Retirement, Other Postretirement Benefits, And Defined Contribution Plans Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
non-current pension liability		$ 1,949,325	$ 2,853,013
Current pension liability		$ 68,336	$ 61,815
Ultimate healthcare cost trend rate		4.75%	4.75%
Defined Benefit Plan, Plan Assets, Payment for Settlement		$ (553,576)	$ (84,754)
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		165,500	161,300
Net periodic benefit costs		28,600	18,100	$ 22,600
Settlement charges related to the payment of lump sum benefits out of the plan		10,900		7,400
Projected benefit obligation		181,600	182,400
Accumulated other comprehensive income (before taxes)		17,000	16,700
Amortization of prior service credit		74,900	77,300
Defined Benefit Plan Benefit Obligation, Current		26,300	22,900
Defined Benefit Plan Benefit Obligation, Non-Current		155,300	159,500
Common Stock Issued, Employee Stock Trust		35,000
Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6,993,110	6,854,426	6,271,160
Projected benefit obligation		8,409,620	9,143,652	8,406,203
non-current pension liability		1,416,510	2,289,226
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		6,993,110	6,854,426
Accumulated pension benefit obligation		7,800,000	8,400,000
Net periodic benefit costs		471,815	373,784	276,969
Expected Employer Contributions		200,000
Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Subsidiaries' contribution to defined contribution plan		$ 62,300	63,100	57,600
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	500.00%	6.00%
Defined Contribution Plan Discretionary Employer Matching Contribution Percent	400.00%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 771,319	737,866	686,262
Net periodic benefit costs		(25,580)	(17,184)	(5,593)
Projected benefit obligation		1,189,682	1,181,075	1,252,903
non-current pension liability		376,363	404,246
Current pension liability		42,000	38,963
Accumulated other comprehensive income (before taxes)		(34,350)	(59,216)
Amortization of prior service credit		(33,069)	(32,882)	(35,377)
Expected Employer Contributions		42,800
Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
non-current pension liability		185,789	361,682
Defined Benefit Plan, Plan Assets, Payment for Settlement		(104,400)	(48,400)
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		2,482	2,626
Net periodic benefit costs		343	333	275
Projected benefit obligation		2,875	3,197
non-current pension liability		2,627	2,979
Current pension liability		248	218
Accumulated other comprehensive income (before taxes)		0	0
Entergy Arkansas [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,302,588	1,285,856	1,200,035
Projected benefit obligation		1,579,346	1,739,382	1,615,084
non-current pension liability		276,758	453,526
Entergy Arkansas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		1,463,966	1,617,858
Net periodic benefit costs		92,919	81,723	44,400
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		315,495	304,192	284,224
Net periodic benefit costs		(11,084)	(10,075)	(10,747)
Projected benefit obligation		221,183	209,369	185,744
Current pension liability		0	0
Accumulated other comprehensive income (before taxes)		0	0
Amortization of prior service credit		(1,121)	(1,849)	(4,950)
Expected Employer Contributions		517
Entergy Arkansas [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Employer Contributions		40,840
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
non-current pension liability		528,213	692,728
Defined Benefit Plan, Plan Assets, Payment for Settlement		(166,600)	(18,600)
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		1,445	1,802
Net periodic benefit costs		307	148	159
Projected benefit obligation		1,469	1,965
non-current pension liability		1,283	1,772
Current pension liability		186	193
Accumulated other comprehensive income (before taxes)		10	18
Settlement charges		155
Entergy Louisiana [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		1,446,658	1,476,306	1,364,030
Projected benefit obligation		1,736,396	1,927,271	1,784,474
non-current pension liability		289,738	450,965
Entergy Louisiana [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		1,574,273	1,753,980
Net periodic benefit costs		117,150	70,648	48,630
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		0	0	0
Net periodic benefit costs		5,410	5,583	7,259
Projected benefit obligation		253,031	255,571	274,175
non-current pension liability		237,192	239,991
Current pension liability		15,839	15,580
Accumulated other comprehensive income (before taxes)		(34,518)	(37,792)
Amortization of prior service credit		(4,920)	(6,179)	(7,349)
Expected Employer Contributions		15,845
Entergy Louisiana [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Employer Contributions		22,917
Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
non-current pension liability		59,065	110,901
Defined Benefit Plan, Plan Assets, Payment for Settlement		(45,700)	(7,700)
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		3,377	3,345
Net periodic benefit costs		365	359	326
Projected benefit obligation		3,708	3,852
non-current pension liability		3,518	3,671
Current pension liability		190	181
Accumulated other comprehensive income (before taxes)		0	0
Settlement charges				40
Entergy Mississippi [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		356,424	371,394	354,928
Projected benefit obligation		448,858	510,109	471,510
non-current pension liability		92,434	138,715
Entergy Mississippi [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		407,851	466,497
Net periodic benefit costs		33,826	20,184	11,331
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		97,888	93,475	86,085
Net periodic benefit costs		(4,677)	(3,644)	(2,100)
Projected benefit obligation		61,001	61,990	65,979
Current pension liability		0	0
Accumulated other comprehensive income (before taxes)		0	0
