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Retirement, Other Postretirement Benefits, And Defined Contribution Plans Schedule Of Net Periodic Pension Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period $ 26,578 $ 24,500 $ 18,699
Interest cost 21,278 28,597 47,901
Expected return on assets (43,220) (40,880) (38,246)
Amortization of prior service credit (33,069) (32,882) (35,377)
Recognized net loss 2,853 3,481 1,430
Net periodic pension costs (25,580) (17,184) (5,593)
Prior service credit for period (3,168) (128,837) 0
Net (gain)/loss 6,210 41,031 (38,526)
Amortization of prior service cost/(credit) 33,069 32,882 35,377
Amortization of net loss 2,853 3,481 1,430
Total 33,258 (58,405) (4,579)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) 7,678 (75,589) (10,172)
Non-Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 165,500 161,300  
Amortization of prior service credit 74,900 77,300  
Net periodic pension costs 28,600 18,100 22,600
Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 7,800,000 8,400,000  
Service cost - benefits earned during the period 165,278 161,487 134,193
Interest cost 191,107 239,614 293,114
Expected return on assets (424,572) (414,273) (414,947)
Recognized net loss 334,124 350,010 241,117
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (205,878) (36,946) (23,492)
Net periodic pension costs 471,815 373,784 276,969
Net (gain)/loss (448,532) 483,653 614,600
Amortization of net loss (334,124) (358,473) (241,117)
Total (988,534) 88,234 349,991
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (516,719) 462,018 626,960
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period 4,135 3,626 2,363
Interest cost 3,726 4,712 7,226
Expected return on assets (18,020) (17,104) (15,962)
Amortization of prior service credit (1,121) (1,849) (4,950)
Recognized net loss 196 540 576
Net periodic pension costs (11,084) (10,075) (10,747)
Prior service credit for period 85 (12,320)  
Net (gain)/loss 9,956 2,245 (26,707)
Amortization of prior service cost/(credit) 1,121 1,849 4,950
Amortization of net loss 196 540 576
Total 10,796 15,874 (22,333)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (288) 5,799 (33,080)
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 2,482 2,626  
Net periodic pension costs 343 333 275
Entergy Arkansas [Member] | Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 1,463,966 1,617,858  
Service cost - benefits earned during the period 28,632 26,329 21,043
Interest cost 35,683 44,165 56,701
Expected return on assets (78,368) (78,187) (80,705)
Recognized net loss 69,290 68,338 47,361
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (37,682) (21,078)  
Net periodic pension costs 92,919 81,723 44,400
Net (gain)/loss (96,066) 106,178 118,898
Amortization of net loss (69,290) (69,713) 47,361
Total (203,038) 15,387 71,537
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (110,119) 97,110 115,937
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period 6,174 5,993 4,639
Interest cost 4,520 6,216 10,664
Expected return on assets 0 0 0
Amortization of prior service credit (4,920) (6,179) (7,349)
Recognized net loss (364) (447) (695)
Net periodic pension costs 5,410 5,583 7,259
Prior service credit for period (357) 23,508  
Net (gain)/loss (2,367) 8,744 (2,220)
Amortization of prior service cost/(credit) 4,920 6,179 7,349
Amortization of net loss (364) (447) (695)
Total 3,274 (8,138) 5,824
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) 8,684 (2,555) 13,083
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 1,445 1,802  
Net periodic pension costs 307 148 159
Entergy Louisiana [Member] | Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 1,574,273 1,753,980  
Service cost - benefits earned during the period 38,271 35,158 29,137
Interest cost 39,740 50,432 63,529
Expected return on assets (89,821) (89,691) (90,607)
Recognized net loss 67,015 66,640 46,571
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (61,945) (8,109)  
Net periodic pension costs 117,150 70,648 48,630
Net (gain)/loss (89,534) 90,064 99,346
Amortization of net loss (67,015) (68,248) 46,571
Total (218,494) 13,707 52,775
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (101,344) 84,355 101,405
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period 1,448 1,468 1,046
Interest cost 1,110 1,536 2,681
Expected return on assets (5,536) (5,167) (4,794)
Amortization of prior service credit (1,775) (1,652) (1,756)
Recognized net loss 76 171 723
Net periodic pension costs (4,677) (3,644) (2,100)
Prior service credit for period 0 4,428  
Net (gain)/loss (2,823) (4,456) (11,950)
Amortization of prior service cost/(credit) 1,775 1,652 1,756
