Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2015

Regulatory Assets [Line Items]

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

Fair Values Of Decommissioning Trust Funds And Related Asset Retirement Obligation Regulatory Assets

Entergy maintains decommissioning trust funds that are committed to meeting its obligations for the costs of decommissioning the nuclear power plants.  The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2015 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$771.3		$280.3
River Bend		$651.7		($26.8	)
Waterford 3		$390.6		$158.5
Grand Gulf		$701.5		$108.6
Entergy Wholesale Commodities		$2,834.9		$—

The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2014 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$769.9		$247.6
River Bend		$637.7		($25.5	)
Waterford 3		$383.6		$145.5
Grand Gulf		$679.8		$80.4
Entergy Wholesale Commodities		$2,899.9		$—

Entergy Arkansas [Member]

Regulatory Assets [Line Items]

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 recovered in rates:

	December 31,
	2015	2014
	(In Millions)
Entergy Arkansas	$85.7	$59.0
Entergy Louisiana	($68.3)	($82.6)
Entergy Mississippi	$77.5	$76.3
Entergy New Orleans	$29.4	$35.2
Entergy Texas	$25.8	$18.9
System Energy	$54.8	$55.7

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

Fair Values Of Decommissioning Trust Funds And Related Asset Retirement Obligation Regulatory Assets

Entergy maintains decommissioning trust funds that are committed to meeting its obligations for the costs of decommissioning the nuclear power plants.  The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2015 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$771.3		$280.3
River Bend		$651.7		($26.8	)
Waterford 3		$390.6		$158.5
Grand Gulf		$701.5		$108.6
Entergy Wholesale Commodities		$2,834.9		$—

The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2014 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$769.9		$247.6
River Bend		$637.7		($25.5	)
Waterford 3		$383.6		$145.5
Grand Gulf		$679.8		$80.4
Entergy Wholesale Commodities		$2,899.9		$—

Entergy Louisiana [Member]

Regulatory Assets [Line Items]

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 recovered in rates:

	December 31,
	2015	2014
	(In Millions)
Entergy Arkansas	$85.7	$59.0
Entergy Louisiana	($68.3)	($82.6)
Entergy Mississippi	$77.5	$76.3
Entergy New Orleans	$29.4	$35.2
Entergy Texas	$25.8	$18.9
System Energy	$54.8	$55.7

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

Fair Values Of Decommissioning Trust Funds And Related Asset Retirement Obligation Regulatory Assets

Entergy maintains decommissioning trust funds that are committed to meeting its obligations for the costs of decommissioning the nuclear power plants.  The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2015 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$771.3		$280.3
River Bend		$651.7		($26.8	)
Waterford 3		$390.6		$158.5
Grand Gulf		$701.5		$108.6
Entergy Wholesale Commodities		$2,834.9		$—

The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2014 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$769.9		$247.6
River Bend		$637.7		($25.5	)
Waterford 3		$383.6		$145.5
Grand Gulf		$679.8		$80.4
Entergy Wholesale Commodities		$2,899.9		$—

Entergy Mississippi [Member]

Regulatory Assets [Line Items]

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 recovered in rates:

	December 31,
	2015	2014
	(In Millions)
Entergy Arkansas	$85.7	$59.0
Entergy Louisiana	($68.3)	($82.6)
Entergy Mississippi	$77.5	$76.3
Entergy New Orleans	$29.4	$35.2
Entergy Texas	$25.8	$18.9
System Energy	$54.8	$55.7

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

Entergy New Orleans [Member]

Regulatory Assets [Line Items]

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 recovered in rates:

	December 31,
	2015	2014
	(In Millions)
Entergy Arkansas	$85.7	$59.0
Entergy Louisiana	($68.3)	($82.6)
Entergy Mississippi	$77.5	$76.3
Entergy New Orleans	$29.4	$35.2
Entergy Texas	$25.8	$18.9
System Energy	$54.8	$55.7

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

Entergy Texas [Member]

Regulatory Assets [Line Items]

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 recovered in rates:

	December 31,
	2015	2014
	(In Millions)
Entergy Arkansas	$85.7	$59.0
Entergy Louisiana	($68.3)	($82.6)
Entergy Mississippi	$77.5	$76.3
Entergy New Orleans	$29.4	$35.2
Entergy Texas	$25.8	$18.9
System Energy	$54.8	$55.7

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

System Energy [Member]

Regulatory Assets [Line Items]

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 recovered in rates:

	December 31,
	2015	2014
	(In Millions)
Entergy Arkansas	$85.7	$59.0
Entergy Louisiana	($68.3)	($82.6)
Entergy Mississippi	$77.5	$76.3
Entergy New Orleans	$29.4	$35.2
Entergy Texas	$25.8	$18.9
System Energy	$54.8	$55.7

Cumulative decommissioning and retirement cost liabilities and expenses

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2015 by Entergy were as follows:

	Liabilities as of December 31, 2014	Liabilities Incurred (a)		Accretion		Change in Cash Flow Estimate			Spending			Liabilities as of December 31, 2015
	(In Millions)
Utility:
Entergy Arkansas	$818.4		$3.5		$50.4		$—			$—			$872.3
Entergy Louisiana	$950.3		$1.9		$51.0		$24.7			$—			$1,027.9
Entergy Mississippi	$6.8		$1.1		$0.4		$—			$—			$8.3
Entergy New Orleans	$2.5		$—		$0.2		$—			$—			$2.7
Entergy Texas	$4.6		$1.4		$0.3		($0.2	)		$—			$6.1
System Energy	$757.9		$—		$48.0		($2.5	)		$—			$803.4
Entergy Wholesale Commodities	$1,917.8		$—		$153.8		$99.6			($101.7	)		$2,069.5

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

The cumulative decommissioning and retirement cost liabilities and expenses recorded in 2014 by Entergy were as follows:

	Liabilities as of December 31, 2013		Accretion		Change in Cash Flow Estimate		Spending			Liabilities as  of December 31, 2014
	(In Millions)
Utility:
Entergy Arkansas		$723.8		$47.0		$47.6		$—			$818.4
Entergy Louisiana		$882.2		$48.1		$20.0		$—			$950.3
Entergy Mississippi		$6.4		$0.4		$—		$—			$6.8
Entergy New Orleans		$2.3		$0.2		$—		$—			$2.5
Entergy Texas		$4.3		$0.3		$—		$—			$4.6
System Energy		$616.2		$41.8		$99.9		$—			$757.9
Entergy Wholesale Commodities		$1,698.2		$139.7		$101.6		($21.7	)		$1,917.8

Fair Values Of Decommissioning Trust Funds And Related Asset Retirement Obligation Regulatory Assets

Entergy maintains decommissioning trust funds that are committed to meeting its obligations for the costs of decommissioning the nuclear power plants.  The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2015 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$771.3		$280.3
River Bend		$651.7		($26.8	)
Waterford 3		$390.6		$158.5
Grand Gulf		$701.5		$108.6
Entergy Wholesale Commodities		$2,834.9		$—

The fair values of the decommissioning trust funds and the related asset retirement obligation regulatory assets (liabilities) of Entergy as of December 31, 2014 are as follows:

	Decommissioning Trust Fair Values		Regulatory Asset (Liability)
	(In Millions)
Utility:
ANO 1 and ANO 2		$769.9		$247.6
River Bend		$637.7		($25.5	)
Waterford 3		$383.6		$145.5
Grand Gulf		$679.8		$80.4
Entergy Wholesale Commodities		$2,899.9		$—