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Risk Management And Fair Values (Tables)
12 Months Ended
Dec. 31, 2023
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 December 31, 2023 and 2022 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.
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)
(In Millions)
2023
Assets:   
Financial transmission rightsPrepayments and other$21$—$21
    
Liabilities:   
Natural gas swaps and optionsOther current liabilities$11 $— $11
2022
Assets:   
Natural gas swaps and optionsPrepayments and other$13$—$13
Natural gas swaps and optionsOther deferred debits and other assets$3$—$3
Financial transmission rightsPrepayments and other$21($2)$19
Liabilities:   
Natural gas swaps and optionsOther current liabilities$25$—$25

(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 cash collateral in the amount of $8 million posted as of December 31, 2022. Also excludes letters of credit in the amount of $2 million posted as of December 31, 2023 and $3 million posted as of December 31, 2022.
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 years ended December 31, 2023, 2022, and 2021 are as follows:
InstrumentIncome Statement locationAmount of gain (loss) recorded in the income statement
  (In Millions)
2023  
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale(a)($54)
Financial transmission rightsPurchased power expense(b)$124
   
2022  
Natural gas swaps and optionFuel, fuel-related expenses, and gas purchased for resale(a)$74
Financial transmission rightsPurchased power expense(b)$176
   
2021  
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale(a)$32
Financial transmission rightsPurchased power expense(b)$179
Electricity swaps and options (c)Other operating revenues($2)

(a)Due to regulatory treatment, the natural gas swaps and options 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 and options 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.
(c)There were no gains (losses) recognized in accumulated other comprehensive income from electricity swaps and options prior to the expiration of the non-utility operations business’ portfolio of derivative instruments in April 2021.
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 December 31, 2023 and December 31, 2022.  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.
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$61 $— $— $61 
Decommissioning trust funds (a):
Equity securities24 — — 24 
Debt securities611 1,159 — 1,770 
Common trusts (b)3,070 
Securitization recovery trust account— — 
Storm reserve escrow accounts323 — — 323 
Financial transmission rights— — 21 21 
$1,027 $1,159 $21 $5,277 
Liabilities:
Gas hedge contracts$11 $— $— $11 
2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$109 $— $— $109 
Decommissioning trust funds (a):
Equity securities24 — — 24 
Debt securities534 1,122 — 1,656 
Common trusts (b)2,442 
Securitization recovery trust account13 — — 13 
Storm reserve escrow accounts402 — — 402 
Gas hedge contracts13 — 16 
Financial transmission rights— — 19 19 
$1,095 $1,125 $19 $4,681 
Liabilities:
Gas hedge contracts$25 $— $— $25 

(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 16 to the financial statements 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 Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the years ended December 31, 2023, 2022, and 2021:
 202320222021
Financial transmission rightsFinancial transmission rightsPower ContractsFinancial transmission rights
 
Balance as of January 1,$19 $4 $38 $9 
Total gains (losses) for the period
Included in earnings— — (2)— 
Included in other comprehensive income— — — 
Included as a regulatory liability/asset84 175 — 162 
Issuances of financial transmission rights42 16 — 12 
Settlements(124)(176)(38)(179)
Balance as of December 31,$21 $19 $— $4 
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 December 31, 2023 and 2022 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.
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
  (In Millions) 
2023   
Assets:   
Financial transmission rightsPrepayments and other$6.0$—$6.0Entergy Arkansas
Financial transmission rightsPrepayments and other$9.8$—$9.8Entergy Louisiana
Financial transmission rightsPrepayments and other$1.4$—$1.4Entergy Mississippi
Financial transmission rightsPrepayments and other$1.1$—$1.1Entergy New Orleans
Financial transmission rightsPrepayments and other$2.7($0.3)$2.4Entergy Texas
Liabilities:
Natural gas swaps and optionsOther current liabilities$0.4$—$0.4Entergy Louisiana
Natural gas swapsOther current liabilities$10.1$—$10.1Entergy Mississippi
Natural gas swapsOther current liabilities$0.6$—$0.6Entergy New Orleans
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
(In Millions)
2022  
Assets:   
Natural gas swaps and optionsPrepayments and other$13.1$—$13.1Entergy Louisiana
Natural gas swaps and optionsOther deferred debits and other assets$3.4$—$3.4Entergy Louisiana
Financial transmission rightsPrepayments and other$10.3$—$10.3Entergy Arkansas
Financial transmission rightsPrepayments and other$7.7($0.4)$7.3Entergy Louisiana
Financial transmission rightsPrepayments and other$0.6$—$0.6Entergy Mississippi
Financial transmission rightsPrepayments and other$0.8$—$0.8Entergy New Orleans
Financial transmission rightsPrepayments and other$1.2($1.1)$0.1Entergy Texas
Liabilities:
Natural gas swapsOther current liabilities$24.0$—$24.0Entergy Mississippi
Natural gas swapsOther current liabilities$1.5$—$1.5Entergy New Orleans

