Equity (Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	$ (478,739)	$ (500,507)	$ (388,604)	$ (398,987)	$ (478,739)	$ (388,604)	$ (449,207)	$ (446,920)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	634		27,435		(43,186)	171,980
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	21,134		(17,052)		13,654	(113,664)
Other comprehensive income (loss)	21,768	(51,300)	10,383	47,933	(29,532)	58,316
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	11,855	11,963	60,255	41,690	11,855	60,255	56,650	25,946
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	648		22,545		(44,653)	40,258
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(756)		(3,980)		(142)	(5,949)
Other comprehensive income (loss)	(108)		18,565		(44,795)	34,309
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	21,768	(51,300)	10,383	47,933
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	(489,511)	(511,609)	(485,949)	(503,173)	(489,511)	(485,949)	(534,576)	(557,072)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0		0		0	34,349
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	22,098		17,224		45,065	36,774
Other comprehensive income (loss)	22,098		17,224		45,065	71,123
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	(1,083)	(861)	37,090	62,496	(1,083)	37,090	28,719	84,206
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(14)		4,890		1,467	97,373
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(208)		(30,296)		(31,269)	(144,489)
Other comprehensive income (loss)	(222)		(25,406)		(29,802)	(47,116)
Entergy Louisiana [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	4,508				4,508		4,327
Other comprehensive income (loss)	588	(407)	(945)	9,467	181	8,522
Entergy Louisiana [Member] | Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	588	(407)	(945)	9,467
Entergy Louisiana [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	4,508	$ 3,920	13,084	$ 14,029	4,508	13,084	$ 4,327	$ 4,562
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax					0	10,050
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	588		(945)		181	(1,528)
Other comprehensive income (loss)	$ 588		$ (945)		$ 181	$ 8,522