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Revenue Recognition Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Table Text Block]                 Entergy’s total revenues for the years ended December 31, 2020 and 2019 are as follows:
20202019
(In Thousands)
Utility:
Residential$3,550,317 $3,531,500 
Commercial2,292,740 2,475,586 
Industrial2,331,170 2,541,287 
Governmental212,131 228,470 
Total billed retail8,386,358 8,776,843 
Sales for resale (a)295,810 285,722 
Other electric revenues (b)348,102 343,143 
Revenues from contracts with customers9,030,270 9,405,708 
Other revenues (c)16,373 24,270 
Total electric revenues9,046,643 9,429,978 
Natural gas124,008 153,954 
Entergy Wholesale Commodities:
Competitive businesses sales from contracts with customers (a)771,360 1,164,552 
Other revenues (c)171,625 130,189 
Total competitive businesses revenues942,985 1,294,741 
Total operating revenues$10,113,636 $10,878,673 
    
Revenue from Contract with Customer, Excluding Assessed Tax $ 2,370,101 $ 2,903,568 $ 2,412,788 $ 2,427,179 $ 2,462,305 $ 3,140,575 $ 2,666,209 $ 2,609,584 $ 10,113,636 $ 10,878,673 $ 11,009,452
Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 9,046,643 9,429,978 9,384,111
Natural Gas, US Regulated [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 124,008 153,954 156,436
Competitive Businesses [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 942,985 1,294,741 1,468,905
Residential [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 3,550,317 3,531,500  
Commercial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 2,292,740 2,475,586  
Industrial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 2,331,170 2,541,287  
Governmental [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 212,131 228,470  
Sales for Resale [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 295,810 285,722  
Other Electric [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 348,102 343,143  
Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 9,030,270 9,405,708  
Non-Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 16,373 24,270  
Non-Customer [Member] | Competitive Businesses [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 171,625 130,189  
Competitive Business Sales [Member] | Competitive Businesses [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 771,360 1,164,552  
Billed Retail [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 8,386,358 8,776,843  
Entergy Arkansas [Member]                      
Disaggregation of Revenue [Table Text Block]                
The Registrant Subsidiaries’ total revenues for the year ended December 31, 2020 were as follows:
2020Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$841,162 $1,270,187 $523,379 $243,502 $672,087 
Commercial466,273 886,548 395,875 179,406 364,638 
Industrial461,907 1,314,234 145,100 24,248 385,681 
Governmental18,011 68,901 41,955 59,819 23,445 
Total billed retail1,787,353 3,539,870 1,106,309 506,975 1,445,851 
Sales for resale (a)173,115 333,594 77,530 33,213 100,273 
Other electric revenues (b)109,642 141,004 54,590 8,294 39,981 
Revenues from contracts with customers2,070,110 4,014,468 1,238,429 548,482 1,586,105 
Other revenues (c)14,384 4,595 9,425 12,150 1,020 
Total electric revenues2,084,494 4,019,063 1,247,854 560,632 1,587,125 
Natural gas— 50,799 — 73,209 — 
Total operating revenues$2,084,494 $4,069,862 $1,247,854 $633,841 $1,587,125 

The Registrant Subsidiaries’ total revenues for the year ended December 31, 2019 were as follows:
2019Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$795,269 $1,270,478 $562,219 $245,081 $658,453 
Commercial538,850 947,412 444,173 202,138 343,013 
Industrial520,958 1,450,966 164,491 31,824 373,048 
Governmental20,795 71,046 44,300 70,865 21,464 
Total billed retail1,875,872 3,739,902 1,215,183 549,908 1,395,978 
Sales for resale (a)257,864 333,395 39,295 38,626 59,074 
Other electric revenues (b)112,618 135,783 58,269 9,842 32,424 
Revenues from contracts with customers2,246,354 4,209,080 1,312,747 598,376 1,487,476 
Other revenues (c)13,240 13,947 10,296 (3,959)1,479 
Total electric revenues2,259,594 4,223,027 1,323,043 594,417 1,488,955 
Natural gas— 62,148 — 91,806 — 
Total operating revenues$2,259,594 $4,285,175 $1,323,043 $686,223 $1,488,955 
    
