Equity (Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	$ (336,578)	$ (500,507)	$ (332,528)	$ (449,207)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(15,889)	(43,819)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	11,839	(7,481)
Other comprehensive income (loss)	(4,050)	(51,300)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	(5,248)	11,963	7,154	56,650
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(15,875)	(45,301)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	3,473	614
Other comprehensive income (loss)	(12,402)	(44,687)
Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(4,050)	(51,300)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	(330,319)	(511,609)	(338,647)	(534,576)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	8,328	22,967
Other comprehensive income (loss)	8,328	22,967
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	(1,011)	(861)	(1,035)	28,719
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(14)	1,482
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	38	(31,062)
Other comprehensive income (loss)	24	(29,580)
Entergy Louisiana [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	7,665		8,278
Other comprehensive income (loss)	(613)	(407)
Entergy Louisiana [Member] | Accumulated Other Comprehensive Income [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(613)	(407)
Entergy Louisiana [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss	7,665	3,920	$ 8,278	$ 4,327
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(613)	(407)
Other comprehensive income (loss)	$ (613)	$ (407)