Summary Of Significant Accounting Policies (Schedule Of Net Property, Plant, And Equipment) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	$ 3,929,000,000	$ 3,654,000,000
Distribution	6,716,000,000	6,561,000,000
Other	1,652,000,000	1,654,000,000
Construction work in progress	1,514,857,000	1,365,699,000
Nuclear fuel	1,567,000,000	1,598,000,000
Property, plant and equipment - net	27,881,644,000	27,298,545,000
Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	1,086,000,000	1,034,000,000
Distribution	1,831,000,000	1,747,000,000
Other	192,000,000	115,000,000
Construction work in progress	209,036,000	205,982,000
Nuclear fuel	322,000,000	304,000,000
Property, plant and equipment - net	5,295,579,000	5,099,738,000
Entergy Gulf States Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	646,000,000	573,000,000
Distribution	950,000,000	939,000,000
Other	184,000,000	187,000,000
Construction work in progress	105,314,000	125,448,000
Nuclear fuel	197,000,000	147,000,000
Property, plant and equipment - net	3,774,651,000	3,684,507,000
Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	770,000,000	734,000,000
Distribution	1,420,000,000	1,454,000,000
Other	292,000,000	289,000,000
Construction work in progress	672,883,000	404,714,000
Nuclear fuel	147,000,000	204,000,000
Property, plant and equipment - net	6,188,322,000	5,946,346,000
Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	638,000,000	581,000,000
Distribution	1,096,000,000	1,065,000,000
Other	197,000,000	201,000,000
Construction work in progress	37,316,000	62,876,000
Property, plant and equipment - net	2,504,898,000	2,455,104,000
Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	31,000,000	27,000,000
Distribution	340,000,000	331,000,000
Other	181,000,000	182,000,000
Construction work in progress	29,312,000	11,135,000
Property, plant and equipment - net	574,456,000	539,675,000
Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	673,000,000	642,000,000
Distribution	1,079,000,000	1,025,000,000
Other	106,000,000	106,000,000
Construction work in progress	94,743,000	90,469,000
Property, plant and equipment - net	2,323,501,000	2,233,896,000
System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	49,000,000	28,000,000
Other	17,000,000	17,000,000
Construction work in progress	29,061,000	40,392,000
Nuclear fuel	189,000,000	253,000,000
Property, plant and equipment - net	2,214,141,000	2,281,239,000
Utility Plants [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	3,894,000,000	3,619,000,000
Distribution	6,716,000,000	6,561,000,000
Other	1,475,000,000	1,416,000,000
Construction work in progress	1,217,000,000	973,000,000
Nuclear fuel	855,000,000	907,000,000
Property, plant and equipment - net	23,223,000,000	22,593,000,000
Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Transmission	35,000,000	35,000,000
Other	174,000,000	235,000,000
Construction work in progress	298,000,000	392,000,000
Nuclear fuel	712,000,000	691,000,000
Property, plant and equipment - net	4,656,000,000	4,702,000,000
Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Other	3,000,000	3,000,000
Construction work in progress	0	1,000,000
Property, plant and equipment - net	3,000,000	4,000,000
Nuclear Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	9,667,000,000	9,588,000,000
Nuclear Plant [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,047,000,000	1,073,000,000
Nuclear Plant [Member] | Entergy Gulf States Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,422,000,000	1,428,000,000
Nuclear Plant [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	2,202,000,000	2,180,000,000
Nuclear Plant [Member] | System Energy [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	1,930,000,000	1,943,000,000
Nuclear Plant [Member] | Utility Plants [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	6,601,000,000	6,624,000,000
Nuclear Plant [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	3,066,000,000	2,964,000,000
Nuclear Plant [Member] | Parent & Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	0
Other Plant In Service [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	2,836,000,000	2,878,000,000
Other Plant In Service [Member] | Entergy Arkansas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	609,000,000	621,000,000
Other Plant In Service [Member] | Entergy Gulf States Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	271,000,000	286,000,000
Other Plant In Service [Member] | Entergy Louisiana [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	684,000,000	680,000,000
Other Plant In Service [Member] | Entergy Mississippi [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	537,000,000	545,000,000
Other Plant In Service [Member] | Entergy New Orleans [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	(7,000,000)	(11,000,000)
Other Plant In Service [Member] | Entergy Texas [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	371,000,000	371,000,000
Other Plant In Service [Member] | Utility Plants [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	2,465,000,000	2,493,000,000
Other Plant In Service [Member] | Entergy Wholesale Commodities [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Production	$ 371,000,000	$ 385,000,000