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Retirement, Other Postretirement Benefits, And Defined Contribution Plans Schedule Of Benefit Obligations, Plan Assets, Funded Status, Amounts Recognized In The Balance Sheet (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amounts recognized in the balance sheet      
Current liabilities $ (68,336) $ (61,815)  
Non-current liabilities (1,949,325) (2,853,013)  
Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 1,181,075 1,252,903  
Service cost 26,578 24,500 $ 18,699
Interest cost 21,278 28,597 47,901
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment (3,168) (128,837)  
Actuarial (gain)/loss 20,955 80,162  
Employee contributions 22,023 37,176  
Benefits Paid (79,308) (113,786)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 249 360  
Balance at end of year 1,189,682 1,181,075 1,252,903
Change in Plan Assets      
Fair value of assets at beginning of year 737,866 686,262  
Actual return on plan assets 57,965 80,011  
Employer contributions 32,773 48,203  
Employee contributions 22,023 37,176  
Benefits Paid (79,308) (113,786)  
Fair value of assets at end of year 771,319 737,866 686,262
Funded status (418,363) (443,209)  
Amounts recognized in the balance sheet      
Current liabilities (42,000) (38,963)  
Non-current liabilities (376,363) (404,246)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax (37,693) (45,501)  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax 7,981 8,565  
Defined Benefit Plan Regulatory Liability Before Tax (45,674) (54,066)  
Amounts recognized as AOCI (before tax)      
Prior service cost (61,488) (83,581)  
Net loss 27,138 24,365  
Accumulated other comprehensive income (before taxes) (34,350) (59,216)  
Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 9,143,652 8,406,203  
Service cost 165,278 161,487  
Interest cost 191,107 239,614  
Actuarial (gain)/loss (158,276) 969,609  
Benefits Paid (932,141) (633,261)  
Balance at end of year 8,409,620 9,143,652 8,406,203
Change in Plan Assets      
Fair value of assets at beginning of year 6,854,426 6,271,160  
Actual return on plan assets 714,827 900,229  
Employer contributions 355,998 316,298  
Benefits Paid (932,141) (633,261)  
Fair value of assets at end of year 6,993,110 6,854,426 6,271,160
Funded status (1,416,510) (2,289,226)  
Amounts recognized in the balance sheet      
Non-current liabilities (1,416,510) (2,289,226)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (2,214,390) (2,926,670)  
Amounts recognized as AOCI (before tax)      
Net loss 449,756 726,010  
Entergy Arkansas [Member]      
Amounts recognized in the balance sheet      
Non-current liabilities (185,789) (361,682)  
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 209,369 185,744  
Service cost 4,135 3,626 2,363
Interest cost 3,726 4,712 7,226
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment (85) 12,320  
Actuarial (gain)/loss 14,323 18,257  
Employee contributions 5,637 7,792  
Benefits Paid (15,954) (23,141)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 32 59  
Balance at end of year 221,183 209,369 185,744
Change in Plan Assets      
Fair value of assets at beginning of year 304,192 284,224  
Actual return on plan assets 22,387 33,116  
Employer contributions   2,201  
Defined Benefit Plan Refund to Employer (767)    
Employee contributions 5,637 7,792  
Benefits Paid (15,954) (23,141)  
Fair value of assets at end of year 315,495 304,192 284,224
Funded status 94,312 94,823  
Amounts recognized in the balance sheet      
Current liabilities 0 0  
Assets for Plan Benefits, Defined Benefit Plan 94,312 94,823  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax 8,691 7,655  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax 6,797 16,557  
Defined Benefit Plan Regulatory Liability Before Tax (1,894) (8,902)  
Amounts recognized as AOCI (before tax)      
Prior service cost 0 0  
Net loss 0 0  
Accumulated other comprehensive income (before taxes) 0 0  
Entergy Arkansas [Member] | Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 1,739,382 1,615,084  
Service cost 28,632 26,329  
Interest cost 35,683 44,165  
Actuarial (gain)/loss (41,227) 196,755  
Benefits Paid (183,124) (142,951)  
Balance at end of year 1,579,346 1,739,382 1,615,084
Change in Plan Assets      
Fair value of assets at beginning of year 1,285,856 1,200,035  
Actual return on plan assets 133,207 168,764  
Employer contributions 66,649 60,008  
Benefits Paid (183,124) (142,951)  
Fair value of assets at end of year 1,302,588 1,285,856 1,200,035
Funded status (276,758) (453,526)  
Amounts recognized in the balance sheet      
Non-current liabilities (276,758) (453,526)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (612,963) (816,002)  
Amounts recognized as AOCI (before tax)      
Net loss 0 0  
Entergy Louisiana [Member]      
Amounts recognized in the balance sheet      
Non-current liabilities (528,213) (692,728)  
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 255,571 274,175  
Service cost 6,174 5,993 4,639
Interest cost 4,520 6,216 10,664
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment 357 (23,508)  
