Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total		Subsidiaries Preferred Stock [Member]		Paid In Capital [Member]	Retained Earnings [Member]		Accumulated Other Comprehensive Income [Member]	Common Stock [Member]	Treasury Stock [Member]	Entergy Arkansas [Member]	Entergy Arkansas [Member] Paid In Capital [Member]	Entergy Arkansas [Member] Retained Earnings [Member]	Entergy Arkansas [Member] Common Stock [Member]	Entergy Louisiana [Member]	Entergy Louisiana [Member] Member's Equity [Member]	Entergy Louisiana [Member] Accumulated Other Comprehensive Income [Member]	Entergy Mississippi [Member]	Entergy Mississippi [Member] Capital Stock Expense and Other [Member]	Entergy Mississippi [Member] Retained Earnings [Member]	Entergy Mississippi [Member] Common Stock [Member]	Entergy New Orleans [Member]	Entergy Texas [Member]	Entergy Texas [Member] Paid In Capital [Member]	Entergy Texas [Member] Retained Earnings [Member]	Entergy Texas [Member] Common Stock [Member]	System Energy [Member]	System Energy [Member] Retained Earnings [Member]	System Energy [Member] Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 8,081,809		$ 0		$ 5,417,245	$ 8,195,571		$ (34,971)	$ 2,548	$ (5,498,584)	$ 2,253,317	$ 790,243	$ 1,462,604	$ 470	$ 5,081,809	$ 5,130,251	$ (48,442)	$ 1,094,791	$ 167	$ 895,298	$ 199,326	$ 426,946	$ 1,068,994	$ 481,994	$ 537,548	$ 49,452	$ 738,823	$ 59,473	$ 679,350
Consolidated net income	86,051	[1]	3,446	[1]	0	82,605	[1]	0	0	0	14,304	0	14,304	0	94,378	94,378	0	17,158	0	17,158	0	10,978	10,854	0	10,854	0	20,347	20,347	0
Other comprehensive income (loss)	45,931		0		0	0		45,931	0	0					(370)	0	(370)
Common stock issuances related to stock plans	2,917		0		(19,166)	0		0	0	22,083
Common stock	(156,073)		0		0	(156,073)		0	0	0					(42,125)	(42,125)	0					(12,200)					0
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable	3,446	[1]	3,446	[1]	0	0		0	0	0	357	0	357	0				238	0	238	0	241
Other															(4)	(4)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	8,057,189		0		5,398,079	8,122,103		10,960	2,548	(5,476,501)	2,267,264	790,243	1,476,551	470	5,133,688	5,182,500	(48,812)	1,111,711	167	912,218	199,326	425,483	1,079,848	481,994	548,402	49,452	759,170	79,820	679,350
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	7,992,515		0		5,433,433	7,977,702		(23,531)	2,548	(5,397,637)	2,376,754	790,264	1,586,020	470	5,308,804	5,355,204	(46,400)	1,177,870	167	978,377	199,326	415,548	1,260,167	596,994	613,721	49,452	710,809	52,459	658,350
Consolidated net income	136,200	[1]	3,439	[1]	0	132,761	[1]	0	0	0	36,255	0	36,255	0	111,593	111,593	0	22,843	0	22,843	0	10,882	17,350	0	17,350	0	22,308	22,308	0
Dividends, Common Stock, Cash																												6,740	56,500
Other comprehensive income (loss)	79,145		0		0	0		79,145	0	0					(501)	0	(501)
Common stock issuances related to stock plans	4,307		0		(16,170)	0		0	0	20,477
Common stock	(160,887)		0		0	(160,887)		0	0	0					0							(6,250)					(63,240)
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable	3,439	[1]	3,439	[1]	0	0		0	0	0	357	0	357	0				238	0	238	0	0
Other															24	24	0
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	(16,538)	[1]	0	[1]	0	(32,043)		15,505	0	0					(3,787)	6,262	(10,049)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 7,974,943		$ 0		$ 5,417,263	$ 8,493,790		$ (561,498)	$ 2,548	$ (5,377,160)	$ 2,412,652	$ 790,264	$ 1,621,918	$ 470	$ 5,416,133	$ 5,473,083	$ (56,950)	$ 1,200,475	$ 167	$ 1,000,982	$ 199,326	$ 420,180	$ 1,277,517	$ 596,994	$ 631,071	$ 49,452	$ 669,877	$ 68,027	$ 601,850

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