Amortization of net loss 76 171 723
Total (1,124) (7,403) (10,917)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (5,801) (11,047) (13,017)
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 3,377 3,345  
Net periodic pension costs 365 359 326
Entergy Mississippi [Member] | Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 407,851 466,497  
Service cost - benefits earned during the period 9,070 8,060 6,516
Interest cost 10,446 12,922 16,272
Expected return on assets (22,407) (23,147) (23,873)
Recognized net loss 20,007 18,983 12,416
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (16,710) (3,366)  
Net periodic pension costs 33,826 20,184 11,331
Net (gain)/loss (29,675) 36,899 41,088
Amortization of net loss (20,007) (19,393) 12,416
Total (66,392) 14,140 28,672
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (32,566) 34,324 40,003
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period 437 445 367
Interest cost 521 784 1,581
Expected return on assets (5,750) (5,382) (4,947)
Amortization of prior service credit (916) (763) (682)
Recognized net loss (712) (13) 231
Net periodic pension costs (6,420) (4,929) (3,450)
Prior service credit for period 0 5,493  
Net (gain)/loss (3,330) (5,351) (10,967)
Amortization of prior service cost/(credit) 916 763 682
Amortization of net loss (712) (13) 231
Total (1,702) (10,068) (10,516)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (8,122) (14,997) (13,966)
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 738 240  
Net periodic pension costs 30 31 20
Entergy New Orleans [Member] | Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 178,010 201,159  
Service cost - benefits earned during the period 3,038 2,654 2,274
Interest cost 4,392 5,825 7,495
Expected return on assets (10,598) (10,509) (10,785)
Recognized net loss 7,596 8,018 6,117
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (5,431) 0  
Net periodic pension costs 9,859 5,988 5,101
Net (gain)/loss (16,159) 8,148 6,531
Amortization of net loss (7,596) (8,213) 6,117
Total (29,186) (65) 414
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (19,327) 5,923 5,515
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period 1,384 1,219 943
Interest cost 1,269 2,008 3,415
Expected return on assets (10,192) (9,643) (9,103)
Amortization of prior service credit (3,742) (3,364) (2,243)
Recognized net loss 398 907 485
Net periodic pension costs (10,883) (8,873) (6,503)
Prior service credit for period 3,776 22,441  
Net (gain)/loss 939 (3,266) (6,406)
Amortization of prior service cost/(credit) 3,742 3,364 2,243
Amortization of net loss 398 907 485
Total 507 (23,250) (4,648)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (10,376) (32,123) (11,151)
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 7,355 7,949  
Net periodic pension costs 615 469 481
Entergy Texas [Member] | Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 342,441 379,050  
Service cost - benefits earned during the period 6,921 6,116 5,401
Interest cost 8,381 10,731 14,451
Expected return on assets (21,158) (21,951) (23,447)
Recognized net loss 12,676 13,173 9,335
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (11,797) (4,289)  
Net periodic pension costs 18,617 12,358 5,740
Net (gain)/loss (18,217) 13,379 10,869
Amortization of net loss (12,676) (13,564) 9,335
Total (42,690) (4,474) 1,534
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (24,073) 7,884 7,274
System Energy [Member] | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the period 1,340 1,254 973
Interest cost 878 1,130 1,902
Expected return on assets (3,156) (2,958) (2,788)
Amortization of prior service credit (436) (1,065) (1,450)
Recognized net loss 61 121 354
Net periodic pension costs (1,313) (1,518) (1,009)
Prior service credit for period (69) 1,963  
Net (gain)/loss 210 58 (5,539)
Amortization of prior service cost/(credit) 436 1,065 1,450
Amortization of net loss 61 121 354
Total 654 (961) (4,443)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) (659) (2,479) (5,452)
System Energy [Member] | Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated pension benefit obligation 366,920 410,296  
Service cost - benefits earned during the period 8,851 7,883 6,199
Interest cost 9,087 11,006 13,456
Expected return on assets (19,254) (18,757) (18,710)
Recognized net loss 18,404 17,104 11,400
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement (12,260) (105)  
Net periodic pension costs 29,348 17,341 12,345
Net (gain)/loss (27,617) 35,403 36,711
Amortization of net loss (18,404) (17,434) 11,400
Total (58,281) 17,864 25,311
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax) $ (28,933) $ 35,205 $ 37,656