Income Taxes (Schedule Of Statutory Income Tax Rate To Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Net income (loss) attributable to Entergy Corporation	$ (1,769,068)	$ 388,170	$ 567,314	$ 229,966	$ 99,573	$ (723,027)	$ 148,843	$ 298,050	$ (583,618)		$ (176,562)		$ 940,721
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									19,115		19,828		19,536
Consolidated net income (loss)	(1,765,539)	393,204	572,590	235,242	104,849	(718,233)	153,722	302,929	(564,503)	[1]	(156,734)	[1]	960,257	[1]
Income Tax Expense (Benefit)									(817,259)		(642,927)		589,597
Income before income taxes									(1,381,762)		(799,661)		1,549,854
Computed at statutory rate (35%)									(483,617)		(279,881)		542,449
State income taxes net of federal income tax effect									40,581		29,944		44,708
Regulatory differences - utility plant items									33,581		32,089		39,321
Equity component of AFUDC									(23,647)		(18,191)		(21,108)
Amortization of investment tax credits									(10,889)		(11,136)		(12,211)
Deferred tax reversal on PPA settlement									0		0		21,500
Flow-through / permanent differences									(19,307)		(7,872)		(18,003)
Income Tax Reconciliation Provision For Uncertain Tax Positions									(67,119)		(56,683)		32,573
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									11,411		0		0
Other - net									$ 2,984		$ 2,458		$ 3,368
Effective Income Tax Rate									59.10%		80.40%		38.00%
Increase (Reduction) in tax resulting from Louisiana business combination									$ 0		$ (333,655)		$ 0
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring									(237,760)		0		0
Increase (Reduction) in income tax resulting from Act 55 financing settlement									(63,477)		0		0
Entergy Arkansas [Member]
Net income (loss) attributable to Entergy Corporation	3,521	108,672	32,173	17,576	(22,499)	53,944	19,807	16,147	161,942		67,399		114,519
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									5,270		6,873		6,873
Consolidated net income (loss)	3,879	110,148	33,891	19,294	(20,780)	55,662	21,525	17,865	167,212		74,272		121,392
Income Tax Expense (Benefit)									107,773		40,541		83,629
Income before income taxes									274,985		114,813		205,021
Computed at statutory rate (35%)									96,245		40,185		71,757
State income taxes net of federal income tax effect									11,652		6,643		9,591
Regulatory differences - utility plant items									10,971		7,299		8,653
Equity component of AFUDC									(5,985)		(4,979)		(2,533)
Amortization of investment tax credits									(1,201)		(1,201)		(1,251)
Flow-through / permanent differences									(3,848)		(4,062)		(5,082)
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									(717)		(3,978)		1,881
Other - net									$ 656		$ 634		$ 613
Effective Income Tax Rate									39.20%		35.30%		40.80%
Increase (Reduction) in income tax resulting from Act 55 financing settlement									$ 0
Entergy Louisiana [Member]
Net income (loss) attributable to Entergy Corporation	67,610	189,506	253,325	111,606	24,410	185,290	107,037	124,165	622,047		$ 440,902		$ 438,226
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									0		5,737		7,796
Consolidated net income (loss)	67,610	189,506	253,325	111,606	24,409	187,140	108,981	126,109	622,047		446,639		446,022
Income Tax Expense (Benefit)									89,734		178,671		185,052
Income before income taxes									711,781		625,310		631,074
Computed at statutory rate (35%)									249,123		218,859		220,876
State income taxes net of federal income tax effect									29,014		23,650		11,666
Regulatory differences - utility plant items									8,094		3,013		7,487
Equity component of AFUDC									(9,774)		(5,420)		(14,612)
Amortization of investment tax credits									(5,019)		(5,252)		(5,594)
Flow-through / permanent differences									(980)		2,460		(225)
Non-taxable dividend income									(44,658)		(44,658)		(41,255)
Income Tax Reconciliation Provision For Uncertain Tax Positions									(75,871)		(15,377)		5,336
Other - net									$ 1,425		$ 1,396		$ 1,373
Effective Income Tax Rate									12.60%		28.60%		29.30%
Increase (Reduction) in income tax resulting from Act 55 financing settlement									$ (61,620)
Entergy Mississippi [Member]
Net income (loss) attributable to Entergy Corporation	12,938	45,905	31,487	16,411	4,211	35,869	25,572	24,228	106,741		$ 89,880		$ 71,993
