Retirement And Other Postretirement Benefits (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		$ 400,000		$ 400,000
Defined Benefit Plan, Plan Assets, Contributions by Employer				170,000
Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		78,605		78,605
Defined Benefit Plan, Plan Assets, Contributions by Employer				44,300
Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		41,641		41,641
Defined Benefit Plan, Plan Assets, Contributions by Employer				24,319
Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		27,716		27,716
Defined Benefit Plan, Plan Assets, Contributions by Employer				15,685
Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		922		922
Defined Benefit Plan, Plan Assets, Contributions by Employer				922
Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		1,924		1,924
Defined Benefit Plan, Plan Assets, Contributions by Employer				1,632
Difference between rate case pension amounts and actuarially determined pension amounts		25,400		25,400
System Energy [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		26,376		26,376
Defined Benefit Plan, Plan Assets, Contributions by Employer				12,754
Subsequent Event [Member] | Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 34,305
Subsequent Event [Member] | Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	17,322
Subsequent Event [Member] | Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	12,031
Subsequent Event [Member] | Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	0
Subsequent Event [Member] | Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	292
Subsequent Event [Member] | System Energy [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 13,622
Non Qualified Pension Plans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		5,900	$ 6,900	23,300	$ 16,000
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		1,400	2,500	9,200	2,500
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		69	86	212	266
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		24	192	77	280
Defined Benefit Plan, Benefit Obligation, Payment for Settlement			155		155
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		80	91	241	283
Defined Benefit Plan, Benefit Obligation, Payment for Settlement				2
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		28	7	84	23
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		961	115	1,264	345
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		886	3	1,000	3
Pension Plans Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		162,291	95,173	273,676	373,829
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(125,548)	(44,718)	(148,201)	(156,266)
Pension Plans Defined Benefit [Member] | Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		21,033	20,115	53,160	74,508
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(11,477)	(7,238)	(22,973)	(31,624)
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		43,861	25,444	70,355	91,702
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(33,507)	(13,209)	(37,968)	(48,201)
Pension Plans Defined Benefit [Member] | Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		10,124	7,568	19,074	24,822
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(6,853)	(3,685)	(9,061)	(11,447)
Pension Plans Defined Benefit [Member] | Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		5,181	1,976	6,669	8,314
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(4,402)	(1,107)	(4,402)	(4,691)
Pension Plans Defined Benefit [Member] | Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		14,897	3,001	20,172	13,803
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(13,082)	(1,634)	(15,547)	(8,261)
Pension Plans Defined Benefit [Member] | System Energy [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Net other postretirement benefit cost		7,498	7,888	15,527	22,146
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		$ (4,593)	$ (4,086)	$ (6,616)	$ (8,725)