Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Regulatory Liability, Noncurrent		$ 3,659,163		$ 3,659,163		$ 3,609,463
Increase (Decrease) in Regulatory Liabilities				20,040	$ 380,394
Income Tax Expense (Benefit)		138,399	$ 33,634	238,440	54,627
Production tax credits		571,200		571,200
Subsequent Event [Member] | Disposal Group, Held-for-Sale, Not Discontinued Operations | Entergy New Orleans and Entergy Louisiana natural gas distribution businesses
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 11,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, tax purposes	335,000
Entergy New Orleans [Member]
Regulatory Liability, Noncurrent		245,127		245,127		260,312
Increase (Decrease) in Regulatory Liabilities				(13,791)	167,529
Income Tax Expense (Benefit)		5,744	7,492	9,483	(11,841)
Entergy New Orleans [Member] | Subsequent Event [Member] | Disposal Group, Held-for-Sale, Not Discontinued Operations | Entergy New Orleans natural gas distribution business
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	5,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, tax purposes	185,000
Entergy Arkansas [Member]
Regulatory Liability, Noncurrent		889,400		889,400		831,165
Increase (Decrease) in Regulatory Liabilities				65,970	71,529
Income Tax Expense (Benefit)		25,677	32,120	48,679	21,446
Production tax credits		221,400		221,400
Entergy Louisiana [Member]
Regulatory Liability, Noncurrent		1,640,771		1,640,771		1,692,547
Increase (Decrease) in Regulatory Liabilities				(70,161)	286,036
Income Tax Expense (Benefit)		72,541	20,750	126,603	59,674
Production tax credits		208,900		208,900
Entergy Louisiana [Member] | Subsequent Event [Member] | Disposal Group, Held-for-Sale, Not Discontinued Operations | Entergy Louisiana natural gas distribution business
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	12,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, tax purposes	$ 150,000
System Energy [Member]
Regulatory Liability, Noncurrent		802,492		802,492		$ 747,190
Increase (Decrease) in Regulatory Liabilities				52,405	(115,256)
Income Tax Expense (Benefit)		5,119	$ 7,521	11,395	$ 15,533
Production tax credits		$ 140,900		$ 140,900