(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)As of December 31, 2023, letters of credit posted with MISO covered financial transmission rights exposure of $1.2 million for Entergy Arkansas, $0.5 million for Entergy Louisiana, $0.3 million for Entergy Mississippi, and $0.1 million for Entergy Texas. As of December 31, 2022, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Mississippi, $0.2 million for Entergy New Orleans, and $2.4 million for Entergy Texas.
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 years ended December 31, 2023, 2022, and 2021 are as follows:
InstrumentIncome Statement LocationAmount of gain (loss) recorded in the income statementRegistrant
  (In Millions) 
2023   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale($8.4)(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($42.9)(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($3.0)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$25.8(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$60.4(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$13.7(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$6.4(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$17.3(b)Entergy Texas
2022   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$21.4(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$53.6(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($1.2)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$106.5(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$48.5(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$10.4(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$3.7(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$6.3(b)Entergy Texas
2021   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$12.6(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$19.8(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($0.1)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$42.6(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$31.6(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$11.3(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$4.3(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$85.9(b)Entergy Texas

(a)Due to regulatory treatment, the natural gas swaps and options 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 and options 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 Arkansas
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$3.1 $— $— $3.1 
Decommissioning trust funds (a):
Equity securities6.4 — — 6.4 
Debt securities129.9 367.0 — 496.9 
Common trusts (b)910.7 
Financial transmission rights— — 6.0 6.0 
$139.4 $367.0 $6.0 $1,423.1 

2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$3.4 $— $— $3.4 
Decommissioning trust funds (a):
Equity securities4.5 — — 4.5 
Debt securities126.8 343.9 — 470.7 
Common trusts (b)724.7 
Financial transmission rights— — 10.3 10.3 
$134.7 $343.9 $10.3 $1,213.6 
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2023.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2023$10.3 $7.3 $0.6 $0.8 $0.1 
Issuances of financial transmission rights20.6 18.1 1.3 1.4 0.2 
Gains (losses) included as a regulatory liability/asset0.9 44.8 13.2 5.3 19.4 
Settlements(25.8)(60.4)(13.7)(6.4)(17.3)
Balance as of December 31, 2023$6.0 $9.8 $1.4 $1.1 $2.4 

The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2022.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2022$2.3 $0.6 $0.3 $0.1 $0.8 
Issuances of financial transmission rights5.4 5.3 0.8 0.8 3.9 
Gains (losses) included as a regulatory liability/asset109.1 49.9 9.9 3.6 1.7 
Settlements(106.5)(48.5)(10.4)(3.7)(6.3)
Balance as of December 31, 2022$10.3 $7.3 $0.6 $0.8 $0.1 
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 December 31, 2023 and 2022 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.
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
  (In Millions) 
2023   
Assets:   
Financial transmission rightsPrepayments and other$6.0$—$6.0Entergy Arkansas
Financial transmission rightsPrepayments and other$9.8$—$9.8Entergy Louisiana
Financial transmission rightsPrepayments and other$1.4$—$1.4Entergy Mississippi
Financial transmission rightsPrepayments and other$1.1$—$1.1Entergy New Orleans
Financial transmission rightsPrepayments and other$2.7($0.3)$2.4Entergy Texas
Liabilities:
Natural gas swaps and optionsOther current liabilities$0.4$—$0.4Entergy Louisiana
Natural gas swapsOther current liabilities$10.1$—$10.1Entergy Mississippi
Natural gas swapsOther current liabilities$0.6$—$0.6Entergy New Orleans
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
(In Millions)
2022  
Assets:   
Natural gas swaps and optionsPrepayments and other$13.1$—$13.1Entergy Louisiana
Natural gas swaps and optionsOther deferred debits and other assets$3.4$—$3.4Entergy Louisiana
Financial transmission rightsPrepayments and other$10.3$—$10.3Entergy Arkansas
Financial transmission rightsPrepayments and other$7.7($0.4)$7.3Entergy Louisiana
Financial transmission rightsPrepayments and other$0.6$—$0.6Entergy Mississippi
Financial transmission rightsPrepayments and other$0.8$—$0.8Entergy New Orleans
Financial transmission rightsPrepayments and other$1.2($1.1)$0.1Entergy Texas
Liabilities:
Natural gas swapsOther current liabilities$24.0$—$24.0Entergy Mississippi
Natural gas swapsOther current liabilities$1.5$—$1.5Entergy New Orleans

