Income Taxes Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2022
Discontinued Operation, Tax Effect of Discontinued Operation	$ 29
Entergy Arkansas [Member]
Reduction to regulatory liability for income taxes resulting from return of unprotected excess ADIT	$ 32
State Effective Income Tax Rate, Percent	6.50%
Entergy Arkansas [Member] | Subsequent Event [Member]
State Effective Income Tax Rate, Percent		5.90%
Reduction to Effective Income Tax Rate At Combined Federal and State Income Tax Rate		0.40%
Entergy Louisiana [Member]
Reduction to regulatory liability for income taxes resulting from return of unprotected excess ADIT	$ 7
Entergy Texas [Member]
Reduction to regulatory liability for income taxes resulting from return of unprotected excess ADIT	$ 22