Actuarial (gain)/loss (2,367) 8,744  
Employee contributions 5,186 8,269  
Benefits Paid (16,460) (24,395)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 50 77  
Balance at end of year 253,031 255,571 274,175
Change in Plan Assets      
Fair value of assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 11,274 16,126  
Employee contributions 5,186 8,269  
Benefits Paid (16,460) (24,395)  
Fair value of assets at end of year 0 0 0
Funded status (253,031) (255,571)  
Amounts recognized in the balance sheet      
Current liabilities (15,839) (15,580)  
Non-current liabilities (237,192) (239,991)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax 0 0  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax 0 0  
Amounts recognized as AOCI (before tax)      
Prior service cost (16,967) (22,244)  
Net loss (17,551) (15,548)  
Accumulated other comprehensive income (before taxes) (34,518) (37,792)  
Entergy Louisiana [Member] | Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 1,927,271 1,784,474  
Service cost 38,271 35,158  
Interest cost 39,740 50,432  
Actuarial (gain)/loss (28,439) 196,032  
Benefits Paid (240,447) (138,825)  
Balance at end of year 1,736,396 1,927,271 1,784,474
Change in Plan Assets      
Fair value of assets at beginning of year 1,476,306 1,364,030  
Actual return on plan assets 150,917 195,658  
Employer contributions 59,882 55,443  
Benefits Paid (240,447) (138,825)  
Fair value of assets at end of year 1,446,658 1,476,306 1,364,030
Funded status (289,738) (450,965)  
Amounts recognized in the balance sheet      
Non-current liabilities (289,738) (450,965)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (556,345) (766,099)  
Amounts recognized as AOCI (before tax)      
Net loss 23,181 31,921  
Entergy Mississippi [Member]      
Amounts recognized in the balance sheet      
Non-current liabilities (59,065) (110,901)  
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 61,990 65,979  
Service cost 1,448 1,468 1,046
Interest cost 1,110 1,536 2,681
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment 0 (4,428)  
Actuarial (gain)/loss (1,335) 684  
Employee contributions 1,386 2,122  
Benefits Paid (3,604) (5,382)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 6 11  
Balance at end of year 61,001 61,990 65,979
Change in Plan Assets      
Fair value of assets at beginning of year 93,475 86,085  
Actual return on plan assets 7,024 10,307  
Employer contributions   343  
Defined Benefit Plan Refund to Employer (393)    
Employee contributions 1,386 2,122  
Benefits Paid (3,604) (5,382)  
Fair value of assets at end of year 97,888 93,475 86,085
Funded status 36,887 31,485  
Amounts recognized in the balance sheet      
Current liabilities 0 0  
Assets for Plan Benefits, Defined Benefit Plan 36,887 31,485  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax (4,109) (5,884)  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax 4,254 1,355  
Defined Benefit Plan Regulatory Liability Before Tax (8,363)    
Amounts recognized as AOCI (before tax)      
Prior service cost 0 0  
Net loss 0 0  
Accumulated other comprehensive income (before taxes) 0 0  
Entergy Mississippi [Member] | Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 510,109 471,510  
Service cost 9,070 8,060  
Interest cost 10,446 12,922  
Actuarial (gain)/loss (14,831) 62,564  
Benefits Paid (65,936) (44,947)  
Balance at end of year 448,858 510,109 471,510
Change in Plan Assets      
Fair value of assets at beginning of year 371,394 354,928  
Actual return on plan assets 37,251 48,812  
Employer contributions 13,715 12,601  
Benefits Paid (65,936) (44,947)  
Fair value of assets at end of year 356,424 371,394 354,928
Funded status (92,434) (138,715)  
Amounts recognized in the balance sheet      
Non-current liabilities (92,434) (138,715)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (173,511) (239,904)  
Amounts recognized as AOCI (before tax)      
Net loss 0 0  
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 31,707 38,460  
Service cost 437 445 367
Interest cost 521 784 1,581
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment 0 (5,493)  
Actuarial (gain)/loss 988 (91)  
Employee contributions 403 1,123  
Benefits Paid (2,194) (3,530)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 4 9  
Balance at end of year 31,866 31,707 38,460
Change in Plan Assets      
Fair value of assets at beginning of year 102,734 93,858  
Actual return on plan assets 10,068 10,642  
Employer contributions 126 641  
Employee contributions 403 1,123  
Benefits Paid (2,194) (3,530)  
Fair value of assets at end of year 111,137 102,734 93,858
Funded status 79,271 71,027  
Amounts recognized in the balance sheet      
Current liabilities 0 0  
Assets for Plan Benefits, Defined Benefit Plan 79,271 71,027  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax (3,814) (4,730)  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax 16,003 13,385  
Defined Benefit Plan Regulatory Liability Before Tax (19,817) (18,115)  
Amounts recognized as AOCI (before tax)      
Prior service cost 0 0  
Net loss 0 0  
Accumulated other comprehensive income (before taxes) 0 0  