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 2,084,494 2,259,594  
Entergy Arkansas [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax 466,426 644,389 491,767 481,912 483,327 687,526 542,929 545,812 2,084,494 2,259,594 2,060,643
Entergy Arkansas [Member] | Natural Gas, US Regulated [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 0 0  
Entergy Arkansas [Member] | Residential [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 841,162 795,269  
Entergy Arkansas [Member] | Commercial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 466,273 538,850  
Entergy Arkansas [Member] | Industrial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 461,907 520,958  
Entergy Arkansas [Member] | Governmental [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 18,011 20,795  
Entergy Arkansas [Member] | Sales for Resale [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 173,115 257,864  
Entergy Arkansas [Member] | Other Electric [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 109,642 112,618  
Entergy Arkansas [Member] | Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 2,070,110 2,246,354  
Entergy Arkansas [Member] | Non-Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 14,384 13,240  
Entergy Arkansas [Member] | Billed Retail [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 1,787,353 1,875,872  
Entergy Louisiana [Member]                      
Disaggregation of Revenue [Table Text Block]                
The Registrant Subsidiaries’ total revenues for the year ended December 31, 2020 were as follows:
2020Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$841,162 $1,270,187 $523,379 $243,502 $672,087 
Commercial466,273 886,548 395,875 179,406 364,638 
Industrial461,907 1,314,234 145,100 24,248 385,681 
Governmental18,011 68,901 41,955 59,819 23,445 
Total billed retail1,787,353 3,539,870 1,106,309 506,975 1,445,851 
Sales for resale (a)173,115 333,594 77,530 33,213 100,273 
Other electric revenues (b)109,642 141,004 54,590 8,294 39,981 
Revenues from contracts with customers2,070,110 4,014,468 1,238,429 548,482 1,586,105 
Other revenues (c)14,384 4,595 9,425 12,150 1,020 
Total electric revenues2,084,494 4,019,063 1,247,854 560,632 1,587,125 
Natural gas— 50,799 — 73,209 — 
Total operating revenues$2,084,494 $4,069,862 $1,247,854 $633,841 $1,587,125 

The Registrant Subsidiaries’ total revenues for the year ended December 31, 2019 were as follows:
2019Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$795,269 $1,270,478 $562,219 $245,081 $658,453 
Commercial538,850 947,412 444,173 202,138 343,013 
Industrial520,958 1,450,966 164,491 31,824 373,048 
Governmental20,795 71,046 44,300 70,865 21,464 
Total billed retail1,875,872 3,739,902 1,215,183 549,908 1,395,978 
Sales for resale (a)257,864 333,395 39,295 38,626 59,074 
Other electric revenues (b)112,618 135,783 58,269 9,842 32,424 
Revenues from contracts with customers2,246,354 4,209,080 1,312,747 598,376 1,487,476 
Other revenues (c)13,240 13,947 10,296 (3,959)1,479 
Total electric revenues2,259,594 4,223,027 1,323,043 594,417 1,488,955 
Natural gas— 62,148 — 91,806 — 
Total operating revenues$2,259,594 $4,285,175 $1,323,043 $686,223 $1,488,955 
    
Revenue from Contract with Customer, Excluding Assessed Tax 1,007,541 1,120,022 1,011,652 930,647 987,851 1,231,677 1,106,317 959,330 $ 4,069,862 4,285,175 4,296,320
Entergy Louisiana [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 4,019,063 4,223,027 4,232,541
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 50,799 62,148 63,779
Entergy Louisiana [Member] | Residential [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 1,270,187 1,270,478  
Entergy Louisiana [Member] | Commercial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 886,548 947,412  
Entergy Louisiana [Member] | Industrial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 1,314,234 1,450,966  
Entergy Louisiana [Member] | Governmental [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 68,901 71,046  
Entergy Louisiana [Member] | Sales for Resale [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 333,594 333,395  
Entergy Louisiana [Member] | Other Electric [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 141,004 135,783  
Entergy Louisiana [Member] | Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 4,014,468 4,209,080  
Entergy Louisiana [Member] | Non-Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 4,595 13,947  
Entergy Louisiana [Member] | Billed Retail [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 3,539,870 3,739,902  
Entergy Mississippi [Member]                      
Disaggregation of Revenue [Table Text Block]                
The Registrant Subsidiaries’ total revenues for the year ended December 31, 2020 were as follows:
2020Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$841,162 $1,270,187 $523,379 $243,502 $672,087 
Commercial466,273 886,548 395,875 179,406 364,638 
Industrial461,907 1,314,234 145,100 24,248 385,681 
Governmental18,011 68,901 41,955 59,819 23,445 
Total billed retail1,787,353 3,539,870 1,106,309 506,975 1,445,851 
Sales for resale (a)173,115 333,594 77,530 33,213 100,273 
Other electric revenues (b)109,642 141,004 54,590 8,294 39,981 
Revenues from contracts with customers2,070,110 4,014,468 1,238,429 548,482 1,586,105 
Other revenues (c)14,384 4,595 9,425 12,150 1,020 
Total electric revenues2,084,494 4,019,063 1,247,854 560,632 1,587,125 
Natural gas— 50,799 — 73,209 — 
Total operating revenues$2,084,494 $4,069,862 $1,247,854 $633,841 $1,587,125 

