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Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax $ 3,353,532 $ 2,903,568 $ 9,020,440 $ 7,743,534
Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 722,683 644,389 1,856,343 1,618,068
Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,420,708 1,120,022 3,795,950 3,062,321
Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 420,319 356,496 1,105,978 948,372
Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 211,229 182,064 559,304 478,709
Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 541,632 494,922 1,452,286 1,206,452
Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 3,159,969 2,666,805 8,339,764 6,907,999
Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 722,683 644,389 1,856,343 1,618,068
Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,407,737 1,110,217 3,741,979 3,024,359
Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 420,319 356,496 1,105,978 948,372
Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 192,946 169,512 491,855 427,842
Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 541,632 494,922 1,452,286 1,206,452
Natural Gas, US Regulated [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 31,254 22,357 121,420 88,829
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 12,971 9,805 53,971 37,962
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 18,283 12,552 67,449 50,867
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 162,309 214,406 559,256 746,706
Residential [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,291,645 1,153,220 3,114,084 2,742,118
Residential [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 294,797 274,496 703,081 665,355
Residential [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 477,025 413,442 1,153,428 974,407
Residential [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 184,479 161,031 449,576 400,495
Residential [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 85,974 83,242 212,586 187,561
Residential [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 249,370 221,009 595,413 514,300
Commercial [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 756,903 647,119 1,958,284 1,712,179
Commercial [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 149,952 137,764 367,556 355,112
Commercial [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 300,255 248,276 787,255 659,641
Commercial [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 131,472 109,432 331,052 295,823
Commercial [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 57,563 50,565 156,454 132,470
Commercial [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 117,661 101,082 315,967 269,133
Industrial [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 814,685 589,648 2,169,295 1,723,367
Industrial [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 155,714 138,037 373,410 345,378
Industrial [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 477,439 316,876 1,299,633 974,419
Industrial [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 40,671 34,062 111,195 106,327
Industrial [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 8,574 7,219 23,391 17,632
Industrial [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 132,287 93,454 361,666 279,611
Governmental [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 66,167 56,710 184,576 156,251
Governmental [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 5,747 5,133 14,538 13,508
Governmental [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 21,448 17,449 61,611 50,984
Governmental [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 13,110 10,917 34,526 31,043
Governmental [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 20,016 17,187 54,708 43,512
Governmental [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 5,846 6,024 19,193 17,204
Billed Retail [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 2,929,400 2,446,697 7,426,239 6,333,915
Billed Retail [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 606,210 555,430 1,458,585 1,379,353
Billed Retail [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,276,167 996,043 3,301,927 2,659,451
Billed Retail [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 369,732 315,442 926,349 833,688
Billed Retail [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 172,127 158,213 447,139 381,175
Billed Retail [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 505,164 421,569 1,292,239 1,080,248
Sales for Resale [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 135,220 145,187 459,425 251,674
Sales for Resale [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 76,576 64,494 256,411 142,590
Sales for Resale [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 98,830 81,843 253,600 243,071
Sales for Resale [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 35,199 29,535 119,559 62,383
Sales for Resale [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 23,290 9,057 40,796 27,245
Sales for Resale [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 25,329 67,643 118,944 89,459
Non-Customer [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 14,006 5,799 105,417 34,401
Non-Customer [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 6,777 6,788 15,435 13,314
Non-Customer [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 4,950 (2,766) 59,008 1,628
Non-Customer [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,699 1,907 6,041 6,853
Non-Customer [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 787 (161) 1,026 12,256
Non-Customer [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (216) 25 (1,358) 319
Non-Customer [Member] | Competitive Businesses [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 3,701 19,222 21,854 159,800
Other Electric [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 81,343 69,122 348,683 288,009
Other Electric [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 33,120 17,677 125,912 82,811
Other Electric [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 27,790 35,097 127,444 120,209
Other Electric [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 13,689 9,612 54,029 45,448
Other Electric [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (3,258) 2,403 2,894 7,166
Other Electric [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 11,355 5,685 42,461 36,426
Revenues from customers [Member] | Electricity [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 3,145,963 2,661,006 8,234,347 6,873,598
Revenues from customers [Member] | Electricity [Member] | Entergy Arkansas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 715,906 637,601 1,840,908 1,604,754
Revenues from customers [Member] | Electricity [Member] | Entergy Louisiana [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,402,787 1,112,983 3,682,971 3,022,731
Revenues from customers [Member] | Electricity [Member] | Entergy Mississippi [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 418,620 354,589 1,099,937 941,519
Revenues from customers [Member] | Electricity [Member] | Entergy New Orleans [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 192,159 169,673 490,829 415,586
Revenues from customers [Member] | Electricity [Member] | Entergy Texas [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 541,848 494,897 1,453,644 1,206,133
Competitive Business Sales [Member] | Competitive Businesses [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax $ 158,608 $ 195,184 $ 537,402 $ 586,906