(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)As of December 31, 2023, letters of credit posted with MISO covered financial transmission rights exposure of $1.2 million for Entergy Arkansas, $0.5 million for Entergy Louisiana, $0.3 million for Entergy Mississippi, and $0.1 million for Entergy Texas. As of December 31, 2022, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Mississippi, $0.2 million for Entergy New Orleans, and $2.4 million for Entergy Texas.
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 years ended December 31, 2023, 2022, and 2021 are as follows:
InstrumentIncome Statement LocationAmount of gain (loss) recorded in the income statementRegistrant
  (In Millions) 
2023   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale($8.4)(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($42.9)(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($3.0)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$25.8(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$60.4(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$13.7(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$6.4(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$17.3(b)Entergy Texas
2022   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$21.4(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$53.6(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($1.2)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$106.5(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$48.5(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$10.4(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$3.7(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$6.3(b)Entergy Texas
2021   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$12.6(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$19.8(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($0.1)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$42.6(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$31.6(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$11.3(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$4.3(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$85.9(b)Entergy Texas

(a)Due to regulatory treatment, the natural gas swaps and options 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 and options 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
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$0.5 $— $— $0.5 
Decommissioning trust funds (a):
Equity securities14.6 — — 14.6 
Debt securities271.7 516.4 — 788.1 
Common trusts (b)1,304.7 
Storm reserve escrow account243.8 — — 243.8 
Financial transmission rights— — 9.8 9.8 
$530.6 $516.4 $9.8 $2,361.5 
Liabilities:
Gas hedge contracts$0.4 $— $— $0.4 

2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$6.3 $— $— $6.3 
Decommissioning trust funds (a):
Equity securities16.8 — — 16.8 
Debt securities209.4 515.7 — 725.1 
Common trusts (b)1,037.2 
Storm reserve escrow account293.4 — — 293.4 
Gas hedge contracts13.1 3.4 — 16.5 
Financial transmission rights— — 7.3 7.3 
$539.0 $519.1 $7.3 $2,102.6 
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2023.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2023$10.3 $7.3 $0.6 $0.8 $0.1 
Issuances of financial transmission rights20.6 18.1 1.3 1.4 0.2 
Gains (losses) included as a regulatory liability/asset0.9 44.8 13.2 5.3 19.4 
Settlements(25.8)(60.4)(13.7)(6.4)(17.3)
Balance as of December 31, 2023$6.0 $9.8 $1.4 $1.1 $2.4 

The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2022.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2022$2.3 $0.6 $0.3 $0.1 $0.8 
Issuances of financial transmission rights5.4 5.3 0.8 0.8 3.9 
Gains (losses) included as a regulatory liability/asset109.1 49.9 9.9 3.6 1.7 
Settlements(106.5)(48.5)(10.4)(3.7)(6.3)
Balance as of December 31, 2022$10.3 $7.3 $0.6 $0.8 $0.1 
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 December 31, 2023 and 2022 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.
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
  (In Millions) 
2023   
Assets:   
Financial transmission rightsPrepayments and other$6.0$—$6.0Entergy Arkansas
Financial transmission rightsPrepayments and other$9.8$—$9.8Entergy Louisiana
Financial transmission rightsPrepayments and other$1.4$—$1.4Entergy Mississippi
Financial transmission rightsPrepayments and other$1.1$—$1.1Entergy New Orleans
Financial transmission rightsPrepayments and other$2.7($0.3)$2.4Entergy Texas
Liabilities:
Natural gas swaps and optionsOther current liabilities$0.4$—$0.4Entergy Louisiana
Natural gas swapsOther current liabilities$10.1$—$10.1Entergy Mississippi
Natural gas swapsOther current liabilities$0.6$—$0.6Entergy New Orleans
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
(In Millions)
2022  
Assets:   
Natural gas swaps and optionsPrepayments and other$13.1$—$13.1Entergy Louisiana
Natural gas swaps and optionsOther deferred debits and other assets$3.4$—$3.4Entergy Louisiana
Financial transmission rightsPrepayments and other$10.3$—$10.3Entergy Arkansas
Financial transmission rightsPrepayments and other$7.7($0.4)$7.3Entergy Louisiana
Financial transmission rightsPrepayments and other$0.6$—$0.6Entergy Mississippi
Financial transmission rightsPrepayments and other$0.8$—$0.8Entergy New Orleans
Financial transmission rightsPrepayments and other$1.2($1.1)$0.1Entergy Texas
Liabilities:
Natural gas swapsOther current liabilities$24.0$—$24.0Entergy Mississippi
Natural gas swapsOther current liabilities$1.5$—$1.5Entergy New Orleans

