Average coupon rate of debt securities percentage.

No definition available.

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- Definition

Average Duration of Debt Securities in Years

+ References

No definition available.

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- Definition

Average Maturity of Debt Securities, Years

+ References

No definition available.

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- Definition

Decommissioning Trust Funds.

+ References

No definition available.

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- Definition

Percentage Interest in River Bend

+ References

No definition available.

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- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563

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- Definition

This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

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- Definition

This item represents the tax effects occurring during the period which are related to the net unrealized gain (loss) resulting from changes in the fair [carrying] value during the period of available-for-sale securities. Such tax affects would have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 11
-Subparagraph (b)
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-Section 50
-Paragraph 9
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563

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- Definition

The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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- Definition

The cash inflow associated with the sale of debt securities classified as available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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Decommissioning Trust Funds (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Mar. 31, 2017	Jan. 31, 2017
Decommissioning Trust Funds [Abstract]
Deferred taxes on unrealized gains/(losses) recorded in OCI for non-regulated decommissioning trusts			$ 441.0		$ 399.0
Amortized cost of debt securities	$ 2,378.0		$ 2,378.0		2,212.0
Average coupon rate of debt securities	3.21%		3.21%
Average duration of debt securities, years			6 years 51 days
Average maturity of debt securities, years			9 years 350 days
Proceeds from the dispositions of debt securities	$ 949.0	$ 504.0	$ 1,463.0	$ 1,233.0
Gains from dispositions of debt securities, gross	61.0	10.0	70.0	20.0
Losses from dispositions of debt securities, gross	2.0	2.0	7.0	5.0
Entergy Arkansas [Member]
Decommissioning Trust Funds [Abstract]
Amortized cost of debt securities	$ 327.0		$ 327.0		310.1
Average coupon rate of debt securities	2.53%		2.53%
Average duration of debt securities, years			5 years 303 days
Average maturity of debt securities, years			6 years 318 days
Proceeds from the dispositions of debt securities	$ 131.3	45.2	$ 167.3	103.8
Gains from dispositions of debt securities, gross	11.2	0.4	11.7	1.2
Losses from dispositions of debt securities, gross	0.1	0.2	$ 0.2	0.3
Entergy Louisiana [Member]
Decommissioning Trust Funds [Abstract]
Percentage Interest in River Bend			30.00%
Amortized cost of debt securities	$ 456.1		$ 456.1		421.9
Average coupon rate of debt securities	3.79%		3.79%
Average duration of debt securities, years			5 years 292 days
Average maturity of debt securities, years			11 years 179 days
Proceeds from the dispositions of debt securities	$ 85.0	69.7	$ 125.6	123.5
Gains from dispositions of debt securities, gross	5.0	1.7	5.0	2.6
Losses from dispositions of debt securities, gross	0.1	0.0	0.3	0.1
System Energy [Member]
Decommissioning Trust Funds [Abstract]
Amortized cost of debt securities	$ 321.5		$ 321.5		$ 309.1
Average coupon rate of debt securities	2.37%		2.37%
Average duration of debt securities, years			6 years 164 days
Average maturity of debt securities, years			8 years 307 days
Proceeds from the dispositions of debt securities	$ 177.7	100.9	$ 253.5	289.4
Gains from dispositions of debt securities, gross	0.4	0.9	0.5	2.5
Losses from dispositions of debt securities, gross	0.6	$ 0.1	1.3	$ 0.4
Fitzpatrick [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value						$ 805.0	$ 793.0
Indian Point 3 [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value	758.0		758.0				$ 726.0
Indian Point 1 [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value	465.0		465.0
Indian Point 2 [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value	591.0		591.0
Palisades [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value	434.0		434.0
Pilgrim [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value	1,010.0		1,010.0
Vermont Yankee [Member]
Decommissioning Trust Funds [Abstract]
Decommissioning Fund Investments, Fair Value	$ 595.0		$ 595.0