Income Taxes (Schedule Of Statutory Income Tax Rate To Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 560,410		$ 0		$ 0
Net income (loss) attributable to Entergy Corporation	$ (479,113)	$ 398,198	$ 409,922	$ 82,605	$ (1,769,068)	$ 388,170	$ 567,314	$ 229,966	411,612		(583,618)		(176,562)
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									13,741		19,115		19,828
Consolidated net income (loss)	(475,710)	401,644	413,368	86,051	(1,765,539)	393,204	572,590	235,242	425,353	[1]	(564,503)	[1]	(156,734)	[1]
Income Tax Expense (Benefit)									542,570		(817,259)		(642,927)
Income before income taxes									967,923		(1,381,762)		(799,661)
Computed at statutory rate (35%)									338,773		(483,617)		(279,881)
State income taxes net of federal income tax effect									44,179		40,581		29,944
Regulatory differences - utility plant items									39,825		33,581		32,089
Equity component of AFUDC									(33,282)		(23,647)		(18,191)
Amortization of investment tax credits									(10,204)		(10,889)		(11,136)
Flow-through / permanent differences									8,727		(19,307)		(7,872)
Income Tax Reconciliation Provision For Uncertain Tax Positions									8,756		(67,119)		(56,683)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									0		11,411		0
Other - net									$ 3,007		$ 2,984		$ 2,458
Effective Income Tax Rate									56.10%		59.10%		80.40%
Increase (Reduction) in tax resulting from Louisiana business combination									$ 0		$ 0		$ (333,655)
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring									(373,277)		(237,760)		0
Increase (Reduction) in income tax resulting from Act 55 financing settlement									0		(63,477)		0
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount									44,344		0		0
Entergy Arkansas [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									(3,090)
Net income (loss) attributable to Entergy Corporation	(6,005)	92,281	38,193	13,947	3,521	108,672	32,173	17,576	138,416		161,942		67,399
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									1,428		5,270		6,873
Consolidated net income (loss)	(5,648)	92,638	38,550	14,304	3,879	110,148	33,891	19,294	139,844		167,212		74,272
Income Tax Expense (Benefit)									93,804		107,773		40,541
Income before income taxes									233,648		274,985		114,813
Computed at statutory rate (35%)									81,777		96,245		40,185
State income taxes net of federal income tax effect									11,586		11,652		6,643
Regulatory differences - utility plant items									7,220		10,971		7,299
Equity component of AFUDC									(6,458)		(5,985)		(4,979)
Amortization of investment tax credits									(1,201)		(1,201)		(1,201)
Flow-through / permanent differences									3,098		(3,848)		(4,062)
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									200		(717)		(3,978)
Other - net									$ 672		$ 656		$ 634
Effective Income Tax Rate									40.10%		39.20%		35.30%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
Entergy Louisiana [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 217,258
Net income (loss) attributable to Entergy Corporation									316,347		622,047		$ 440,902
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									0		0		5,737
Consolidated net income (loss)	(88,794)	186,284	124,479	94,378	67,610	189,506	253,325	111,606	316,347		622,047		446,639
Income Tax Expense (Benefit)									485,298		89,734		178,671
Income before income taxes									801,645		711,781		625,310
Computed at statutory rate (35%)									280,576		249,123		218,859
State income taxes net of federal income tax effect									31,927		29,014		23,650
Regulatory differences - utility plant items									12,168		8,094		3,013
Equity component of AFUDC									(18,020)		(9,774)		(5,420)
Amortization of investment tax credits									(4,871)		(5,019)		(5,252)
Flow-through / permanent differences									3,774		(980)		2,460
Non-taxable dividend income									(44,658)		(44,658)		(44,658)
Income Tax Reconciliation Provision For Uncertain Tax Positions									5,700		(75,871)		(15,377)
Other - net									$ 1,444		$ 1,425		$ 1,396
Effective Income Tax Rate									60.50%		12.60%		28.60%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ (61,620)
Entergy Mississippi [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 3,492
Net income (loss) attributable to Entergy Corporation	17,788	46,307	28,064	16,920	12,938	45,905	31,487	16,411	109,079		106,741		$ 89,880
