Income Taxes (Schedule Of Statutory Income Tax Rate To Income Before Taxes) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Net income (loss) attributable to Entergy Corporation		$ 99,573	$ (723,027)	$ 148,843	$ 298,050	$ 120,127	$ 230,037	$ 189,383	$ 401,174	$ (176,562)		$ 940,721		$ 711,902
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										19,828		19,536		18,670
Consolidated net income (loss)		104,849	(718,233)	153,722	302,929	125,006	234,916	194,281	406,053	(156,734)	[1]	960,257	[1]	730,572	[1]
Income taxes (benefit)										(642,927)		589,597		225,981
Income before income taxes										(799,661)		1,549,854		956,553
Computed at statutory rate (35%)										(279,881)		542,449		334,794
State income taxes net of federal income tax effect										29,944		44,708		13,599
Regulatory differences - utility plant items										32,089		39,321		32,324
Equity component of AFUDC										(18,191)		(21,108)		(22,356)
Amortization of investment tax credits										(11,136)		(12,211)		(13,535)
Deferred tax reversal on PPA settlement	[2]									0		21,500		0
Flow-through / permanent differences										(7,872)		(18,003)		(301)
Income Tax Reconciliation Provision For Uncertain Tax Positions	[3]									(56,683)		32,573		(59,249)
Benefit of Entergy Corporation expenses										0		0		(27,192)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount										0		0		(31,573)
Other - net										2,458		3,368		2,369
Total income taxes as reported										$ (642,927)		$ 589,597		$ 225,981
Effective Income Tax Rate										80.40%		38.00%		23.60%
Net of Tax Regulatory Liability										$ 0		$ 0		$ (2,899)
Increase (Reduction) in tax resulting from Louisiana business combination										(333,655)		0		0
Parent Company [Member]
Net income (loss) attributable to Entergy Corporation										(176,600)		940,700		711,900
Entergy Arkansas [Member]
Net income (loss) attributable to Entergy Corporation		(22,499)	53,944	19,807	16,147	(682)	61,262	27,287	26,652	67,399		114,519		155,075
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										6,873		6,873		6,873
Consolidated net income (loss)		(20,780)	55,662	21,525	17,865	1,037	62,980	29,005	28,370	74,272		121,392		161,948
Income taxes (benefit)										40,541		83,629		91,787
Income before income taxes										114,813		205,021		253,735
Computed at statutory rate (35%)										40,185		71,757		88,807
State income taxes net of federal income tax effect										6,643		9,591		10,954
Regulatory differences - utility plant items										7,299		8,653		7,938
Equity component of AFUDC										(4,979)		(2,533)		(3,820)
Amortization of investment tax credits										(1,201)		(1,251)		(1,989)
Flow-through / permanent differences										(4,062)		(5,082)		2,540
Non-taxable dividend income										0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions										(3,978)		1,881		(6,527)
Benefit of Entergy Corporation expenses														(6,753)
Other - net										634		613		637
Total income taxes as reported										$ 40,541		$ 83,629		$ 91,787
Effective Income Tax Rate										35.30%		40.80%		36.20%
Net of Tax Regulatory Liability														$ 0
Entergy Louisiana [Member]
Net income (loss) attributable to Entergy Corporation		24,410	185,290	107,037	124,165	54,036	177,412	103,872	102,906	$ 440,902		$ 438,226		406,351
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										5,737		7,796		7,775
Consolidated net income (loss)		24,409	187,140	108,981	126,109	55,978	179,356	105,838	104,850	446,639		446,022		414,126
Income taxes (benefit)										178,671		185,052		138,696
Income before income taxes										625,310		631,074		552,822
Computed at statutory rate (35%)										218,859		220,876		193,488
State income taxes net of federal income tax effect										23,650		11,666		19,084
Regulatory differences - utility plant items										3,013		7,487		7,005
Equity component of AFUDC										(5,420)		(14,612)		(13,100)
Amortization of investment tax credits										(5,252)		(5,594)		(5,864)
Flow-through / permanent differences										2,460		(225)		3,646
Non-taxable dividend income										(44,658)		(41,255)		(36,953)
Income Tax Reconciliation Provision For Uncertain Tax Positions										(15,377)		5,336		(18,645)
Benefit of Entergy Corporation expenses														(7,453)
Other - net										1,396		1,373		387
Total income taxes as reported										$ 178,671		$ 185,052		$ 138,696
Effective Income Tax Rate										28.60%		29.30%		25.10%
Net of Tax Regulatory Liability														$ (2,899)
Entergy Mississippi [Member]
Net income (loss) attributable to Entergy Corporation		4,211	35,869	25,572	24,228	28,175	(7,171)	25,857	25,132	$ 89,880		$ 71,993		79,331
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										2,828		2,828		2,828
Consolidated net income (loss)		4,918	36,576	26,279	24,935	28,882	(6,464)	26,564	25,839	92,708		74,821		82,159
Income taxes (benefit)										61,872		55,710		49,757
Income before income taxes										154,580		130,531		131,916
