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Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax $ 2,822,070 $ 2,412,788 $ 5,666,907 $ 4,839,967
Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 550,274 491,767 1,133,660 973,679
Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,267,598 1,011,652 2,375,242 1,942,299
Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 349,040 297,954 685,659 591,876
Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 178,740 147,343 348,075 296,645
Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 430,434 372,194 910,654 711,530
Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 2,641,375 2,190,557 5,179,794 4,241,196
Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 550,274 491,767 1,133,660 973,679
Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,254,579 1,001,601 2,334,242 1,914,142
Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 349,040 297,954 685,659 591,876
Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 159,761 134,899 298,909 258,330
Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 430,434 372,194 910,654 711,530
Natural Gas, US Regulated [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 31,998 22,495 90,166 66,471
Natural Gas, US Regulated [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0 0
Natural Gas, US Regulated [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 13,019 10,051 41,000 28,157
Natural Gas, US Regulated [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0 0
Natural Gas, US Regulated [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 18,979 12,444 49,166 38,315
Natural Gas, US Regulated [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0 0 0 0
Competitive Businesses [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 148,697 199,736 396,947 532,300
Residential [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 855,586 790,869 1,822,441 1,588,897
Residential [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 171,103 171,171 408,284 390,859
Residential [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 340,643 301,105 676,403 560,965
Residential [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 117,461 112,361 265,097 239,463
Residential [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 60,186 53,420 126,613 104,319
Residential [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 166,193 152,811 346,044 293,291
Commercial [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 628,703 526,121 1,201,380 1,065,061
Commercial [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 111,187 106,104 217,603 217,349
Commercial [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 262,351 209,119 487,000 411,365
Commercial [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 101,644 89,594 199,580 186,392
Commercial [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 51,092 36,401 98,891 81,905
Commercial [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 102,429 84,904 198,306 168,050
Industrial [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 756,959 576,203 1,354,610 1,133,718
Industrial [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 114,284 106,254 217,696 207,342
Industrial [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 475,185 335,201 822,194 657,542
Industrial [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 36,545 35,874 70,524 72,264
Industrial [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 8,028 3,066 14,817 10,413
Industrial [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 122,917 95,809 229,379 186,157
Governmental [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 61,612 46,959 118,409 99,541
Governmental [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 4,536 4,344 8,791 8,374
Governmental [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 21,547 16,781 40,163 33,535
Governmental [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 10,873 9,798 21,416 20,125
Governmental [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 18,312 10,475 34,692 26,326
Governmental [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 6,344 5,560 13,347 11,180
Billed Retail [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 2,302,860 1,940,152 4,496,840 3,887,217
Billed Retail [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 401,110 387,873 852,374 823,924
Billed Retail [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,099,726 862,206 2,025,760 1,663,407
Billed Retail [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 266,523 247,627 556,617 518,244
Billed Retail [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 137,618 103,362 275,013 222,963
Billed Retail [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 397,883 339,084 787,076 658,678
Sales for Resale [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 119,130 52,761 324,205 106,487
Sales for Resale [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 69,750 36,956 179,834 78,096
Sales for Resale [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 74,343 82,698 154,771 161,228
Sales for Resale [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 44,050 18,426 84,360 32,848
Sales for Resale [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 12,810 8,018 17,506 18,188
Sales for Resale [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 19,542 13,187 93,615 21,815
Non-Customer [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 32,307 28,923 91,410 28,605
Non-Customer [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 6,205 3,401 8,661 6,525
Non-Customer [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 24,765 3,593 54,057 4,394
Non-Customer [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 2,077 2,508 4,341 4,948
Non-Customer [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (177) 19,520 239 12,416
Non-Customer [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (568) (116) (1,143) 295
Non-Customer [Member] | Competitive Businesses [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 2,017 24,016 18,153 140,577
Other Electric [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 187,078 168,721 267,339 218,887
Other Electric [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 73,209 63,537 92,791 65,134
Other Electric [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 55,745 53,104 99,654 85,113
Other Electric [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 36,390 29,393 40,341 35,836
Other Electric [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 9,510 3,999 6,151 4,763
Other Electric [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 13,577 20,039 31,106 30,742
Revenues from customers [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 2,609,068 2,161,634 5,088,384 4,212,591
Revenues from customers [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 544,069 488,366 1,124,999 967,154
Revenues from customers [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,229,814 998,008 2,280,185 1,909,748
Revenues from customers [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 346,963 295,446 681,318 586,928
Revenues from customers [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 159,938 115,379 298,670 245,914
Revenues from customers [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 431,002 372,310 911,797 711,235
Competitive Business Sales [Member] | Competitive Businesses [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax $ 146,680 $ 175,720 $ 378,794 $ 391,723