Income Taxes Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Dec. 31, 2022	Dec. 31, 2021	Oct. 15, 2024
Discontinued Operation, Tax Effect of Discontinued Operation		$ 29
Entergy Arkansas [Member]
State Effective Income Tax Rate, Percent			6.50%
Regulatory Liability For Income Taxes - Current and Non Current	$ 25		$ 25
Entergy Arkansas [Member] | Subsequent Event [Member]
State Effective Income Tax Rate, Percent				5.90%	6.20%
Reduction to Effective Income Tax Rate At Combined Federal and State Income Tax Rate				0.50%
Preferred Stock, Five Point Three Seven Five Percent, Series A [Member] | Entergy Texas [Member]
Preferred Stock, Dividend Rate, Percentage	5.375%		5.375%
Preferred Stock, Liquidation Preference Per Share	$ 25		$ 25
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 35		$ 35
Preferred Stock, Five Point Three Seven Five Percent, Series A [Member] | Entergy Texas [Member] | Subsequent Event [Member]
Preferred Stock, Liquidation Preference Per Share						$ 25