Summary Of Significant Accounting Policies (Schedule Of Net Property, Plant, And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	$ 6,592,000	$ 5,844,000
Distribution	8,343,000	8,000,000
Other	2,022,000	1,755,000
Construction work in progress	2,888,639	1,980,508
Nuclear fuel	861,000	923,000
Property, plant and equipment - net	31,974,446	29,664,360
Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,792,000	1,650,000
Distribution	2,329,000	2,226,000
Other	311,000	247,000
Construction work in progress	243,731	280,888
Nuclear fuel	221,000	277,000
Property, plant and equipment - net	7,210,556	6,855,419
Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	2,571,000	2,148,000
Distribution	2,882,000	2,748,000
Other	699,000	592,000
Construction work in progress	1,864,582	1,281,452
Nuclear fuel	298,000	337,000
Property, plant and equipment - net	14,068,741	12,786,242
Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,046,000	900,000
Distribution	1,342,000	1,316,000
Other	242,000	203,000
Construction work in progress	128,149	149,367
Nuclear fuel	0	0
Property, plant and equipment - net	3,267,048	3,128,483
Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	78,000	81,000
Distribution	471,000	440,000
Other	233,000	204,000
Construction work in progress	146,668	46,993
Nuclear fuel	0	0
Property, plant and equipment - net	1,125,352	979,313
Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,063,000	1,021,000
Distribution	1,319,000	1,270,000
Other	193,000	168,000
Construction work in progress	325,193	102,088
Nuclear fuel	0	0
Property, plant and equipment - net	3,414,608	3,091,996
System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	40,000	42,000
Distribution	0	0
Other	39,000	39,000
Construction work in progress	70,156	69,937
Nuclear fuel	235,000	208,000
Property, plant and equipment - net	2,129,081	2,018,562
Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	6,590,000	5,842,000
Distribution	8,343,000	8,000,000
Other	2,011,000	1,748,000
Construction work in progress	2,815,000	1,951,000
Nuclear fuel	754,000	822,000
Property, plant and equipment - net	31,546,000	29,175,000
Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	2,000	2,000
Distribution	0	0
Other	2,000	3,000
Construction work in progress	74,000	30,000
Nuclear fuel	107,000	101,000
Property, plant and equipment - net	419,000	485,000
Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	0	0
Distribution	0	0
Other	9,000	4,000
Construction work in progress	0	0
Nuclear fuel	0	0
Property, plant and equipment - net	9,000	4,000
Nuclear Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	7,096,000	6,946,000
Nuclear Plant [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,494,000	1,368,000
Nuclear Plant [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	3,725,000	3,664,000
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	1,745,000	1,660,000
Nuclear Plant [Member] | Utility [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	6,964,000	6,694,000
Nuclear Plant [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	132,000	252,000
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	4,171,000	4,215,000
Other Plant In Service [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	820,000	806,000
Other Plant In Service [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	2,029,000	2,016,000
Other Plant In Service [Member] | Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	509,000	560,000
Other Plant In Service [Member] | Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	196,000	207,000
Other Plant In Service [Member] | Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	515,000	531,000
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	4,069,000	4,118,000
Other Plant In Service [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	102,000	97,000
Other Plant In Service [Member] | Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	$ 0	$ 0