(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)As of December 31, 2023, letters of credit posted with MISO covered financial transmission rights exposure of $1.2 million for Entergy Arkansas, $0.5 million for Entergy Louisiana, $0.3 million for Entergy Mississippi, and $0.1 million for Entergy Texas. As of December 31, 2022, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Mississippi, $0.2 million for Entergy New Orleans, and $2.4 million for Entergy Texas.
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 years ended December 31, 2023, 2022, and 2021 are as follows:
InstrumentIncome Statement LocationAmount of gain (loss) recorded in the income statementRegistrant
  (In Millions) 
2023   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale($8.4)(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($42.9)(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($3.0)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$25.8(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$60.4(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$13.7(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$6.4(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$17.3(b)Entergy Texas
2022   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$21.4(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$53.6(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($1.2)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$106.5(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$48.5(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$10.4(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$3.7(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$6.3(b)Entergy Texas
2021   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$12.6(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$19.8(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($0.1)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$42.6(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$31.6(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$11.3(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$4.3(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$85.9(b)Entergy Texas

(a)Due to regulatory treatment, the natural gas swaps and options 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 and options 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
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$6.6 $— $— $6.6 
Storm reserve escrow account0.7 — — 0.7 
Financial transmission rights— — 1.4 1.4 
$7.3 $— $1.4 $8.7 
Liabilities:
Gas hedge contracts$10.1 $— $— $10.1 
2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$17.0 $— $— $17.0 
Storm reserve escrow account33.5 — — 33.5 
Financial transmission rights— — 0.6 0.6 
$50.5 $— $0.6 $51.1 
Liabilities:
Gas hedge contracts$24.0 $— $— $24.0 
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2023.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2023$10.3 $7.3 $0.6 $0.8 $0.1 
Issuances of financial transmission rights20.6 18.1 1.3 1.4 0.2 
Gains (losses) included as a regulatory liability/asset0.9 44.8 13.2 5.3 19.4 
Settlements(25.8)(60.4)(13.7)(6.4)(17.3)
Balance as of December 31, 2023$6.0 $9.8 $1.4 $1.1 $2.4 

The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2022.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2022$2.3 $0.6 $0.3 $0.1 $0.8 
Issuances of financial transmission rights5.4 5.3 0.8 0.8 3.9 
Gains (losses) included as a regulatory liability/asset109.1 49.9 9.9 3.6 1.7 
Settlements(106.5)(48.5)(10.4)(3.7)(6.3)
Balance as of December 31, 2022$10.3 $7.3 $0.6 $0.8 $0.1 
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 December 31, 2023 and 2022 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.
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
  (In Millions) 
2023   
Assets:   
Financial transmission rightsPrepayments and other$6.0$—$6.0Entergy Arkansas
Financial transmission rightsPrepayments and other$9.8$—$9.8Entergy Louisiana
Financial transmission rightsPrepayments and other$1.4$—$1.4Entergy Mississippi
Financial transmission rightsPrepayments and other$1.1$—$1.1Entergy New Orleans
Financial transmission rightsPrepayments and other$2.7($0.3)$2.4Entergy Texas
Liabilities:
Natural gas swaps and optionsOther current liabilities$0.4$—$0.4Entergy Louisiana
Natural gas swapsOther current liabilities$10.1$—$10.1Entergy Mississippi
Natural gas swapsOther current liabilities$0.6$—$0.6Entergy New Orleans
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
(In Millions)
2022  
Assets:   
Natural gas swaps and optionsPrepayments and other$13.1$—$13.1Entergy Louisiana
Natural gas swaps and optionsOther deferred debits and other assets$3.4$—$3.4Entergy Louisiana
Financial transmission rightsPrepayments and other$10.3$—$10.3Entergy Arkansas
Financial transmission rightsPrepayments and other$7.7($0.4)$7.3Entergy Louisiana
Financial transmission rightsPrepayments and other$0.6$—$0.6Entergy Mississippi
Financial transmission rightsPrepayments and other$0.8$—$0.8Entergy New Orleans
Financial transmission rightsPrepayments and other$1.2($1.1)$0.1Entergy Texas
Liabilities:
Natural gas swapsOther current liabilities$24.0$—$24.0Entergy Mississippi
Natural gas swapsOther current liabilities$1.5$—$1.5Entergy New Orleans