Entergy New Orleans [Member] | Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 220,287 206,962  
Service cost 3,038 2,654  
Interest cost 4,392 5,825  
Actuarial (gain)/loss (9,118) 20,535  
Benefits Paid (23,219) (15,689)  
Balance at end of year 195,380 220,287 206,962
Change in Plan Assets      
Fair value of assets at beginning of year 172,551 160,777  
Actual return on plan assets 17,639 22,896  
Employer contributions 5,395 4,567  
Benefits Paid (23,219) (15,689)  
Fair value of assets at end of year 172,366 172,551 160,777
Funded status (23,014) (47,736)  
Amounts recognized in the balance sheet      
Non-current liabilities (23,014) (47,736)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (62,805) (91,991)  
Amounts recognized as AOCI (before tax)      
Net loss 0 0  
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 74,233 94,742  
Service cost 1,384 1,219 943
Interest cost 1,269 2,008 3,415
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment (3,776) (22,441)  
Actuarial (gain)/loss 4,270 5,952  
Employee contributions 1,491 2,456  
Benefits Paid (6,923) (9,721)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 13 18  
Balance at end of year 71,961 74,233 94,742
Change in Plan Assets      
Fair value of assets at beginning of year 174,096 161,810  
Actual return on plan assets 13,523 18,861  
Employer contributions 98 690  
Employee contributions 1,491 2,456  
Benefits Paid (6,923) (9,721)  
Fair value of assets at end of year 182,285 174,096 161,810
Funded status 110,324 99,863  
Amounts recognized in the balance sheet      
Current liabilities 0 0  
Assets for Plan Benefits, Defined Benefit Plan 110,324 99,863  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax (20,532) (20,498)  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (2,571) (2,030)  
Defined Benefit Plan Regulatory Liability Before Tax (17,961)    
Amounts recognized as AOCI (before tax)      
Prior service cost 0 0  
Net loss 0 0  
Accumulated other comprehensive income (before taxes) 0 0  
Entergy Texas [Member] | Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 410,664 396,764  
Service cost 6,921 6,116  
Interest cost 8,381 10,731  
Actuarial (gain)/loss (3,971) 37,579  
Benefits Paid (50,193) (40,526)  
Balance at end of year 371,802 410,664 396,764
Change in Plan Assets      
Fair value of assets at beginning of year 349,748 339,126  
Actual return on plan assets 35,405 46,151  
Employer contributions 6,955 4,997  
Benefits Paid (50,193) (40,526)  
Fair value of assets at end of year 341,915 349,748 339,126
Funded status (29,887) (60,916)  
Amounts recognized in the balance sheet      
Non-current liabilities (29,887) (60,916)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (113,790) (156,480)  
Amounts recognized as AOCI (before tax)      
Net loss 0 0  
System Energy [Member]      
Amounts recognized in the balance sheet      
Non-current liabilities (76,104) (125,412)  
System Energy [Member] | Other Postretirement Benefits Plan [Member]      
Change in APBO      
Balance at beginning of year 47,701 47,348  
Service cost 1,340 1,254 973
Interest cost 878 1,130 1,902
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment 69 (1,963)  
Actuarial (gain)/loss 1,289 3,025  
Employee contributions 1,353 1,732  
Benefits Paid (4,769) (4,851)  
Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31) 14 26  
Balance at end of year 47,875 47,701 47,348
Change in Plan Assets      
Fair value of assets at beginning of year 52,619 48,471  
Actual return on plan assets 4,235 5,925  
Employer contributions 1,212 1,342  
Employee contributions 1,353 1,732  
Benefits Paid (4,769) (4,851)  
Fair value of assets at end of year 54,650 52,619 48,471
Funded status 6,775 4,918  
Amounts recognized in the balance sheet      
Current liabilities 0 0  
Assets for Plan Benefits, Defined Benefit Plan 6,775 4,918  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan Regulatory Asset Net Prior Service Cost (Credit) Before Tax (1,249) (1,754)  
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (2,967) (2,818)  
Amounts recognized as AOCI (before tax)      
Prior service cost 0 0  
Net loss 0 0  
Accumulated other comprehensive income (before taxes) 0 0  
System Energy [Member] | Qualified Pension Obligations [Member]      
Change in APBO      
Balance at beginning of year 441,148 393,607  
Service cost 8,851 7,883  
Interest cost 9,087 11,006  
Actuarial (gain)/loss (14,746) 57,574  
Benefits Paid (49,546) (28,922)  
Balance at end of year 394,794 441,148 393,607
Change in Plan Assets      
Fair value of assets at beginning of year 310,818 282,668  
Actual return on plan assets 32,125 40,927  
Employer contributions 18,663 16,145  
Benefits Paid (49,546) (28,922)  
Fair value of assets at end of year 312,060 310,818 $ 282,668
Funded status (82,734) (130,330)  
Amounts recognized in the balance sheet      
Non-current liabilities (82,734) (130,330)  
Amounts recognized as a regulatory asset (before tax) [Abstract]      
Defined Benefit Plan, Regulatory Asset, Gain (Loss) before Tax (153,782) (212,062)  
Amounts recognized as AOCI (before tax)      
Net loss $ 0 $ 0