Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Amounts Recorded On The Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Current liabilities	$ (57,994)	$ (67,419)
Non-current liabilities	(3,638,295)	(2,320,704)
Entergy Arkansas [Member]
Non-current liabilities	(571,870)	(319,211)
Total funded status		(4,162)
Regulatory Asset		1,979
Entergy Gulf States Louisiana [Member]
Non-current liabilities	(401,144)	(274,315)
Total funded status		(2,511)
Regulatory Asset		422
Entergy Louisiana [Member]
Non-current liabilities	(530,844)	(358,017)
Total funded status		(50)
Regulatory Asset		(87)
Entergy Mississippi [Member]
Non-current liabilities	(135,156)	(66,722)
Total funded status		(1,752)
Regulatory Asset		637
Entergy New Orleans [Member]
Non-current liabilities	(62,440)	(32,497)
Total funded status		(434)
Regulatory Asset		(18)
Entergy Texas [Member]
Non-current liabilities	(111,011)	(51,253)
Total funded status		(7,910)
Regulatory Asset		(1,631)
System Energy [Member]
Non-current liabilities	(129,152)	(79,411)
Qualified Pension Obligations [Member]
Employee contributions	560	598
Non-current liabilities	(2,402,576)	(1,341,762)
Accumulated other comprehensive income (before taxes)	672,697	385,212
Qualified Pension Obligations [Member] | Entergy Arkansas [Member]
Non-current liabilities	(508,197)	(296,345)
Qualified Pension Obligations [Member] | Entergy Gulf States Louisiana [Member]
Non-current liabilities	(208,168)	(110,567)
Qualified Pension Obligations [Member] | Entergy Louisiana [Member]
Non-current liabilities	(345,008)	(199,458)
Qualified Pension Obligations [Member] | Entergy Mississippi [Member]
Non-current liabilities	(130,919)	(63,987)
Qualified Pension Obligations [Member] | Entergy New Orleans [Member]
Non-current liabilities	(69,211)	(40,747)
Qualified Pension Obligations [Member] | Entergy Texas [Member]
Non-current liabilities	(107,785)	(60,329)
Qualified Pension Obligations [Member] | System Energy [Member]
Non-current liabilities	(116,691)	(74,461)
Non-Qualified Pension Plans [Member]
Current liabilities	(16,200)	(26,800)
Non-current liabilities	(135,600)	(127,500)
Accumulated other comprehensive income (before taxes)	23,500	26,100
Non-Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Current liabilities	(347)	(367)
Non-current liabilities	(4,148)	(3,795)
Total funded status	(4,495)
Regulatory Asset	2,368
Accumulated other comprehensive income (before taxes)	0	0
Non-Qualified Pension Plans [Member] | Entergy Gulf States Louisiana [Member]
Current liabilities	(241)	(262)
Non-current liabilities	(2,452)	(2,249)
Total funded status	(2,693)
Regulatory Asset	659
Accumulated other comprehensive income (before taxes)	98	57
Non-Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Current liabilities	(18)	(6)
Non-current liabilities	(140)	(44)
Total funded status	(158)
Regulatory Asset	37
Accumulated other comprehensive income (before taxes)	0	0
Non-Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Current liabilities	(119)	(118)
Non-current liabilities	(2,009)	(1,634)
Total funded status	(2,128)
Regulatory Asset	942
Accumulated other comprehensive income (before taxes)	0	0
Non-Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Current liabilities	(23)	(20)
Non-current liabilities	(453)	(414)
Total funded status	(476)
Regulatory Asset	(65)
Accumulated other comprehensive income (before taxes)	0	0
Non-Qualified Pension Plans [Member] | Entergy Texas [Member]
Current liabilities	(753)	(786)
Non-current liabilities	(8,814)	(7,124)
Total funded status	(9,567)
Regulatory Asset	296
Accumulated other comprehensive income (before taxes)	$ 0	$ 0