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Decommissioning Trust Funds (Tables)
 9 Months Ended
Sep. 30, 2023
Securities Held
The available-for-sale securities held as of September 30, 2023 and December 31, 2022 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2023
Debt Securities$1,660 $1 $222 
2022
Debt Securities$1,655 $4 $201 
Available For Sale Securities Continuous Unrealized Loss Position Fair Value
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 September 30, 2023 and December 31, 2022:
September 30, 2023December 31, 2022
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$585 $30 $840 $63 
More than 12 months1,010 192 666 138 
Total$1,595 $222 $1,506 $201 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of September 30, 2023 and December 31, 2022 were as follows:
20232022
(In Millions)
Less than 1 year$80 $62 
1 year - 5 years499 520 
5 years - 10 years477 461 
10 years - 15 years108 117 
15 years - 20 years155 161 
20 years+341 334 
Total$1,660 $1,655 
Entergy Arkansas [Member]  
Securities Held The available-for-sale securities held as of September 30, 2023 and December 31, 2022 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2023
Debt Securities$470.9 $0.1 $78.1 
2022
Debt Securities$470.7 $0.2 $69.3 
Available For Sale Securities Continuous Unrealized Loss Position Fair Value
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 September 30, 2023 and December 31, 2022:
September 30, 2023December 31, 2022
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$68.8 $4.3 $197.6 $18.8 
More than 12 months391.8 73.8 260.1 50.5 
Total$460.6 $78.1 $457.7 $69.3 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of September 30, 2023 and December 31, 2022 were as follows:
 20232022
 (In Millions)
Less than 1 year$45.6 $21.2 
1 year - 5 years135.8 159.7 
5 years - 10 years189.8 191.7 
10 years - 15 years38.9 38.0 
15 years - 20 years42.2 42.6 
20 years+18.6 17.5 
Total$470.9 $470.7 
Entergy Louisiana [Member]  
Securities Held The available-for-sale securities held as of September 30, 2023 and December 31, 2022 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2023
Debt Securities$736.8 $1.3 $74.5 
2022
Debt Securities$725.1 $3.5 $67.5 
Available For Sale Securities Continuous Unrealized Loss Position Fair Value
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 September 30, 2023 and December 31, 2022:
September 30, 2023December 31, 2022
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$339.7 $14.9 $409.9 $24.6 
More than 12 months354.9 59.6 207.5 42.9 
Total$694.6 $74.5 $617.4 $67.5 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of September 30, 2023 and December 31, 2022 were as follows:
20232022
(In Millions)
Less than 1 year$31.9 $33.6 
1 year - 5 years164.6 159.1 
5 years - 10 years169.2 161.7 
10 years - 15 years64.2 67.1 
15 years - 20 years79.4 83.3 
20 years+227.5 220.3 
Total$736.8 $725.1 
System Energy [Member]  
Securities Held The available-for-sale securities held as of September 30, 2023 and December 31, 2022 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2023
Debt Securities$452.8 $0.1 $69.8 
2022
Debt Securities$459.7 $0.7 $63.7 
Available For Sale Securities Continuous Unrealized Loss Position Fair Value
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 September 30, 2023 and December 31, 2022:
September 30, 2023December 31, 2022
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$176.1 $11.0 $231.9 $19.2 
More than 12 months263.0 58.8 198.0 44.5 
Total$439.1 $69.8 $429.9 $63.7 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of September 30, 2023 and December 31, 2022 were as follows:
20232022
(In Millions)
Less than 1 year$2.7 $6.8 
1 year - 5 years198.9 201.7 
5 years - 10 years118.4 107.1 
10 years - 15 years4.7 11.7 
15 years - 20 years33.1 35.0 
20 years+95.0 97.4 
Total$452.8 $459.7