Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current Federal Tax Expense (Benefit)		$ 66,708	$ 60,639	$ 32,387
Current State and Local Tax Expense (Benefit)		44,956	23,014	(3,091)
Current Income Tax Expense (Benefit)		111,664	83,653	29,296
Deferred Income Tax Expense (Benefit)		281,190	(768,941)	(67,520)
Other Tax Expense (Benefit)		(11,827)	(5,247)	(754)
Income Tax Expense (Benefit)	$ 9,000	381,027	(690,535)	(38,978)
Entergy Arkansas [Member]
Current Federal Tax Expense (Benefit)		(10,558)	33,100	8,015
Current State and Local Tax Expense (Benefit)		(2,275)	(4,201)	(1,066)
Current Income Tax Expense (Benefit)		(12,833)	28,899	6,949
Deferred Income Tax Expense (Benefit)		88,637	(126,878)	74,802
Other Tax Expense (Benefit)		(1,230)	(1,231)	(855)
Income Tax Expense (Benefit)		74,574	(99,210)	80,896
Entergy Louisiana [Member]
Current Federal Tax Expense (Benefit)		(79,519)	(142,253)	(79,079)
Current State and Local Tax Expense (Benefit)		1,709	(6,397)	(1,773)
Current Income Tax Expense (Benefit)		(77,810)	(148,650)	(80,852)
Deferred Income Tax Expense (Benefit)		307,835	(52,451)	(77,223)
Other Tax Expense (Benefit)		(4,616)	(4,680)	(4,778)
Income Tax Expense (Benefit)		225,409	(205,781)	(162,853)
Entergy Mississippi [Member]
Current Federal Tax Expense (Benefit)		38,680	20,328	9,242
Current State and Local Tax Expense (Benefit)		2,407	4,142	(6,486)
Current Income Tax Expense (Benefit)		41,087	24,470	2,756
Deferred Income Tax Expense (Benefit)		39,608	30,690	48,443
Other Tax Expense (Benefit)		(380)	(796)	3,665
Income Tax Expense (Benefit)		80,315	54,364	54,864
Entergy New Orleans [Member]
Current Federal Tax Expense (Benefit)		(8,022)	(99,343)	1,074
Current State and Local Tax Expense (Benefit)		5,331	(5,854)	6,221
Current Income Tax Expense (Benefit)		(2,691)	(105,197)	7,295
Deferred Income Tax Expense (Benefit)		6,381	(84,744)	16,814
Other Tax Expense (Benefit)		(848)	(32)	168
Income Tax Expense (Benefit)		2,842	(189,973)	24,277
Entergy Texas [Member]
Current Federal Tax Expense (Benefit)		8,281	2,851	37,471
Current State and Local Tax Expense (Benefit)		5,468	3,719	2,260
Current Income Tax Expense (Benefit)		13,749	6,570	39,731
Deferred Income Tax Expense (Benefit)		52,702	57,066	11,520
Other Tax Expense (Benefit)		(767)	(764)	(630)
Income Tax Expense (Benefit)		65,684	62,872	50,621
System Energy [Member]
Current Federal Tax Expense (Benefit)		(5,527)	337	(11,720)
Current State and Local Tax Expense (Benefit)		(396)	(1,570)	581
Current Income Tax Expense (Benefit)		(5,923)	(1,233)	(11,139)
Deferred Income Tax Expense (Benefit)		39,409	31,005	(83,369)
Other Tax Expense (Benefit)		(3,983)	2,260	1,680
Income Tax Expense (Benefit)		$ 29,503	$ 32,032	$ (92,828)