Amortization of prior service credit		(1,775)	(1,652)	(1,756)
Expected Employer Contributions		130
Entergy Mississippi [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Employer Contributions		12,852
Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Payment for Settlement		(14,300)
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		738	240
Net periodic benefit costs		30	31	20
Projected benefit obligation		1,069	247
non-current pension liability		1,039	230
Current pension liability		31	17
Accumulated other comprehensive income (before taxes)		0	0
Entergy New Orleans [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		172,366	172,551	160,777
Projected benefit obligation		195,380	220,287	206,962
non-current pension liability		23,014	47,736
Entergy New Orleans [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		178,010	201,159
Net periodic benefit costs		9,859	5,988	5,101
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		111,137	102,734	93,858
Net periodic benefit costs		(6,420)	(4,929)	(3,450)
Projected benefit obligation		31,866	31,707	38,460
Current pension liability		0	0
Accumulated other comprehensive income (before taxes)		0	0
Amortization of prior service credit		(916)	(763)	(682)
Expected Employer Contributions		175
Entergy New Orleans [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Employer Contributions		922
Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Payment for Settlement		(31,900)	(9,800)
Difference between rate case pension amounts and actuarially determined pension amounts		14,600
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		7,355	7,949
Net periodic benefit costs		615	469	481
Projected benefit obligation		7,462	8,475
non-current pension liability		4,382	7,842
Current pension liability		3,080	633
Accumulated other comprehensive income (before taxes)		0	0
Settlement charges		172
Entergy Texas [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		341,915	349,748	339,126
Projected benefit obligation		371,802	410,664	396,764
non-current pension liability		29,887	60,916
Entergy Texas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		342,441	379,050
Net periodic benefit costs		18,617	12,358	5,740
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		182,285	174,096	161,810
Net periodic benefit costs		(10,883)	(8,873)	(6,503)
Projected benefit obligation		71,961	74,233	94,742
Current pension liability		0	0
Accumulated other comprehensive income (before taxes)		0	0
Amortization of prior service credit		(3,742)	(3,364)	(2,243)
Expected Employer Contributions		66
Entergy Texas [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Employer Contributions		1,924
System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
non-current pension liability		76,104	125,412
Defined Benefit Plan, Plan Assets, Payment for Settlement		(33,000)	(236)
System Energy [Member] | Qualified Pension Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		312,060	310,818	282,668
Projected benefit obligation		394,794	441,148	393,607
non-current pension liability		82,734	130,330
System Energy [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation		366,920	410,296
Net periodic benefit costs		29,348	17,341	12,345
System Energy [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount		54,650	52,619	48,471
Net periodic benefit costs		(1,313)	(1,518)	(1,009)
Projected benefit obligation		47,875	47,701	47,348
Current pension liability		0	0
Accumulated other comprehensive income (before taxes)		0	0
Amortization of prior service credit		(436)	$ (1,065)	$ (1,450)
Expected Employer Contributions		22
System Energy [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Employer Contributions		$ 12,760
Minimum [Member] | Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		70.00%
Maximum [Member] | Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%	100.00%
Domestic Equity Securities [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		39.00%
Domestic Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		25.00%
Domestic Equity Securities [Member] | Minimum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		32.00%
Domestic Equity Securities [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		20.00%
Domestic Equity Securities [Member] | Maximum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		46.00%
Domestic Equity Securities [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		30.00%
International Equity Securities [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		19.00%
International Equity Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		17.00%
International Equity Securities [Member] | Minimum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		15.00%
International Equity Securities [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		12.00%
International Equity Securities [Member] | Maximum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		23.00%
International Equity Securities [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		22.00%
Fixed Income Securities [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		42.00%
Fixed Income Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		58.00%
Fixed Income Securities [Member] | Minimum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		39.00%
Fixed Income Securities [Member] | Minimum [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		53.00%
Fixed Income Securities [Member] | Maximum [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		45.00%
Fixed Income Securities [Member] | Maximum [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation		63.00%
Defined Benefit Plan Total Plan Assets | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage		10.00%
Defined Benefit Plan Total Plan Assets | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage		10.00%