Equity (Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	$ (388,604)	$ (398,987)	$ (430,404)	$ (551,152)	$ (388,604)	$ (430,404)	$ (446,920)		$ (557,173)
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax								$ (6,806)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	27,435		115,193		171,980	157,043
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(17,052)		5,555		(113,664)	(23,468)
Other comprehensive income (loss)	10,383	47,933	120,748	12,827	58,316	133,575
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	60,255	41,690	26,736	12,466	60,255	26,736	25,946		(2,116)
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax								879
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	22,545		15,834		40,258	29,373
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(3,980)		(1,564)		(5,949)	(1,400)
Other comprehensive income (loss)	18,565		14,270		34,309	27,973
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	10,383	47,933	120,748	12,827
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	(485,949)	(503,173)	(508,876)	(520,372)	(485,949)	(508,876)	(557,072)		(531,922)
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax								0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0		0		34,349	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	17,224		11,496		36,774	23,046
Other comprehensive income (loss)	17,224		11,496		71,123	23,046
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	37,090	62,496	51,736	(43,246)	37,090	51,736	84,206		(23,135)
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax								(7,685)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	4,890		99,359		97,373	127,670
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(30,296)		(4,377)		(144,489)	(45,114)
Other comprehensive income (loss)	(25,406)		94,982		(47,116)	82,556
Entergy Louisiana [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	13,084				13,084		4,562
Other comprehensive income (loss)	(945)	9,467	(969)	(969)	8,522	(1,938)
Entergy Louisiana [Member] | Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(945)	9,467	(969)	(969)
Entergy Louisiana [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	13,084	$ 14,029	(8,091)	$ (7,122)	13,084	(8,091)	$ 4,562		$ (6,153)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax					10,050	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(945)		(969)		(1,528)	(1,938)
Other comprehensive income (loss)	$ (945)		$ (969)		$ 8,522	$ (1,938)
Restatement Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss								(563,979)
Restatement Adjustment [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss								(1,237)
Restatement Adjustment [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss								(531,922)
Restatement Adjustment [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss								$ (30,820)