(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)As of December 31, 2023, letters of credit posted with MISO covered financial transmission rights exposure of $1.2 million for Entergy Arkansas, $0.5 million for Entergy Louisiana, $0.3 million for Entergy Mississippi, and $0.1 million for Entergy Texas. As of December 31, 2022, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Mississippi, $0.2 million for Entergy New Orleans, and $2.4 million for Entergy Texas.
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 years ended December 31, 2023, 2022, and 2021 are as follows:
InstrumentIncome Statement LocationAmount of gain (loss) recorded in the income statementRegistrant
  (In Millions) 
2023   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale($8.4)(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($42.9)(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($3.0)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$25.8(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$60.4(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$13.7(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$6.4(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$17.3(b)Entergy Texas
2022   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$21.4(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$53.6(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($1.2)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$106.5(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$48.5(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$10.4(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$3.7(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$6.3(b)Entergy Texas
2021   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$12.6(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$19.8(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($0.1)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$42.6(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$31.6(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$11.3(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$4.3(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$85.9(b)Entergy Texas

(a)Due to regulatory treatment, the natural gas swaps and options 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 and options 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
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Securitization recovery trust account$2.4 $— $— $2.4 
Storm reserve escrow account78.7 — — 78.7 
Financial transmission rights— — 1.1 1.1 
$81.1 $— $1.1 $82.2 
Liabilities:
Gas hedge contracts$0.6 $— $— $0.6 

2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$4.4 $— $— $4.4 
Securitization recovery trust account2.2 — — 2.2 
Storm reserve escrow account75.0 — — 75.0 
Financial transmission rights— — 0.8 0.8 
$81.6 $— $0.8 $82.4 
Liabilities:
Gas hedge contracts$1.5 $— $— $1.5 
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2023.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2023$10.3 $7.3 $0.6 $0.8 $0.1 
Issuances of financial transmission rights20.6 18.1 1.3 1.4 0.2 
Gains (losses) included as a regulatory liability/asset0.9 44.8 13.2 5.3 19.4 
Settlements(25.8)(60.4)(13.7)(6.4)(17.3)
Balance as of December 31, 2023$6.0 $9.8 $1.4 $1.1 $2.4 

The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2022.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2022$2.3 $0.6 $0.3 $0.1 $0.8 
Issuances of financial transmission rights5.4 5.3 0.8 0.8 3.9 
Gains (losses) included as a regulatory liability/asset109.1 49.9 9.9 3.6 1.7 
Settlements(106.5)(48.5)(10.4)(3.7)(6.3)
Balance as of December 31, 2022$10.3 $7.3 $0.6 $0.8 $0.1 
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 December 31, 2023 and 2022 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.
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
  (In Millions) 
2023   
Assets:   
Financial transmission rightsPrepayments and other$6.0$—$6.0Entergy Arkansas
Financial transmission rightsPrepayments and other$9.8$—$9.8Entergy Louisiana
Financial transmission rightsPrepayments and other$1.4$—$1.4Entergy Mississippi
Financial transmission rightsPrepayments and other$1.1$—$1.1Entergy New Orleans
Financial transmission rightsPrepayments and other$2.7($0.3)$2.4Entergy Texas
Liabilities:
Natural gas swaps and optionsOther current liabilities$0.4$—$0.4Entergy Louisiana
Natural gas swapsOther current liabilities$10.1$—$10.1Entergy Mississippi
Natural gas swapsOther current liabilities$0.6$—$0.6Entergy New Orleans
InstrumentBalance Sheet LocationGross Fair Value (a)Offsetting Position (b)Net Fair Value (c) (d)Registrant
(In Millions)
2022  
Assets:   
Natural gas swaps and optionsPrepayments and other$13.1$—$13.1Entergy Louisiana
Natural gas swaps and optionsOther deferred debits and other assets$3.4$—$3.4Entergy Louisiana
Financial transmission rightsPrepayments and other$10.3$—$10.3Entergy Arkansas
Financial transmission rightsPrepayments and other$7.7($0.4)$7.3Entergy Louisiana
Financial transmission rightsPrepayments and other$0.6$—$0.6Entergy Mississippi
Financial transmission rightsPrepayments and other$0.8$—$0.8Entergy New Orleans
Financial transmission rightsPrepayments and other$1.2($1.1)$0.1Entergy Texas
Liabilities:
Natural gas swapsOther current liabilities$24.0$—$24.0Entergy Mississippi
Natural gas swapsOther current liabilities$1.5$—$1.5Entergy New Orleans

