and cash and cash equivalents. Entergy records decommissioning trust funds on the balance sheet at their fair value. Because of the ability of the Registrant Subsidiaries to recover decommissioning costs in rates and in accordance with the regulatory treatment for decommissioning trust funds, for unrealized gains/(losses) on investment securities, the Registrant Subsidiaries record an offsetting amount in other regulatory liabilities/assets. For the 30% interest in River Bend formerly owned by Cajun, Entergy Louisiana records an offsetting amount in other deferred credits for the unrealized trust earnings not currently expected to be needed to decommission the plant. Generally, Entergy records gains and losses on its debt and equity securities using the specific identification method to determine the cost basis of its securities. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $78 million and $366 million, respectively. The equity securities are generally held in funds that are designed to approximate or somewhat exceed the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index or the Russell 3000 Index. The debt securities are generally held in individual government and credit issuances. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $1,922 |  |  | $10 |  |  | $139 |
2023 |  |  |  |  |  |
Debt Securities |  | $1,770 |  |  | $19 |  |  | $134 |
As of June 30, 2024 and December 31, 2023, there were no deferred taxes on unrealized gains/(losses). The amortized cost of available-for-sale debt securities was $2,051 million as of June 30, 2024 and $1,885 million as of December 31, 2023. As of June 30, 2024, available-for-sale debt securities had an average coupon rate of approximately 3.63%, an average duration of approximately 6.14 years, and an average maturity of approximately 10.44 years. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $453 |  |  | $5 |  |  | $134 |  |  | $6 |
More than 12 months |  | 949 |  |  | 134 |  |  | 999 |  |  | 128 |
Total |  | $1,402 |  |  | $139 |  |  | $1,133 |  |  | $134 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $76 |  |  | $82 |
1 year - 5 years | 568 |  |  | 517 |
5 years - 10 years | 575 |  |  | 504 |
10 years - 15 years | 120 |  |  | 121 |
15 years - 20 years | 186 |  |  | 179 |
20 years+ | 397 |  |  | 367 |
Total | $1,922 |  |  | $1,770 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $161 million and $136 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $14 million and $8 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $330 million and $260 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $1 million in each period and gross losses of $20 million and $17 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Arkansas Entergy Arkansas holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.4 |  |  | $1.9 |  |  | $59.0 |
2023 |  |  |  |  |  |
Debt Securities |  | $496.9 |  |  | $2.4 |  |  | $53.6 |
The amortized cost of available-for-sale debt securities was $611.5 million as of June 30, 2024 and $548.1 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 2.92%, an average duration of approximately 5.80 years, and an average maturity of approximately 7.51 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $21.7 million and $105.7 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $70.8 |  |  | $1.1 |  |  | $22.5 |  |  | $0.4 |
More than 12 months |  | 388.7 |  |  | 57.9 |  |  | 403.4 |  |  | 53.2 |
Total |  | $459.5 |  |  | $59.0 |  |  | $425.9 |  |  | $53.6 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $43.5 |  |  | $45.3 |
1 year - 5 years | 156.3 |  |  | 132.2 |
5 years - 10 years | 234.8 |  |  | 205.7 |
10 years - 15 years | 31.7 |  |  | 39.9 |
15 years - 20 years | 59.8 |  |  | 49.6 |
20 years+ | 28.3 |  |  | 24.2 |
Total | $554.4 |  |  | $496.9 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $5.5 million and $0.9 million, respectively. During the three months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.4 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $0.1 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $17.9 million and $16.6 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.1 million and gross losses of $0.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2023, there were no gross gains and gross losses of $1.7 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. Entergy Louisiana Entergy Louisiana holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $812.6 |  |  | $4.6 |  |  | $39.8 |
2023 |  |  |  |  |  |
Debt Securities |  | $788.1 |  |  | $11.7 |  |  | $37.4 |
