Schedule II - Valuation And Qualifying Accounts (Details) - Allowance for Doubtful Accounts Receivable [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		$ 13,587	$ 11,924	$ 39,895
Additions Charged to Income or Regulatory Assets		3,936	4,211	7,505
Other Changes Deductions from Provisions	[1]	(10,201)	(2,548)	(35,476)
Balance at End of Period		7,322	13,587	11,924
Entergy Arkansas [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		1,063	1,211	34,226
Additions Charged to Income or Regulatory Assets		810	503	902
Other Changes Deductions from Provisions	[1]	(609)	(651)	(33,917)
Balance at End of Period		1,264	1,063	1,211
Entergy Louisiana [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		8,430	6,277	4,209
Additions Charged to Income or Regulatory Assets		2,395	3,108	2,942
Other Changes Deductions from Provisions	[1]	(9,012)	(955)	(874)
Balance at End of Period		1,813	8,430	6,277
Entergy Mississippi [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		574	549	718
Additions Charged to Income or Regulatory Assets		265	255	259
Other Changes Deductions from Provisions	[1]	(276)	(230)	(428)
Balance at End of Period		563	574	549
Entergy New Orleans [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		3,057	3,059	268
Additions Charged to Income or Regulatory Assets		187	152	2,872
Other Changes Deductions from Provisions	[1]	(22)	(154)	(81)
Balance at End of Period		3,222	3,057	3,059
Entergy Texas [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period		463	828	474
Additions Charged to Income or Regulatory Assets		279	192	531
Other Changes Deductions from Provisions	[1]	(281)	(557)	(177)
Balance at End of Period		$ 461	$ 463	$ 828

[1] (1) Deductions represent write-offs of accounts receivable balances and are reduced by recoveries of amounts previously written off.