Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2024

Schedule of Regulatory Assets [Table Text Block]

Entergy

	2024	2023
	(In Millions)
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)	$1,387.6	$1,655.5
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear units or shutdown of non-nuclear power plants and solar facilities (Note 9) (a)	1,358.7	1,285.0
Removal costs (Note 9)	1,107.6	1,010.7
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators and Note 5 - Securitization Bonds)	547.3	536.9
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)	227.1	250.9
Retail rate deferrals - recovered through formula rates or rate riders as rates are redetermined by retail regulators	195.1	248.6
Retired electric and gas meters - recovered through retail rates as determined by retail regulators (Note 2 - Retail Rate Proceedings)	135.7	153.8
Deferred COVID-19 costs - recovered through retail rates as determined by retail regulators (Note 2 - Retail Rate Proceedings)	104.0	118.0
Unamortized loss on reacquired debt - recovered over term of debt	57.9	63.1
Advanced metering system surcharge for residential customers - recovered through December 2029	39.7	20.2
Formula rate plan historical year rate adjustment (Note 2 - Retail Rate Proceedings) (b)	15.5	—
Pension & postretirement benefits expense deferral - recovered through retail rates (Note 2 - Retail Rate Proceedings and Note 11 - Entergy Texas Reserve)	15.0	32.7
Rate case depreciation relate back deferral - recovered over a six-month period beginning January 2024 (Note 2 - Retail Rate Proceedings)	—	27.6
Opportunity sales - (Note 2 - Entergy Arkansas Opportunity Sales Proceeding) (b)	—	131.8
Other	99.7	134.6
Entergy Total (c)	$5,290.9	$5,669.4

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

Entergy Arkansas [Member]

Schedule of Regulatory Assets [Table Text Block]

Entergy Arkansas

	2024	2023
	(In Millions)
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear units or shutdown of non-nuclear power plants and solar facilities (Note 9) (a)	$693.0	$639.1
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)	433.3	536.6
Removal costs (Note 9)	337.9	319.7
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)	75.8	84.1
Deferred COVID-19 costs - recovered over a 10-year period through December 2033	35.1	39.0
Retired electric meters - recovered over a 15-year period through March 2034	32.8	36.3
Storm damage costs - recovered through retail rates	29.8	33.1
Unamortized loss on reacquired debt - recovered over term of debt	18.6	19.9
Formula rate plan historical year rate adjustment (Note 2 - Retail Rate Proceedings) (b)	15.5	—
Retail rate deferrals - recovered through rate riders as rates are redetermined annually (b)	13.6	24.9
ANO Fukushima and Flood Barrier costs - recovered through retail rates through February 2026 (b)	2.1	3.8
Opportunity sales - (Note 2 - Entergy Arkansas Opportunity Sales Proceeding) (b)	—	131.8
Other	12.6	17.1
Entergy Arkansas Total	$1,700.1	$1,885.4

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

Entergy Louisiana [Member]

Schedule of Regulatory Assets [Table Text Block]

Entergy Louisiana

	2024	2023
	(In Millions)
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear units or shutdown of non-nuclear power plants (Note 9) (a)	$421.5	$408.7
Pension & postretirement costs (Note 11 - Qualified Pension Plans and Non-Qualified Pension Plans) (a)	367.7	412.0
Removal costs (Note 9)	323.2	262.3
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators)	226.6	202.6
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)	111.4	123.0
Retired electric and gas meters - recovered over a 22-year period through July 2041	78.5	83.2
Deferred COVID-19 costs - recovery period to be determined (Note 2 - Retail Rate Proceedings) (a)	47.8	47.8
Unamortized loss on reacquired debt - recovered over term of debt	21.7	23.4
Other	48.5	85.9
Entergy Louisiana Total (c)	$1,646.9	$1,648.9

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

Entergy Mississippi [Member]

Schedule of Regulatory Assets [Table Text Block]

Entergy Mississippi

	2024	2023
	(In Millions)
Removal costs (Note 9)	$184.8	$188.0
Retail rate deferrals - recovered through formula rates or rate riders as rates are redetermined annually	162.5	192.8
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)	112.1	127.6
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)	29.1	32.0
Asset retirement obligation - recovery dependent upon timing of shutdown of non-nuclear power plants and solar facility (Note 9) (a)	9.4	6.8
Unamortized loss on reacquired debt - recovered over term of debt	9.1	10.0
Attorney General litigation costs - recovered over a six-year period through March 2026 (b)	6.0	10.9
Other	12.8	11.0
Entergy Mississippi Total	$525.8	$579.1

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

Entergy New Orleans [Member]

Schedule of Regulatory Assets [Table Text Block]

Entergy New Orleans

	2024	2023
	(In Millions)
Removal costs (Note 9)	$62.5	$61.1
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)	22.9	41.4
Retired electric and gas meters - recovered over a 12-year period through July 2031 (b)	13.5	15.5
Gas cross-boring costs - recovered through formula rates as rates are redetermined by retail regulators	11.9	10.9
Qualified pension settlement cost deferral - recovered through June 2047 (Note 11 - Qualified Pension Settlement Cost)	10.8	11.8
Deferred COVID-19 costs - recovered over a five-year period through August 2028 (b)	10.2	13.0
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators and Note 5 - Entergy New Orleans Securitization Bonds - Hurricane Isaac)	4.0	3.9
Unamortized loss on reacquired debt - recovered over term of debt	0.5	0.8
Other	20.7	24.0
Entergy New Orleans Total (c)	$157.0	$182.4

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

Entergy Texas [Member]

Schedule of Regulatory Assets [Table Text Block]

