Equity (Accumulated Other Comprehensive Income (Loss))(Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 01, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax							$ (632,617)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss		$ (613,642)	$ (561,498)	$ 52,773	$ (613,642)	$ 52,773		$ (23,531)	$ 10,960	$ (34,971)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(70,490)		61,179	(35,200)	133,659
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		18,346		(19,366)	62,201	(45,915)
Other comprehensive income (loss)		(52,144)		41,813	27,001	87,744
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	[1]				(16,538)
Tax Cuts and Jobs Act, Reclassification from AOCI resulting from stranded tax effects			15,500		15,505
Restatement Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss							(656,148)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss				0		0			748	748
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				(748)		(748)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				0		0
Other comprehensive income (loss)				(748)		(748)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax							(632,617)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss		(8,842)	(6,201)	479,257	(8,842)	479,257		545,045	467,561	429,734
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(7,509)		33,870	(43,785)	73,742
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		4,868		(22,174)	8,288	(24,219)
Other comprehensive income (loss)		(2,641)		11,696	(35,497)	49,523
Tax Cuts and Jobs Act, Reclassification from AOCI resulting from stranded tax effects					114,227
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Restatement Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss							(87,572)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax							0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss		(589,926)	(605,491)	(449,898)	(589,926)	(449,898)		(531,099)	(460,814)	(469,446)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0		0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		15,565		10,916	32,139	19,548
Other comprehensive income (loss)		15,565		10,916	32,139	19,548
Tax Cuts and Jobs Act, Reclassification from AOCI resulting from stranded tax effects					(90,966)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Restatement Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss							(531,099)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax							0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss		(14,874)	50,194	23,414	(14,874)	23,414		(37,477)	3,465	3,993
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(62,981)		28,057	8,585	60,665
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(2,087)		(8,108)	21,774	(41,244)
Other comprehensive income (loss)		(65,068)		19,949	30,359	19,421
Tax Cuts and Jobs Act, Reclassification from AOCI resulting from stranded tax effects					(7,756)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Restatement Adjustment [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss							$ (37,477)
Entergy Louisiana [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss		(57,451)			(57,451)			(46,400)
Other comprehensive income (loss)		(501)		(310)	(1,002)	(680)
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect					(3,787)
Entergy Louisiana [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive loss		(57,451)	$ (56,950)	(49,122)	(57,451)	(49,122)		$ (46,400)	$ (48,812)	$ (48,442)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(501)		(310)	(1,002)	(680)
Other comprehensive income (loss)		$ (501)		$ (310)	(1,002)	(680)
Tax Cuts and Jobs Act, Reclassification from AOCI resulting from stranded tax effects					$ (10,049)	$ 0

[1] (a) Consolidated net income and preferred dividend requirements of subsidiaries for 2018 and 2017 include $6.9 million and $6.9 million, respectively, of preferred dividends on subsidiaries’ preferred stock without sinking fund that is not presented within equity.