Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 390,805	$ 362,422
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(3,911)	3,729
Other Comprehensive Income (Loss), Net of Tax, Total	3,911	(3,729)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	394,716	358,693
Preferred dividend requirements of subsidiaries and net income (loss) attributable to noncontrolling interests	5,889	1,662
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	388,827	357,031
Entergy Louisiana [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	275,900	254,197
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	1,087	971
Other Comprehensive Income (Loss), Net of Tax, Total	(1,087)	(971)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	274,813	253,226
Net Income (Loss) Attributable to Noncontrolling Interest	707	752
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	274,106	252,474
Entergy Arkansas [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	82,701	86,523
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net Income (Loss) Attributable to Noncontrolling Interest	590	(1,191)
System Energy [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 23,016	$ 23,389