Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2020

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.

Entergy Arkansas [Member]

Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates

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,
	2020	2019
	(In Millions)
Entergy Arkansas	$212.6	$168.9
Entergy Louisiana	$302.5	($2.4)
Entergy Mississippi	$107.3	$80.8
Entergy New Orleans	$63.2	$52.9
Entergy Texas	$115.3	$42.5
System Energy	$92.9	$75.9

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.

Entergy Louisiana [Member]

Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates

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,
	2020	2019
	(In Millions)
Entergy Arkansas	$212.6	$168.9
Entergy Louisiana	$302.5	($2.4)
Entergy Mississippi	$107.3	$80.8
Entergy New Orleans	$63.2	$52.9
Entergy Texas	$115.3	$42.5
System Energy	$92.9	$75.9

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.

Entergy Mississippi [Member]

Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates

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,
	2020	2019
	(In Millions)
Entergy Arkansas	$212.6	$168.9
Entergy Louisiana	$302.5	($2.4)
Entergy Mississippi	$107.3	$80.8
Entergy New Orleans	$63.2	$52.9
Entergy Texas	$115.3	$42.5
System Energy	$92.9	$75.9

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.

Entergy New Orleans [Member]

Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates

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,
	2020	2019
	(In Millions)
Entergy Arkansas	$212.6	$168.9
Entergy Louisiana	$302.5	($2.4)
Entergy Mississippi	$107.3	$80.8
Entergy New Orleans	$63.2	$52.9
Entergy Texas	$115.3	$42.5
System Energy	$92.9	$75.9

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.

Entergy Texas [Member]

Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates

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,
	2020	2019
	(In Millions)
Entergy Arkansas	$212.6	$168.9
Entergy Louisiana	$302.5	($2.4)
Entergy Mississippi	$107.3	$80.8
Entergy New Orleans	$63.2	$52.9
Entergy Texas	$115.3	$42.5
System Energy	$92.9	$75.9

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.

System Energy [Member]

Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates

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,
	2020	2019
	(In Millions)
Entergy Arkansas	$212.6	$168.9
Entergy Louisiana	$302.5	($2.4)
Entergy Mississippi	$107.3	$80.8
Entergy New Orleans	$63.2	$52.9
Entergy Texas	$115.3	$42.5
System Energy	$92.9	$75.9

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2020 and 2019 by Entergy were as follows:

	Liabilities as of December 31, 2019	Accretion	Spending	Liabilities as of December 31, 2020
	(In Millions)
Entergy	$6,159.2	$394.6	($84.3)	$6,469.5
Utility
Entergy Arkansas	1,242.6	73.3	(1.7)	1,314.2
Entergy Louisiana	1,497.3	76.0	—	1,573.3
Entergy Mississippi	9.7	0.6	(0.5)	9.8
Entergy New Orleans	3.5	0.3	—	3.8
Entergy Texas	7.6	0.5	—	8.1
System Energy	931.7	37.2	—	968.9
Entergy Wholesale Commodities
Big Rock Point	40.3	3.3	(2.5)	41.1
Indian Point 1	238.6	20.4	(12.4)	246.6
Indian Point 2	829.0	69.4	(58.6)	839.8
Indian Point 3	808.4	67.4	(6.4)	869.4
Palisades	549.8	46.4	(2.1)	594.1
Other (a)	0.5	—	—	0.5

	Liabilities as of December 31, 2018	Accretion	Change in Cash Flow Estimate	Spending	Dispositions		Liabilities as of December 31, 2019
	(In Millions)
Entergy	$6,923.4	$414.0	$273.7	($45.6)	($1,406.3)		$6,159.2
Utility
Entergy Arkansas	1,048.4	68.0	126.2	—	—		1,242.6
Entergy Louisiana	1,280.3	69.5	147.5	—	—		1,497.3
Entergy Mississippi	9.2	0.5	—	—	—		9.7
Entergy New Orleans	3.3	0.2	—	—	—		3.5
Entergy Texas	7.2	0.4	—	—	—		7.6
System Energy	896.0	35.7	—	—	—		931.7
Entergy Wholesale Commodities
Big Rock Point	39.7	3.2	—	(2.6)	—		40.3
Indian Point 1	227.9	19.5	—	(8.8)	—		238.6
Indian Point 2	768.0	65.5	—	(4.5)	—		829.0
Indian Point 3	750.6	62.5	—	(4.7)	—		808.4
Palisades	508.0	42.9	—	(1.1)	—		549.8
Pilgrim	816.5	44.1	—	(23.9)	(836.7)	(b)	—
Vermont Yankee	567.9	1.7	—	—	(569.6)	(b)	—
Other (a)	0.4	0.1	—	—	—		0.5

(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 Pilgrim plant to Holtec International in August 2019 and the sale of the Vermont Yankee plant to NorthStar in January 2019.