Rate And Regulatory Matters (Details Of Other Regulatory Assets Included In Entergy Corporation And Subsidiaries) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	$ 4,968,553		$ 3,893,363
Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	1,391,276		1,014,392
Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	426,381		321,466
Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	914,229		715,503
Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	364,747		318,462
Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	175,596		137,191
Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	922,087		919,234
System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	335,613		261,740
Asset Retirement Obligation [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	513,800	[1]	447,600	[1]
Asset Retirement Obligation [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	254,800	[1]	225,900	[1]
Asset Retirement Obligation [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	10,800	[1]	11,000	[1]
Asset Retirement Obligation [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	156,700	[1]	139,200	[1]
Asset Retirement Obligation [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	6,300	[1]	5,900	[1]
Asset Retirement Obligation [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	3,800	[1]	3,700	[1]
Asset Retirement Obligation [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	80,400	[1]	60,800	[1]
New Nuclear Generation Development Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	58,400	[2]	115,200	[2]
New Nuclear Generation Development Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	0		56,200
Gas Hedging Costs [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	8,200		0
Pension And Post Retirement Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	2,798,800	[1]	1,723,100	[1]
Pension And Post Retirement Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	838,200	[1]	517,100	[1]
Pension And Post Retirement Costs [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	286,800	[1]	194,200	[1]
Pension And Post Retirement Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	487,200	[1]	318,400	[1]
Pension And Post Retirement Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	224,300	[1]	135,300	[1]
Pension And Post Retirement Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	115,800	[1]	76,800	[1]
Pension And Post Retirement Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	217,000	[1]	143,000	[1]
Pension And Post Retirement Costs [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	191,000	[1]	132,900	[1]
Provision For Storm Damages, Including Hurricane Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	736,200		786,800
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	125,600		115,200
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	13,700		3,400
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	5,000		4,600
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	591,700		663,600
Removal Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	245,100	[1]	188,900	[1]
Removal Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	59,000	[1]	18,600	[1]
Removal Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	76,300	[1]	64,300	[1]
Removal Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	35,200	[1]	34,900	[1]
Removal Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	18,900	[1]	15,100	[1]
Removal Costs [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	55,700	[1]	56,000	[1]
River Bend AFUDC [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	18,600		20,500
Nuclear Generation Development Costs [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	29,200	[2]	29,500	[2]
Nuclear Generation Development Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	29,200	[2]	29,500	[2]
Spindletop Gas Storage Facility [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	26,200	[3]	27,800	[3]
Transition To Competition Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	66,200		74,400
Rate Case Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	8,400	[2]	10,800	[2]
Little Gypsy Cost Proceeding [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	139,200		160,600
Little Gypsy Cost Proceeding [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	139,200		160,600
Regulatory Clause Revenues, under-recovered [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	79,600		77,700
Regulatory Clause Revenues, under-recovered [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	23,300		36,100
Regulatory Clause Revenues, under-recovered [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	11,100		3,000
Regulatory Clause Revenues, under-recovered [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	28,700		39,200
Incremental Ice Storm Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	9,000		9,500
Michoud Plant Maintenance [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	7,200		9,100
Human Capital Management Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	42,300		45,000
Human Capital Management Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	17,300	[2]	22,000	[2]
Human Capital Management Costs [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	11,200		10,000
Human Capital Management Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	13,800		13,000
Unamortized Loss on Reacquired Debt [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	76,200		83,000
Unamortized Loss on Reacquired Debt [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	26,200		28,800
Unamortized Loss on Reacquired Debt [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	6,800		8,300
Unamortized Loss on Reacquired Debt [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	14,300		15,200
Unamortized Loss on Reacquired Debt [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	8,200		8,900
Unamortized Loss on Reacquired Debt [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	1,800		2,000
Unamortized Loss on Reacquired Debt [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	10,500		7,700
Unamortized Loss on Reacquired Debt [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	8,500		12,000
Other [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	143,200		116,400
Other [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	12,800		10,300
Other [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	1,800		1,900
Other [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	38,700		15,400
Other [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	10,900		4,500
Other [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	6,800		6,100
Other [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	9,400		4,600
MISO Implementation Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	69,600		74,700
MISO Implementation Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	25,100	[2]	30,900	[2]
MISO Implementation Costs [Member] | Entergy Gulf States Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	15,700		15,300
MISO Implementation Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	21,400		20,800
MISO Implementation Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	4,000		4,200
Transition to Competition Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	66,200		74,400
Baxter Wilson Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	$ 6,000		$ 0

[1] Does not earn a return on investment, but is offset by related liabilities.

[2] Does not earn a return on investment.

[3] The jurisdictional split order assigned the regulatory asset to Entergy Texas. The regulatory asset, however, is being recovered and amortized at Entergy Gulf States Louisiana. As a result, a billing occurs monthly over the same term as the recovery and receipts will be submitted to Entergy Texas. Entergy Texas has recorded a receivable from Entergy Gulf States Louisiana and Entergy Gulf States Louisiana has recorded a corresponding payable.