Income Taxes Income Taxes (Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Apr. 30, 2023	Apr. 01, 2023	Dec. 31, 2022
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	$ 0		$ 16,000,000	$ 0	$ 33,000,000
Regulatory Liability For Income Taxes Net	1,225,578,000			1,225,578,000				$ 1,258,276,000
Entergy Arkansas [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0			0
State Effective Income tax Rate, Percent		5.30%					5.10%
Regulatory Liability For Income Taxes Net	424,591,000			424,591,000		$ 8,000,000		435,157,000
Entergy Louisiana [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0		9,000,000	0	18,000,000
Regulatory charge recorded as a result of reduction in income tax expense		$ 103,000,000
Regulatory charge recorded as a result of reduction in income tax expense, net of tax		76,000,000
Reduction to income tax expense - net of provision for uncertain tax positions		133,000,000
Reduction to income tax expense - net, offset by other tax charges		$ 129,000,000
Regulatory Liability For Income Taxes Net	328,105,000			328,105,000				337,836,000
Entergy Mississippi [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0			0
Regulatory Liability For Income Taxes Net	196,612,000			196,612,000				202,058,000
Entergy New Orleans [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0			0	1,000,000
Regulatory Liability For Income Taxes Net	42,162,000			42,162,000				39,738,000
Entergy Texas [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0		$ 7,000,000	0	$ 14,000,000
Regulatory Liability For Income Taxes Net	124,742,000			124,742,000				132,647,000
System Energy [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0			0
Regulatory Liability For Income Taxes Net	$ 109,366,000			$ 109,366,000				$ 110,840,000