Summary Of Significant Accounting Policies (Schedule Of Net Property, Plant, And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	$ 7,383,000	$ 6,592,000
Distribution	8,972,000	8,343,000
Other	2,636,000	2,022,000
Construction work in progress	2,823,291	2,888,639
Nuclear fuel	677,000	861,000
Property, plant and equipment - net	35,182,693	31,974,446
Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,966,000	1,792,000
Distribution	2,457,000	2,329,000
Other	454,000	311,000
Construction work in progress	197,775	243,731
Nuclear fuel	196,000	221,000
Property, plant and equipment - net	7,666,979	7,210,556
Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	2,944,000	2,571,000
Distribution	3,078,000	2,882,000
Other	884,000	699,000
Construction work in progress	1,383,603	1,864,582
Nuclear fuel	268,000	298,000
Property, plant and equipment - net	15,388,901	14,068,741
Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,136,000	1,046,000
Distribution	1,489,000	1,342,000
Other	309,000	242,000
Construction work in progress	88,373	128,149
Nuclear fuel	0	0
Property, plant and equipment - net	3,866,962	3,267,048
Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	96,000	78,000
Distribution	505,000	471,000
Other	270,000	233,000
Construction work in progress	201,829	146,668
Nuclear fuel	0	0
Property, plant and equipment - net	1,265,070	1,125,352
Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,202,000	1,063,000
Distribution	1,443,000	1,319,000
Other	256,000	193,000
Construction work in progress	760,354	325,193
Nuclear fuel	0	0
Property, plant and equipment - net	4,188,529	3,414,608
System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	39,000	40,000
Distribution	0	0
Other	30,000	39,000
Construction work in progress	164,996	70,156
Nuclear fuel	150,000	235,000
Property, plant and equipment - net	2,099,942	2,129,081
Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	7,383,000	6,590,000
Distribution	8,972,000	8,343,000
Other	2,620,000	2,011,000
Construction work in progress	2,814,000	2,815,000
Nuclear fuel	614,000	754,000
Property, plant and equipment - net	34,911,000	31,546,000
Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	0	2,000
Distribution	0	0
Other	8,000	2,000
Construction work in progress	9,000	74,000
Nuclear fuel	63,000	107,000
Property, plant and equipment - net	264,000	419,000
Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	0	0
Distribution	0	0
Other	8,000	9,000
Construction work in progress	0	0
Nuclear fuel	0	0
Property, plant and equipment - net	8,000	9,000
Nuclear Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	7,439,000	7,096,000
Nuclear Plant [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,611,000	1,494,000
Nuclear Plant [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	4,042,000	3,725,000
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	1,716,000	1,745,000
Nuclear Plant [Member] | Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	7,369,000	6,964,000
Nuclear Plant [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	70,000	132,000
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	5,253,000	4,171,000
Other Plant In Service [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	785,000	820,000
Other Plant In Service [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	2,789,000	2,029,000
Other Plant In Service [Member] | Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	845,000	509,000
Other Plant In Service [Member] | Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	192,000	196,000
Other Plant In Service [Member] | Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	528,000	515,000
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	5,139,000	4,069,000
Other Plant In Service [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	114,000	102,000
Other Plant In Service [Member] | Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	$ 0	$ 0