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									953		2,443		2,828
Consolidated net income (loss)	18,026	46,545	28,303	17,158	13,260	46,612	32,194	17,118	110,032		109,184		92,708
Income Tax Expense (Benefit)									73,919		63,854		61,872
Income before income taxes									183,951		173,038		154,580
Computed at statutory rate (35%)									64,383		60,563		54,103
State income taxes net of federal income tax effect									6,202		5,592		5,219
Regulatory differences - utility plant items									1,356		(1,154)		2,383
Equity component of AFUDC									(3,383)		(2,030)		(1,083)
Amortization of investment tax credits									(160)		(160)		(160)
Flow-through / permanent differences									1,567		764		431
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									228		50		756
Other - net									$ 234		$ 229		$ 223
Effective Income Tax Rate									40.20%		36.90%		40.00%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
Entergy New Orleans [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 6,153
Net income (loss) attributable to Entergy Corporation	46	18,288	14,641	10,737	1,896	23,460	11,602	10,926	43,712		47,884		$ 43,960
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									841		965		965
Consolidated net income (loss)	164	18,529	14,882	10,978	2,138	23,701	11,843	11,167	44,553		48,849		44,925
Income Tax Expense (Benefit)									33,278		28,705		25,190
Income before income taxes									77,831		77,554		70,115
Computed at statutory rate (35%)									27,241		27,144		24,540
State income taxes net of federal income tax effect									2,842		3,543		2,887
Regulatory differences - utility plant items									619		2,329		2,201
Equity component of AFUDC									(847)		(412)		(451)
Amortization of investment tax credits									(124)		(132)		(111)
Flow-through / permanent differences									(3,352)		(3,609)		(4,539)
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									600		(300)		525
Other - net									$ 146		$ 142		$ 138
Effective Income Tax Rate									42.80%		37.00%		35.90%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
Entergy Texas [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 2,981
Consolidated net income (loss)	4,630	39,588	21,101	10,854	12,785	56,133	24,058	14,562	76,173		107,538		$ 69,625
Income Tax Expense (Benefit)									48,481		63,097		37,250
Income before income taxes									124,654		170,635		106,875
Computed at statutory rate (35%)									43,629		59,722		37,406
State income taxes net of federal income tax effect									527		449		1,621
Regulatory differences - utility plant items									5,581		4,140		3,703
Equity component of AFUDC									(2,353)		(2,666)		(1,987)
Amortization of investment tax credits									(951)		(900)		(900)
Flow-through / permanent differences									1,428		634		530
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									(2,617)		1,926		(3,365)
Other - net									$ 256		$ 246		$ 242
Effective Income Tax Rate									38.90%		37.00%		34.90%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ (454)
System Energy [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ (69)
Consolidated net income (loss)	$ 18,316	$ 20,583	$ 19,350	$ 20,347	$ 23,326	$ 22,370	$ 25,090	$ 25,958	78,596		96,744		$ 111,318
Income Tax Expense (Benefit)									69,969		71,061		53,077
Income before income taxes									148,565		167,805		164,395
Computed at statutory rate (35%)									51,998		58,732		57,538
State income taxes net of federal income tax effect									5,635		7,001		6,403
Regulatory differences - utility plant items									12,880		9,201		12,167
Equity component of AFUDC									(2,221)		(2,780)		(2,973)
Amortization of investment tax credits									(2,896)		(3,476)		(3,476)
Flow-through / permanent differences									(276)		(883)		618
Non-taxable dividend income									0		0		0
Income Tax Reconciliation Provision For Uncertain Tax Positions									4,800		3,151		(17,313)
Other - net									$ 118		$ 115		$ 113
Effective Income Tax Rate									47.10%		42.30%		32.30%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0

[1] (a) Consolidated net income and preferred dividend requirements of subsidiaries include $13.7 million for 2017, $19.1 million for 2016, and $14.9 million for 2015 of preferred dividends on subsidiaries’ preferred stock without sinking fund that is not presented as equity.