Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Regulatory Liability, Noncurrent	$ 3,559,742		$ 3,911,839
Increase (Decrease) in Regulatory Liabilities	(384,331)	$ (201,803)
Income Tax Expense (Benefit)	87,790	100,041
Amortization of tax gross-up on customer advances	22,800	15,500
Entergy New Orleans [Member]
Regulatory Liability, Noncurrent	308,068		312,962
Increase (Decrease) in Regulatory Liabilities	(7,449)	(11,514)
Income Tax Expense (Benefit)	(99)	3,739
Entergy Arkansas [Member]
Regulatory Liability, Noncurrent	899,389		1,044,060
Increase (Decrease) in Regulatory Liabilities	(146,228)	(47,940)
Income Tax Expense (Benefit)	17,612	23,002
Amortization of tax gross-up on customer advances	1,400	1,100
Entergy Louisiana [Member]
Regulatory Liability, Noncurrent	1,523,530		1,630,763
Increase (Decrease) in Regulatory Liabilities	(124,355)	(101,039)
Income Tax Expense (Benefit)	50,556	54,062
Amortization of tax gross-up on customer advances	14,700	6,500
System Energy [Member]
Regulatory Liability, Noncurrent	777,194		897,301
Increase (Decrease) in Regulatory Liabilities	(123,005)	(45,323)
Income Tax Expense (Benefit)	4,336	6,276
Entergy Mississippi [Member]
Regulatory Liability, Noncurrent	151,993		144,124
Increase (Decrease) in Regulatory Liabilities	6,148	11,034
Income Tax Expense (Benefit)	27,482	14,917
Amortization of tax gross-up on customer advances	6,200	6,100
Entergy Texas [Member]
Regulatory Liability, Noncurrent	155,907		$ 138,969
Increase (Decrease) in Regulatory Liabilities	10,558	(6,314)
Income Tax Expense (Benefit)	14,325	12,344
Amortization of tax gross-up on customer advances	$ 500	$ 1,900