Entergy Texas

	2024	2023
	(In Millions)
Storm damage costs, including hurricane costs - recovered through securitization and retail rates (Note 2 - Storm Cost Recovery Filings with Retail Regulators and Note 5 - Entergy Texas Securitization Bonds - Hurricane Laura, Hurricane Delta, and Winter Storm Uri)	$286.5	$297.3
Removal costs (Note 9)	102.3	77.5
Pension & postretirement costs (Note 11 - Qualified Pension Plans, Other Postretirement Benefits, and Non-Qualified Pension Plans) (a)	62.9	85.6
Advanced metering system surcharge for residential customers - recovered through December 2029	39.7	20.2
Pension & postretirement benefits expense deferral - recovered through retail rates (Note 2 - Retail Rate Proceedings and Note 11 - Entergy Texas Reserve)	15.0	32.7
Retired electric meters - recovered through retail rates (Note 2 - Retail Rate Proceedings)	10.9	18.8
Neches and Sabine costs - recovered over a 10-year period through September 2028	9.2	11.6
Unamortized loss on reacquired debt - recovered over term of debt	7.6	8.3
Rate case depreciation relate back deferral - recovered over a six-month period beginning January 2024 (Note 2 - Retail Rate Proceedings)	—	27.6
Other	15.6	17.0
Entergy Texas Total	$549.7	$596.6

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

System Energy [Member]

Schedule of Regulatory Assets [Table Text Block]

System Energy

	2024	2023
	(In Millions)
Asset retirement obligation - recovery dependent upon timing of decommissioning of nuclear unit (Note 9) (b)	$224.8	$222.0
Pension & postretirement costs (Note 11 - Qualified Pension Plans and Other Postretirement Benefits) (a)	104.4	121.6
Removal costs - recovered through depreciation rates (Note 9)	96.9	102.1
Unamortized loss on reacquired debt - recovered over term of debt	0.4	0.7
System Energy Total	$426.5	$446.4

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2024 and 2023 for Entergy and the Registrant Subsidiaries were as follows:

	Entergy	Entergy Arkansas	Entergy Louisiana	Entergy Mississippi	Entergy New Orleans	Entergy Texas	System Energy
	(In Millions)
Liabilities as of December 31, 2022	$4,271.5	$1,472.7	$1,736.8	$7.8	$—	$11.1	$1,042.5
Accretion	219.4	87.4	88.6	0.4	0.5	0.6	41.7
Change in cash flow estimate	14.9	—	10.8	—	4.1	—	—
Liabilities as of December 31, 2023	4,505.8	1,560.1	1,836.2	8.2	4.6	11.7	1,084.2
Liabilities incurred (a)	41.1	17.7	19.4	4.0	—	—	—
Accretion	233.8	93.6	94.4	1.1	0.3	0.8	43.5
Change in cash flow estimate	(67.3)	20.2	(107.1)	11.8	—	5.2	—
Liabilities as of December 31, 2024	$4,713.4	$1,691.6	$1,842.9	$25.1	$4.9	$17.7	$1,127.7

(a)See “Other” below for additional discussion regarding the asset retirement obligations established at Entergy Arkansas, Entergy Louisiana, and Entergy Mississippi.

Removal Costs [Member] | Entergy Arkansas [Member]

Schedule of Regulatory Assets [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets 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,
	2024	2023
	(In Millions)
Entergy Arkansas	$337.9	$319.7
Entergy Louisiana	$323.2	$262.3
Entergy Mississippi	$184.8	$188.0
Entergy New Orleans	$62.5	$61.1
Entergy Texas	$102.3	$77.5
System Energy	$96.9	$102.1

Removal Costs [Member] | Entergy Louisiana [Member]

Schedule of Regulatory Assets [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets 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,
	2024	2023
	(In Millions)
Entergy Arkansas	$337.9	$319.7
Entergy Louisiana	$323.2	$262.3
Entergy Mississippi	$184.8	$188.0
Entergy New Orleans	$62.5	$61.1
Entergy Texas	$102.3	$77.5
System Energy	$96.9	$102.1

Removal Costs [Member] | Entergy Mississippi [Member]

Schedule of Regulatory Assets [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets 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,
	2024	2023
	(In Millions)
Entergy Arkansas	$337.9	$319.7
Entergy Louisiana	$323.2	$262.3
Entergy Mississippi	$184.8	$188.0
Entergy New Orleans	$62.5	$61.1
Entergy Texas	$102.3	$77.5
System Energy	$96.9	$102.1

Removal Costs [Member] | Entergy New Orleans [Member]

Schedule of Regulatory Assets [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets 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,
	2024	2023
	(In Millions)
Entergy Arkansas	$337.9	$319.7
Entergy Louisiana	$323.2	$262.3
Entergy Mississippi	$184.8	$188.0
Entergy New Orleans	$62.5	$61.1
Entergy Texas	$102.3	$77.5
System Energy	$96.9	$102.1

Removal Costs [Member] | Entergy Texas [Member]

Schedule of Regulatory Assets [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets 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,
	2024	2023
	(In Millions)
Entergy Arkansas	$337.9	$319.7
Entergy Louisiana	$323.2	$262.3
Entergy Mississippi	$184.8	$188.0
Entergy New Orleans	$62.5	$61.1
Entergy Texas	$102.3	$77.5
System Energy	$96.9	$102.1

Removal Costs [Member] | System Energy [Member]

Schedule of Regulatory Assets [Table Text Block]

In accordance with regulatory accounting principles, the Registrant Subsidiaries have recorded regulatory assets 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,
	2024	2023
	(In Millions)
Entergy Arkansas	$337.9	$319.7
Entergy Louisiana	$323.2	$262.3
Entergy Mississippi	$184.8	$188.0
Entergy New Orleans	$62.5	$61.1
Entergy Texas	$102.3	$77.5
System Energy	$96.9	$102.1