The Registrant Subsidiaries’ total revenues for the year ended December 31, 2019 were as follows:
2019Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$795,269 $1,270,478 $562,219 $245,081 $658,453 
Commercial538,850 947,412 444,173 202,138 343,013 
Industrial520,958 1,450,966 164,491 31,824 373,048 
Governmental20,795 71,046 44,300 70,865 21,464 
Total billed retail1,875,872 3,739,902 1,215,183 549,908 1,395,978 
Sales for resale (a)257,864 333,395 39,295 38,626 59,074 
Other electric revenues (b)112,618 135,783 58,269 9,842 32,424 
Revenues from contracts with customers2,246,354 4,209,080 1,312,747 598,376 1,487,476 
Other revenues (c)13,240 13,947 10,296 (3,959)1,479 
Total electric revenues2,259,594 4,223,027 1,323,043 594,417 1,488,955 
Natural gas— 62,148 — 91,806 — 
Total operating revenues$2,259,594 $4,285,175 $1,323,043 $686,223 $1,488,955 
    
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 1,247,854 1,323,043  
Entergy Mississippi [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax 299,482 356,496 297,954 293,922 339,330 398,732 302,737 282,244 1,247,854 1,323,043 1,335,112
Entergy Mississippi [Member] | Natural Gas, US Regulated [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 0 0  
Entergy Mississippi [Member] | Residential [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 523,379 562,219  
Entergy Mississippi [Member] | Commercial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 395,875 444,173  
Entergy Mississippi [Member] | Industrial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 145,100 164,491  
Entergy Mississippi [Member] | Governmental [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 41,955 44,300  
Entergy Mississippi [Member] | Sales for Resale [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 77,530 39,295  
Entergy Mississippi [Member] | Other Electric [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 54,590 58,269  
Entergy Mississippi [Member] | Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 1,238,429 1,312,747  
Entergy Mississippi [Member] | Non-Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 9,425 10,296  
Entergy Mississippi [Member] | Billed Retail [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 1,106,309 1,215,183  
Entergy New Orleans [Member]                      
Disaggregation of Revenue [Table Text Block]                
The Registrant Subsidiaries’ total revenues for the year ended December 31, 2020 were as follows:
2020Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$841,162 $1,270,187 $523,379 $243,502 $672,087 
Commercial466,273 886,548 395,875 179,406 364,638 
Industrial461,907 1,314,234 145,100 24,248 385,681 
Governmental18,011 68,901 41,955 59,819 23,445 
Total billed retail1,787,353 3,539,870 1,106,309 506,975 1,445,851 
Sales for resale (a)173,115 333,594 77,530 33,213 100,273 
Other electric revenues (b)109,642 141,004 54,590 8,294 39,981 
Revenues from contracts with customers2,070,110 4,014,468 1,238,429 548,482 1,586,105 
Other revenues (c)14,384 4,595 9,425 12,150 1,020 
Total electric revenues2,084,494 4,019,063 1,247,854 560,632 1,587,125 
Natural gas— 50,799 — 73,209 — 
Total operating revenues$2,084,494 $4,069,862 $1,247,854 $633,841 $1,587,125 

The Registrant Subsidiaries’ total revenues for the year ended December 31, 2019 were as follows:
2019Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$795,269 $1,270,478 $562,219 $245,081 $658,453 
Commercial538,850 947,412 444,173 202,138 343,013 
Industrial520,958 1,450,966 164,491 31,824 373,048 
Governmental20,795 71,046 44,300 70,865 21,464 
Total billed retail1,875,872 3,739,902 1,215,183 549,908 1,395,978 
Sales for resale (a)257,864 333,395 39,295 38,626 59,074 
Other electric revenues (b)112,618 135,783 58,269 9,842 32,424 
Revenues from contracts with customers2,246,354 4,209,080 1,312,747 598,376 1,487,476 
Other revenues (c)13,240 13,947 10,296 (3,959)1,479 
Total electric revenues2,259,594 4,223,027 1,323,043 594,417 1,488,955 
Natural gas— 62,148 — 91,806 — 
Total operating revenues$2,259,594 $4,285,175 $1,323,043 $686,223 $1,488,955 
    