(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)As of December 31, 2023, letters of credit posted with MISO covered financial transmission rights exposure of $1.2 million for Entergy Arkansas, $0.5 million for Entergy Louisiana, $0.3 million for Entergy Mississippi, and $0.1 million for Entergy Texas. As of December 31, 2022, letters of credit posted with MISO covered financial transmission rights exposure of $0.2 million for Entergy Mississippi, $0.2 million for Entergy New Orleans, and $2.4 million for Entergy Texas.
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 years ended December 31, 2023, 2022, and 2021 are as follows:
InstrumentIncome Statement LocationAmount of gain (loss) recorded in the income statementRegistrant
  (In Millions) 
2023   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale($8.4)(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($42.9)(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($3.0)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$25.8(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$60.4(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$13.7(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$6.4(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$17.3(b)Entergy Texas
2022   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$21.4(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$53.6(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($1.2)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$106.5(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$48.5(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$10.4(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$3.7(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$6.3(b)Entergy Texas
2021   
Natural gas swaps and optionsFuel, fuel-related expenses, and gas purchased for resale$12.6(a)Entergy Louisiana
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale$19.8(a)Entergy Mississippi
Natural gas swapsFuel, fuel-related expenses, and gas purchased for resale($0.1)(a)Entergy New Orleans
Financial transmission rightsPurchased power expense$42.6(b)Entergy Arkansas
Financial transmission rightsPurchased power expense$31.6(b)Entergy Louisiana
Financial transmission rightsPurchased power expense$11.3(b)Entergy Mississippi
Financial transmission rightsPurchased power expense$4.3(b)Entergy New Orleans
Financial transmission rightsPurchased power expense$85.9(b)Entergy Texas

(a)Due to regulatory treatment, the natural gas swaps and options 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 and options 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
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$20.5 $— $— $20.5 
Securitization recovery trust account5.2 — — 5.2 
Financial transmission rights— — 2.4 2.4 
$25.7 $— $2.4 $28.1 
2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$3.0 $— $— $3.0 
Securitization recovery trust account10.9 — — 10.9 
Financial transmission rights— — 0.1 0.1 
$13.9 $— $0.1 $14.0 
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2023.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2023$10.3 $7.3 $0.6 $0.8 $0.1 
Issuances of financial transmission rights20.6 18.1 1.3 1.4 0.2 
Gains (losses) included as a regulatory liability/asset0.9 44.8 13.2 5.3 19.4 
Settlements(25.8)(60.4)(13.7)(6.4)(17.3)
Balance as of December 31, 2023$6.0 $9.8 $1.4 $1.1 $2.4 

The following table sets forth a reconciliation of changes in the net assets for the fair value of derivatives classified as Level 3 in the fair value hierarchy for the year ended December 31, 2022.
Entergy ArkansasEntergy LouisianaEntergy MississippiEntergy New OrleansEntergy Texas
 (In Millions)
Balance as of January 1, 2022$2.3 $0.6 $0.3 $0.1 $0.8 
Issuances of financial transmission rights5.4 5.3 0.8 0.8 3.9 
Gains (losses) included as a regulatory liability/asset109.1 49.9 9.9 3.6 1.7 
Settlements(106.5)(48.5)(10.4)(3.7)(6.3)
Balance as of December 31, 2022$10.3 $7.3 $0.6 $0.8 $0.1 
System Energy [Member]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
System Energy
2023Level 1Level 2Level 3Total
(In Millions)
Assets:
Decommissioning trust funds (a):
Equity securities$2.7 $— $— $2.7 
Debt securities209.5 275.7 — 485.2 
Common trusts (b)854.4 
$212.2 $275.7 $— $1,342.3 

2022Level 1Level 2Level 3Total
(In Millions)
Assets:
Temporary cash investments$2.9 $— $— $2.9 
Decommissioning trust funds (a):
Equity securities2.8 — — 2.8 
Debt securities197.5 262.2 — 459.7 
Common trusts (b)680.4 
$203.2 $262.2 $— $1,145.8