The amortized cost of available-for-sale debt securities was $847.8 million as of June 30, 2024 and $813.9 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 4.03%, an average duration of approximately 6.36 years, and an average maturity of approximately 12.79 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $42.3 million and $166.6 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
|  | (In Millions)
Less than 12 months |  | $275.6 |  |  | $2.7 |  |  | $69.8 |  |  | $0.9 |
More than 12 months |  | 340.4 |  |  | 37.1 |  |  | 356.1 |  |  | 36.5 |
Total |  | $616.0 |  |  | $39.8 |  |  | $425.9 |  |  | $37.4 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $27.3 |  |  | $31.4 |
1 year - 5 years | 189.2 |  |  | 181.6 |
5 years - 10 years | 186.9 |  |  | 170.0 |
10 years - 15 years | 79.8 |  |  | 70.2 |
15 years - 20 years | 84.7 |  |  | 90.2 |
20 years+ | 244.7 |  |  | 244.7 |
Total | $812.6 |  |  | $788.1 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $62.5 million and $65.2 million, respectively. During the three months ended June 30, 2024 and 2023, there were gross gains of $0.1 million in each period and gross losses of $4.8 million and $4 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale securities amounted to $110.9 million and $132.6 million, respectively. During the six months ended June 30, 2024 and 2023, there were gross gains of $0.2 million and $0.5 million, respectively, and gross losses of $7.7 million and $9 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. System Energy System Energy holds equity securities and available-for-sale debt securities in nuclear decommissioning trust accounts. The available-for-sale securities held as of June 30, 2024 and December 31, 2023 are summarized as follows:
|  | Fair Value |  | Total Unrealized Gains |  | Total Unrealized Losses
|  | (In Millions)
2024 |  |  |  |  |  |
Debt Securities |  | $554.6 |  |  | $3.2 |  |  | $40.2 |
2023 |  |  |  |  |  |
Debt Securities |  | $485.2 |  |  | $4.5 |  |  | $42.5 |
The amortized cost of available-for-sale debt securities was $591.6 million as of June 30, 2024 and $523.2 million as of December 31, 2023. As of June 30, 2024, the available-for-sale debt securities had an average coupon rate of approximately 3.78%, an average duration of approximately 6.18 years, and an average maturity of approximately 10.03 years. The unrealized gains/(losses) recognized during the three and six months ended June 30, 2024 on equity securities still held as of June 30, 2024 were $14.3 million and $93.3 million, respectively. The equity securities are generally held in funds that are designed to approximate the return of the Standard & Poor’s 500 Index. A relatively small percentage of the equity securities are held in funds intended to replicate the return of the Wilshire 4500 Index. 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 June 30, 2024 and December 31, 2023:
|  | June 30, 2024 |  | December 31, 2023
|  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
| (In Millions)
Less than 12 months |  | $106.8 |  |  | $1.6 |  |  | $42.1 |  |  | $4.5 |
More than 12 months |  | 219.8 |  |  | 38.6 |  |  | 239.1 |  |  | 38.0 |
Total |  | $326.6 |  |  | $40.2 |  |  | $281.2 |  |  | $42.5 |
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of June 30, 2024 and December 31, 2023 were as follows:
| 2024 |  | 2023
| (In Millions)
Less than 1 year | $5.4 |  |  | $5.3 |
1 year - 5 years | 222.1 |  |  | 203.4 |
5 years - 10 years | 153.5 |  |  | 128.6 |
10 years - 15 years | 8.1 |  |  | 10.7 |
15 years - 20 years | 41.0 |  |  | 38.8 |
20 years+ | 124.5 |  |  | 98.4 |
Total | $554.6 |  |  | $485.2 |
During the three months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $93.5 million and $69.9 million, respectively. During the three months ended June 30, 2024 and 2023, there were no gross gains and gross losses of $8.4 million and $4.1 million, respectively, related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the six months ended June 30, 2024 and 2023, proceeds from the dispositions of available-for-sale debt securities amounted to $201.5 million and $111.2 million, respectively. During the six months ended June 30, 2024, there were gross gains of $0.2 million and gross losses of $11.9 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings. During the three months ended June 30, 2023, there were no gross gains and gross losses of $6.3 million related to available-for-sale debt securities reclassified out of other regulatory liabilities/assets into earnings.

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