Summary Of Significant Accounting Policies (Schedule Of Net Property, Plant, And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	$ 8,758,000	$ 7,383,000
Distribution	10,805,000	8,972,000
Other	2,804,000	2,636,000
Construction work in progress	2,012,030	2,823,291
Nuclear fuel	601,000	677,000
Property, plant and equipment - net	38,852,777	35,182,693
Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	2,053,000	1,966,000
Distribution	2,666,000	2,457,000
Other	506,000	454,000
Construction work in progress	234,213	197,775
Nuclear fuel	163,000	196,000
Property, plant and equipment - net	8,047,224	7,666,979
Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	3,756,000	2,944,000
Distribution	4,130,000	3,078,000
Other	984,000	884,000
Construction work in progress	667,281	1,383,603
Nuclear fuel	210,000	268,000
Property, plant and equipment - net	17,387,718	15,388,901
Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,235,000	1,136,000
Distribution	1,651,000	1,489,000
Other	325,000	309,000
Construction work in progress	134,854	88,373
Nuclear fuel	0	0
Property, plant and equipment - net	4,214,497	3,866,962
Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	111,000	96,000
Distribution	576,000	505,000
Other	326,000	270,000
Construction work in progress	12,460	201,829
Nuclear fuel	0	0
Property, plant and equipment - net	1,441,326	1,265,070
Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,566,000	1,202,000
Distribution	1,782,000	1,443,000
Other	273,000	256,000
Construction work in progress	879,908	760,354
Nuclear fuel	0	0
Property, plant and equipment - net	5,023,101	4,188,529
System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	37,000	39,000
Distribution	0	0
Other	26,000	30,000
Construction work in progress	59,831	164,996
Nuclear fuel	175,000	150,000
Property, plant and equipment - net	2,188,927	2,099,942
Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	8,758,000	7,383,000
Distribution	10,805,000	8,972,000
Other	2,792,000	2,620,000
Construction work in progress	2,008,000	2,814,000
Nuclear fuel	548,000	614,000
Property, plant and equipment - net	38,674,000	34,911,000
Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	0	0
Distribution	0	0
Other	5,000	8,000
Construction work in progress	4,000	9,000
Nuclear fuel	53,000	63,000
Property, plant and equipment - net	171,000	264,000
Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	0	0
Distribution	0	0
Other	7,000	8,000
Construction work in progress	0	0
Nuclear fuel	0	0
Property, plant and equipment - net	7,000	8,000
Nuclear Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	7,526,000	7,439,000
Nuclear Plant [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,622,000	1,611,000
Nuclear Plant [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	3,980,000	4,042,000
Nuclear Plant [Member] | Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	0	0
Nuclear Plant [Member] | Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	0	0
Nuclear Plant [Member] | Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	0	0
Nuclear Plant [Member] | System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,891,000	1,716,000
Nuclear Plant [Member] | Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	7,493,000	7,369,000
Nuclear Plant [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	33,000	70,000
Nuclear Plant [Member] | Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	0	0
Other Plant In Service [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	6,346,000	5,253,000
Other Plant In Service [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	803,000	785,000
Other Plant In Service [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	3,660,000	2,789,000
Other Plant In Service [Member] | Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	868,000	845,000
Other Plant In Service [Member] | Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	416,000	192,000
Other Plant In Service [Member] | Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	523,000	528,000
Other Plant In Service [Member] | System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	0	0
Other Plant In Service [Member] | Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	6,270,000	5,139,000
Other Plant In Service [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	76,000	114,000
Other Plant In Service [Member] | Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	$ 0	$ 0