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									2,443		2,828		2,828
Consolidated net income (loss)	13,260	46,612	32,194	17,118	4,918	36,576	26,279	24,935	109,184		92,708		74,821
Income Tax Expense (Benefit)									63,854		61,872		55,710
Income before income taxes									173,038		154,580		130,531
Computed at statutory rate (35%)									60,563		54,103		45,686
State income taxes net of federal income tax effect									5,592		5,219		5,180
Regulatory differences - utility plant items									(1,154)		2,383		4,448
Equity component of AFUDC									(2,030)		(1,083)		(833)
Amortization of investment tax credits									(160)		(160)		(260)
Flow-through / permanent differences									764		431		555
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									50		756		718
Other - net									$ 229		$ 223		$ 216
Effective Income Tax Rate									36.90%		40.00%		42.70%
Increase (Reduction) in income tax resulting from Act 55 financing settlement									$ 0
Entergy New Orleans [Member]
Net income (loss) attributable to Entergy Corporation	1,896	23,460	11,602	10,926	3,333	18,922	10,654	11,051	47,884		$ 43,960		$ 30,065
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									965		965		965
Consolidated net income (loss)	2,138	23,701	11,843	11,167	3,575	19,163	10,895	11,292	48,849		44,925		31,030
Income Tax Expense (Benefit)									28,705		25,190		13,450
Income before income taxes									77,554		70,115		44,480
Computed at statutory rate (35%)									27,144		24,540		15,568
State income taxes net of federal income tax effect									3,543		2,887		1,562
Regulatory differences - utility plant items									2,329		2,201		777
Equity component of AFUDC									(412)		(451)		(320)
Amortization of investment tax credits									(132)		(111)		(218)
Flow-through / permanent differences									(3,609)		(4,539)		(4,458)
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									(300)		525		405
Other - net									$ 142		$ 138		$ 134
Effective Income Tax Rate									37.00%		35.90%		30.20%
Increase (Reduction) in income tax resulting from Act 55 financing settlement									$ 0
Entergy Texas [Member]
Consolidated net income (loss)	12,785	56,133	24,058	14,562	(5,170)	43,314	14,890	16,591	107,538		$ 69,625		$ 74,804
Income Tax Expense (Benefit)									63,097		37,250		49,644
Income before income taxes									170,635		106,875		124,448
Computed at statutory rate (35%)									59,722		37,406		43,557
State income taxes net of federal income tax effect									449		1,621		3,221
Regulatory differences - utility plant items									4,140		3,703		4,165
Equity component of AFUDC									(2,666)		(1,987)		(1,035)
Amortization of investment tax credits									(900)		(900)		(1,412)
Flow-through / permanent differences									634		530		393
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									1,926		(3,365)		522
Other - net									$ 246		$ 242		$ 233
Effective Income Tax Rate									37.00%		34.90%		39.90%
Increase (Reduction) in income tax resulting from Act 55 financing settlement									$ (454)
System Energy [Member]
Consolidated net income (loss)	$ 23,326	$ 22,370	$ 25,090	$ 25,958	$ 38,702	$ 25,223	$ 21,860	$ 25,533	96,744		$ 111,318		$ 96,334
Income Tax Expense (Benefit)									71,061		53,077		83,310
Income before income taxes									167,805		164,395		179,644
Computed at statutory rate (35%)									58,732		57,538		62,875
State income taxes net of federal income tax effect									7,001		6,403		6,877
Regulatory differences - utility plant items									9,201		12,167		13,791
Equity component of AFUDC									(2,780)		(2,973)		(1,774)
Amortization of investment tax credits									(3,476)		(3,476)		(3,476)
Flow-through / permanent differences									(883)		618		(327)
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									3,151		(17,313)		5,235
Other - net									$ 115		$ 113		$ 109
Effective Income Tax Rate									42.30%		32.30%		46.40%
Increase (Reduction) in income tax resulting from Act 55 financing settlement									$ 0

[1] (a) Consolidated net income and preferred dividend requirements of subsidiaries include $19.1 million for 2016, $14.9 million for 2015, and $12.9 million for 2014 of preferred dividends on subsidiaries’ preferred stock without sinking fund that is not presented as equity.