Income Taxes Income Taxes (Reduction to Regulatory Liability Due to Return of Unprotected Excess ADIT (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jan. 01, 2024	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	$ 50,000,000
Regulatory Liability For Income Taxes Net	1,223,532,000				1,223,532,000				$ 1,258,276,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities					204,817,000	(116,315,000)
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	433,687,000				433,687,000				435,157,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities	14,000,000	$ 8,000,000			68,475,000	(305,972,000)
Entergy Arkansas [Member] | Subsequent Event [Member]
State Effective Income tax Rate, Percent							4.80%
Entergy Louisiana [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0			6,000,000	0	25,000,000
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	323,956,000				323,956,000				337,836,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities					200,267,000	(92,554,000)
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	193,812,000				193,812,000				202,058,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities					(52,712,000)	31,682,000
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	42,028,000				42,028,000				39,738,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities					17,878,000	(8,921,000)
Entergy Texas [Member]
Reduction to regulatory liability due to return of unprotected excess accumulated deferred income taxes	0			$ 10,000,000	0	24,000,000
Regulatory Liability For Income Taxes Net	121,472,000				121,472,000				132,647,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities					(13,111,000)	(23,014,000)
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	$ 108,577,000				108,577,000				$ 110,840,000
reduction of taxable income [Abstract]
Increase (Decrease) in Regulatory Liabilities					$ (15,981,000)	$ 282,463,000