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Decommissioning Trust Funds (Tables)
 3 Months Ended
Mar. 31, 2022
Securities Held
The available-for-sale securities held as of March 31, 2022 and December 31, 2021 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2022
Debt Securities$2,070 $15 $99 
2021
Debt Securities$2,177 $65 $12 
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 March 31, 2022 and December 31, 2021:
March 31, 2022December 31, 2021
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$1,419 $83 $770 $8 
More than 12 months119 16 99 4 
Total$1,538 $99 $869 $12 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2022 and December 31, 2021 were as follows:
20222021
(In Millions)
Less than 1 year$76 $— 
1 year - 5 years692 473 
5 years - 10 years600 655 
10 years - 15 years150 389 
15 years - 20 years158 130 
20 years+394 530 
Total$2,070 $2,177 
Entergy Arkansas [Member]  
Securities Held The available-for-sale securities held as of March 31, 2022 and December 31, 2021 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2022
Debt Securities$509.3 $1.4 $28.3 
2021
Debt Securities$526.3 $11.4 $4.7 
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 March 31, 2022 and December 31, 2021:
March 31, 2022December 31, 2021
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$332.9 $21.3 $183.8 $2.9 
More than 12 months55.8 7.0 39.5 1.8 
Total$388.7 $28.3 $223.3 $4.7 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2022 and December 31, 2021 were as follows:
 20222021
 (In Millions)
Less than 1 year$33.8 $— 
1 year - 5 years153.6 91.7 
5 years - 10 years220.8 217.4 
10 years - 15 years47.9 146.0 
15 years - 20 years27.3 35.7 
20 years+25.9 35.5 
Total$509.3 $526.3 
Entergy Louisiana [Member]  
Securities Held The available-for-sale securities held as of March 31, 2022 and December 31, 2021 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2022
Debt Securities$747.5 $9.7 $30.2 
2021
Debt Securities$794.2 $31.3 $3.3 
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 March 31, 2022 and December 31, 2021:
March 31, 2022December 31, 2021
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$427.4 $25.1 $206.9 $1.4 
More than 12 months41.2 5.1 42.9 1.9 
Total$468.6 $30.2 $249.8 $3.3 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2022 and December 31, 2021 were as follows:
20222021
(In Millions)
Less than 1 year$29.2 $— 
1 year - 5 years193.9 157.8 
5 years - 10 years170.0 173.0 
10 years - 15 years68.5 123.0 
15 years - 20 years82.9 80.2 
20 years+203.0 260.2 
Total$747.5 $794.2 
System Energy [Member]  
Securities Held The available-for-sale securities held as of March 31, 2022 and December 31, 2021 are summarized as follows:
Fair
Value		Total
Unrealized
Gains		Total
Unrealized
Losses
(In Millions)
2022
Debt Securities$499.6 $1.9 $27.6 
2021
Debt Securities$524.5 $11.8 $2.9 
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 March 31, 2022 and December 31, 2021:
March 31, 2022December 31, 2021
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
(In Millions)
Less than 12 months$418.4 $25.5 $276.6 $2.3 
More than 12 months13.3 2.1 11.3 0.6 
Total$431.7 $27.6 $287.9 $2.9 
Fair Value Of Debt Securities By Contractual Maturities
The fair value of available-for-sale debt securities, summarized by contractual maturities, as of March 31, 2022 and December 31, 2021 were as follows:
20222021
(In Millions)
Less than 1 year$6.9 $— 
1 year - 5 years217.3 156.8 
5 years - 10 years136.1 161.8 
10 years - 15 years9.5 58.6 
15 years - 20 years31.1 1.9 
20 years+98.7 145.4 
Total$499.6 $524.5