Revenue from Contract with Customer, Excluding Assessed Tax 155,132 182,064 147,343 149,302 153,032 194,204 175,793 163,194 $ 633,841 686,223 717,390
Entergy New Orleans [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 560,632 594,417 624,733
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 73,209 91,806 92,657
Entergy New Orleans [Member] | Residential [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 243,502 245,081  
Entergy New Orleans [Member] | Commercial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 179,406 202,138  
Entergy New Orleans [Member] | Industrial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 24,248 31,824  
Entergy New Orleans [Member] | Governmental [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 59,819 70,865  
Entergy New Orleans [Member] | Sales for Resale [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 33,213 38,626  
Entergy New Orleans [Member] | Other Electric [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 8,294 9,842  
Entergy New Orleans [Member] | Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 548,482 598,376  
Entergy New Orleans [Member] | Non-Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 12,150 (3,959)  
Entergy New Orleans [Member] | Billed Retail [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 506,975 549,908  
Entergy Texas [Member]                      
Disaggregation of Revenue [Table Text Block]                
The Registrant Subsidiaries’ total revenues for the year ended December 31, 2020 were as follows:
2020Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$841,162 $1,270,187 $523,379 $243,502 $672,087 
Commercial466,273 886,548 395,875 179,406 364,638 
Industrial461,907 1,314,234 145,100 24,248 385,681 
Governmental18,011 68,901 41,955 59,819 23,445 
Total billed retail1,787,353 3,539,870 1,106,309 506,975 1,445,851 
Sales for resale (a)173,115 333,594 77,530 33,213 100,273 
Other electric revenues (b)109,642 141,004 54,590 8,294 39,981 
Revenues from contracts with customers2,070,110 4,014,468 1,238,429 548,482 1,586,105 
Other revenues (c)14,384 4,595 9,425 12,150 1,020 
Total electric revenues2,084,494 4,019,063 1,247,854 560,632 1,587,125 
Natural gas— 50,799 — 73,209 — 
Total operating revenues$2,084,494 $4,069,862 $1,247,854 $633,841 $1,587,125 

The Registrant Subsidiaries’ total revenues for the year ended December 31, 2019 were as follows:
2019Entergy
Arkansas		Entergy
Louisiana		Entergy
Mississippi		Entergy
New
Orleans		Entergy
Texas
(In Thousands)
Residential$795,269 $1,270,478 $562,219 $245,081 $658,453 
Commercial538,850 947,412 444,173 202,138 343,013 
Industrial520,958 1,450,966 164,491 31,824 373,048 
Governmental20,795 71,046 44,300 70,865 21,464 
Total billed retail1,875,872 3,739,902 1,215,183 549,908 1,395,978 
Sales for resale (a)257,864 333,395 39,295 38,626 59,074 
Other electric revenues (b)112,618 135,783 58,269 9,842 32,424 
Revenues from contracts with customers2,246,354 4,209,080 1,312,747 598,376 1,487,476 
Other revenues (c)13,240 13,947 10,296 (3,959)1,479 
Total electric revenues2,259,594 4,223,027 1,323,043 594,417 1,488,955 
Natural gas— 62,148 — 91,806 — 
Total operating revenues$2,259,594 $4,285,175 $1,323,043 $686,223 $1,488,955 
    
Revenue from Contract with Customer, Excluding Assessed Tax                 $ 1,587,125 1,488,955  
Entergy Texas [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax 380,673 494,922 372,194 339,336 342,024 442,877 363,580 340,474 1,587,125 1,488,955 1,605,902
Entergy Texas [Member] | Natural Gas, US Regulated [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 0 0  
Entergy Texas [Member] | Residential [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 672,087 658,453  
Entergy Texas [Member] | Commercial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 364,638 343,013  
Entergy Texas [Member] | Industrial [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 385,681 373,048  
Entergy Texas [Member] | Governmental [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 23,445 21,464  
Entergy Texas [Member] | Sales for Resale [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 100,273 59,074  
Entergy Texas [Member] | Other Electric [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 39,981 32,424  
Entergy Texas [Member] | Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 1,586,105 1,487,476  
Entergy Texas [Member] | Non-Customer [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 1,020 1,479  
Entergy Texas [Member] | Billed Retail [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax                 1,445,851 1,395,978  
System Energy [Member] | Electricity [Member]                      
Revenue from Contract with Customer, Excluding Assessed Tax $ 90,228 $ 148,517 $ 126,049 $ 130,664 $ 148,825 $ 145,472 $ 139,009 $ 140,104 $ 495,458 $ 573,410 $ 456,707