Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2023

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.

Entergy Arkansas [Member]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets (liabilities) in the following amounts to reflect their estimates of the difference between estimated incurred removal costs and estimated removal costs expected to be recovered in rates:

	December 31,
	2023	2022
	(In Millions)
Entergy Arkansas	$319.7	$267.1
Entergy Louisiana	$262.3	$418.8
Entergy Mississippi	$188.0	$159.4
Entergy New Orleans	$61.1	$56.3
Entergy Texas	$77.5	$62.9
System Energy	$102.1	$94.4

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.

Entergy Louisiana [Member]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets (liabilities) in the following amounts to reflect their estimates of the difference between estimated incurred removal costs and estimated removal costs expected to be recovered in rates:

	December 31,
	2023	2022
	(In Millions)
Entergy Arkansas	$319.7	$267.1
Entergy Louisiana	$262.3	$418.8
Entergy Mississippi	$188.0	$159.4
Entergy New Orleans	$61.1	$56.3
Entergy Texas	$77.5	$62.9
System Energy	$102.1	$94.4

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.

Entergy Mississippi [Member]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets (liabilities) in the following amounts to reflect their estimates of the difference between estimated incurred removal costs and estimated removal costs expected to be recovered in rates:

	December 31,
	2023	2022
	(In Millions)
Entergy Arkansas	$319.7	$267.1
Entergy Louisiana	$262.3	$418.8
Entergy Mississippi	$188.0	$159.4
Entergy New Orleans	$61.1	$56.3
Entergy Texas	$77.5	$62.9
System Energy	$102.1	$94.4

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.

Entergy New Orleans [Member]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets (liabilities) in the following amounts to reflect their estimates of the difference between estimated incurred removal costs and estimated removal costs expected to be recovered in rates:

	December 31,
	2023	2022
	(In Millions)
Entergy Arkansas	$319.7	$267.1
Entergy Louisiana	$262.3	$418.8
Entergy Mississippi	$188.0	$159.4
Entergy New Orleans	$61.1	$56.3
Entergy Texas	$77.5	$62.9
System Energy	$102.1	$94.4

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.

Entergy Texas [Member]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets (liabilities) in the following amounts to reflect their estimates of the difference between estimated incurred removal costs and estimated removal costs expected to be recovered in rates:

	December 31,
	2023	2022
	(In Millions)
Entergy Arkansas	$319.7	$267.1
Entergy Louisiana	$262.3	$418.8
Entergy Mississippi	$188.0	$159.4
Entergy New Orleans	$61.1	$56.3
Entergy Texas	$77.5	$62.9
System Energy	$102.1	$94.4

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.

System Energy [Member]

Schedule Of Regulatory Assets And Liabilities [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets (liabilities) in the following amounts to reflect their estimates of the difference between estimated incurred removal costs and estimated removal costs expected to be recovered in rates:

	December 31,
	2023	2022
	(In Millions)
Entergy Arkansas	$319.7	$267.1
Entergy Louisiana	$262.3	$418.8
Entergy Mississippi	$188.0	$159.4
Entergy New Orleans	$61.1	$56.3
Entergy Texas	$77.5	$62.9
System Energy	$102.1	$94.4

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2023 and 2022 by Entergy were as follows:

	Liabilities as of December 31, 2022	Accretion	Change in Cash Flow Estimate	Liabilities as of December 31, 2023
	(In Millions)
Entergy	$4,271.5	$219.4	$14.9	$4,505.8
Entergy Arkansas	$1,472.7	$87.4	$—	$1,560.1
Entergy Louisiana	$1,736.8	$88.6	$10.8	$1,836.2
Entergy Mississippi	$7.8	$0.4	$—	$8.2
Entergy New Orleans	$—	$0.5	$4.1	$4.6
Entergy Texas	$11.1	$0.6	$—	$11.7
System Energy	$1,042.5	$41.7	$—	$1,084.2

	Liabilities as of December 31, 2021	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2022
	(In Millions)
Entergy	$4,757.1	$236.0	($0.5)	($13.3)	($707.8)		$4,271.5
Utility
Entergy Arkansas	$1,390.4	$82.3	$—	$—	$—		$1,472.7
Entergy Louisiana	$1,653.2	$84.1	$2.8	($3.3)	$—		$1,736.8
Entergy Mississippi	$10.3	$0.6	$—	($3.1)	$—		$7.8
Entergy New Orleans	$4.0	$0.1	$—	($4.1)	$—		$—
Entergy Texas	$8.5	$0.5	$2.1	$—	$—		$11.1
System Energy	$1,007.6	$40.2	($5.4)	$—	$—		$1,042.5
Non-Utility Operations
Big Rock Point	$42.0	$2.0	$—	($1.2)	($42.8)	(b)	$—
Palisades	$640.4	$31.0	$—	($1.6)	($669.8)	(b)	$—
Other (a)	$0.6	$—	$—	$—	$—		$0.6

(a)    See “Coal Combustion Residuals” below for additional discussion regarding the asset retirement obligations related to coal combustion residuals management.

(b)    See Note 14 to the financial statements for discussion of the sale of the Big Rock Point Site and Palisades in June 2022.