Computed at statutory rate (35%)										54,103		45,686		46,171
State income taxes net of federal income tax effect										5,219		5,180		4,564
Regulatory differences - utility plant items										2,383		4,448		2,603
Equity component of AFUDC										(1,083)		(833)		(764)
Amortization of investment tax credits										(160)		(260)		(260)
Flow-through / permanent differences										431		555		1,702
Non-taxable dividend income										0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions										756		718		(326)
Benefit of Entergy Corporation expenses														(4,177)
Other - net										223		216		244
Total income taxes as reported										$ 61,872		$ 55,710		$ 49,757
Effective Income Tax Rate										40.00%		42.70%		37.70%
Net of Tax Regulatory Liability														$ 0
Entergy New Orleans [Member]
Net income (loss) attributable to Entergy Corporation		3,333	18,922	10,654	11,051	156	15,709	6,165	8,035	$ 43,960		$ 30,065		11,643
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										965		965		965
Consolidated net income (loss)		3,575	19,163	10,895	11,292	398	15,950	6,406	8,276	44,925		31,030		12,608
Income taxes (benefit)										25,190		13,450		2,277
Income before income taxes										70,115		44,480		14,885
Computed at statutory rate (35%)										24,540		15,568		5,210
State income taxes net of federal income tax effect										2,887		1,562		1,116
Regulatory differences - utility plant items										2,201		777		453
Equity component of AFUDC										(451)		(320)		(322)
Amortization of investment tax credits										(111)		(218)		(216)
Flow-through / permanent differences										(4,539)		(4,458)		(4,402)
Non-taxable dividend income										0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions										525		405		795
Benefit of Entergy Corporation expenses														(501)
Other - net										138		134		144
Total income taxes as reported										$ 25,190		$ 13,450		$ 2,277
Effective Income Tax Rate										35.90%		30.20%		15.30%
Net of Tax Regulatory Liability														$ 0
Entergy Texas [Member]
Consolidated net income (loss)		(5,170)	43,314	14,890	16,591	3,495	39,559	18,585	13,165	$ 69,625		$ 74,804		57,881
Income taxes (benefit)										37,250		49,644		30,108
Income before income taxes										106,875		124,448		87,989
Computed at statutory rate (35%)										37,406		43,557		30,796
State income taxes net of federal income tax effect										1,621		3,221		(897)
Regulatory differences - utility plant items										3,703		4,165		3,256
Equity component of AFUDC										(1,987)		(1,035)		(1,626)
Amortization of investment tax credits										(900)		(1,412)		(1,596)
Flow-through / permanent differences										530		393		2,467
Non-taxable dividend income										0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions										(3,365)		522		1,027
Benefit of Entergy Corporation expenses														(3,542)
Other - net										242		233		223
Total income taxes as reported										$ 37,250		$ 49,644		$ 30,108
Effective Income Tax Rate										34.90%		39.90%		34.20%
Net of Tax Regulatory Liability														$ 0
System Energy [Member]
Consolidated net income (loss)		$ 38,702	$ 25,223	$ 21,860	$ 25,533	$ 19,054	$ 26,730	$ 25,931	$ 24,619	$ 111,318		$ 96,334		113,664
Income taxes (benefit)										53,077		83,310		68,853
Income before income taxes										164,395		179,644		182,517
Computed at statutory rate (35%)										57,538		62,875		63,881
State income taxes net of federal income tax effect										6,403		6,877		5,900
Regulatory differences - utility plant items										12,167		13,791		11,070
Equity component of AFUDC										(2,973)		(1,774)		(2,724)
Amortization of investment tax credits										(3,476)		(3,476)		(3,476)
Flow-through / permanent differences										618		(327)		(491)
Non-taxable dividend income										0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions										(17,313)		5,235		(5,353)
Benefit of Entergy Corporation expenses														(13)
Other - net										113		109		59
Total income taxes as reported										$ 53,077		$ 83,310		$ 68,853
Effective Income Tax Rate										32.30%		46.40%		37.70%

[1] (a) Consolidated net income and preferred dividend requirements of subsidiaries for 2015, 2014, and 2013 include $14.9 million, $12.9 million, and $12 million, respectively, of preferred dividends on subsidiaries’ preferred stock without sinking fund that is not presented as equity.

[2] (a)In March 2014, New York enacted legislation that substantially modifies various aspects of New York tax law. The most significant effect of the legislation for Entergy is the adoption of full water’s-edge unitary combined reporting, meaning that all of Entergy’s domestic entities will be included in New York’s combined filing group. The effect of the tax law change resulted in a deferred state income tax reduction of approximately $21.5 million as shown in the table above.

[3] See “Income Tax Audits - 2008-2009 IRS Audit” below for discussion of the most significant items for 2015 and 2013.