Decommissioning Trust Funds (Tables)

12 Months Ended

Dec. 31, 2016

Securities Held

The securities held as of December 31, 2016 and 2015 are summarized as follows:

	2016						2015
	Fair Value		Total Unrealized Gains		Total Unrealized Losses		Fair Value		Total Unrealized Gains		Total Unrealized Losses
	(In Millions)
Equity Securities		$3,511		$1,673		$1		$3,195		$1,396		$2
Debt Securities	2,213		34		27		2,155		41		17
Total		$5,724		$1,707		$28		$5,350		$1,437		$19

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2016 and 2015:

	2016								2015
	Equity Securities				Debt Securities				Equity Securities				Debt Securities
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In Millions)
Less than 12 months		$23		$1		$1,169		$26		$54		$2		$1,031		$15
More than 12 months	1		—		20		1		1		—		61		2
Total		$24		$1		$1,189		$27		$55		$2		$1,092		$17

Fair Value Of Debt Securities By Contractual Maturities

The fair value of debt securities, summarized by contractual maturities, as of December 31, 2016 and 2015 are as follows:

	2016		2015
	(In Millions)
less than 1 year		$125		$77
1 year - 5 years	763		857
5 years - 10 years	719		704
10 years - 15 years	109		124
15 years - 20 years	73		50
20 years+	424		343
Total		$2,213		$2,155

Entergy Arkansas [Member]

Securities Held

The securities held as of December 31, 2016 and 2015 are summarized as follows:

	2016						2015
	Fair Value		Total Unrealized Gains		Total Unrealized Losses		Fair Value		Total Unrealized Gains		Total Unrealized Losses
	(In Millions)
Equity Securities		$525.4		$281.5		$—		$467.4		$234.4		$0.2
Debt Securities	309.3		3.4		4.2		303.9		4.1		2.2
Total		$834.7		$284.9		$4.2		$771.3		$238.5		$2.4

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2016 and 2015:

	2016								2015
	Equity Securities				Debt Securities				Equity Securities				Debt Securities
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In Millions)
Less than 12 months		$—		$—		$146.7		$4.2		$7.8		$0.2		$111.4		$1.7
More than 12 months	—		—		—		—		—		—		18.5		0.5
Total		$—		$—		$146.7		$4.2		$7.8		$0.2		$129.9		$2.2

Fair Value Of Debt Securities By Contractual Maturities

The fair value of debt securities, summarized by contractual maturities, as of December 31, 2016 and 2015 are as follows:

	2016		2015
	(In Millions)
less than 1 year		$16.7		$1.8
1 year - 5 years	106.2		145.2
5 years - 10 years	161.2		138.5
10 years - 15 years	7.7		2.4
15 years - 20 years	1.0		2.0
20 years+	16.5		14.0
Total		$309.3		$303.9

Entergy Louisiana [Member]

Securities Held

The securities held as of December 31, 2016 and 2015 are summarized as follows:

	2016						2015
	Fair Value		Total Unrealized Gains		Total Unrealized Losses		Fair Value		Total Unrealized Gains		Total Unrealized Losses
	(In Millions)
Equity Securities		$715.9		$346.6		$—		$632.4		$283.7		$0.2
Debt Securities	424.8		8.0		5.0		409.9		13.2		2.4
Total		$1,140.7		$354.6		$5.0		$1,042.3		$296.9		$2.6

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2016 and 2015:

	2016								2015
	Equity Securities				Debt Securities				Equity Securities				Debt Securities
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In Millions)
Less than 12 months		$—		$—		$198.8		$4.8		$9.4		$0.2		$124.0		$2.0
More than 12 months	—		—		4.8		0.2		—		—		7.4		0.4
Total		$—		$—		$203.6		$5.0		$9.4		$0.2		$131.4		$2.4

Fair Value Of Debt Securities By Contractual Maturities

The fair value of debt securities, summarized by contractual maturities, as of December 31, 2016 and 2015 are as follows:

	2016		2015
	(In Millions)
less than 1 year		$31.4		$27.1
1 year - 5 years	99.1		124.0
5 years - 10 years	122.8		114.3
10 years - 15 years	41.4		39.3
15 years - 20 years	30.9		26.5
20 years+	99.2		78.7
Total		$424.8		$409.9

System Energy [Member]

Securities Held

The securities held as of December 31, 2016 and 2015 are summarized as follows:

	2016						2015
	Fair Value		Total Unrealized Gains		Total Unrealized Losses		Fair Value		Total Unrealized Gains		Total Unrealized Losses
	(In Millions)
Equity Securities		$473.9		$221.9		$0.1		$423.7		$179.2		$0.3
Debt Securities	306.6		2.0		4.5		277.8		2.2		2.3
Total		$780.5		$223.9		$4.6		$701.5		$181.4		$2.6

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2016 and 2015:

	2016								2015
	Equity Securities				Debt Securities				Equity Securities				Debt Securities
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In Millions)
Less than 12 months		$—		$—		$220.9		$4.4		$8.3		$0.2		$200.4		$2.2
More than 12 months	—		0.1		0.8		0.1		0.9		0.1		5.0		0.1
Total		$—		$0.1		$221.7		$4.5		$9.2		$0.3		$205.4		$2.3

Fair Value Of Debt Securities By Contractual Maturities

The fair value of debt securities, summarized by contractual maturities, as of December 31, 2016 and 2015 are as follows:

	2016		2015
	(In Millions)
less than 1 year		$6.6		$2.0
1 year - 5 years	188.2		181.2
5 years - 10 years	78.5		63.0
10 years - 15 years	1.3		4.4
15 years - 20 years	7.8		1.6
20 years+	24.2		25.6
Total		$306.6		$277.8