Rate And Regulatory Matters (Correction Of Regulatory Asset For Income Taxes, Income Statement And Statement Of Cash Flows) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statements Of Income [Abstract]
Income taxes	$ 73,113,000	$ (122,201,000)	$ 189,648,000	$ (122,363,000)
Net income	168,055,000	370,583,000	335,038,000	223,844,000
Earnings applicable to common equity	163,723,000	365,001,000	325,123,000	213,318,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			162,189,000	(122,657,000)
Changes in other regulatory assets			216,659,000	113,645,000
Other operating activities			34,897,000	23,733,000
Entergy Arkansas [Member]
Consolidated Statements Of Income [Abstract]
Income taxes	31,010,000	25,186,000	44,638,000	36,949,000
Net income	40,483,000	45,755,000	55,202,000	59,629,000
Earnings applicable to common equity	38,765,000	44,037,000	51,765,000	56,192,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			53,955,000	35,685,000
Changes in other regulatory assets			8,883,000	38,729,000
Other operating activities			(15,623,000)	(105,879,000)
Entergy Gulf States Louisiana [Member]
Consolidated Statements Of Income [Abstract]
Income taxes	17,887,000	(5,548,000)	33,162,000	12,036,000
Net income	29,720,000	50,389,000	56,885,000	78,748,000
Earnings applicable to common equity	29,514,000	50,183,000	56,473,000	78,336,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			44,828,000	16,197,000
Changes in other regulatory assets			39,396,000	3,691,000
Other operating activities			40,549,000	1,432,000
Entergy Louisiana [Member]
Consolidated Statements Of Income [Abstract]
Income taxes	20,876,000	(172,969,000)	32,918,000	(170,605,000)
Net income	61,377,000	130,714,000	106,753,000	164,009,000
Earnings applicable to common equity	59,639,000	128,976,000	103,278,000	160,534,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			69,345,000	(154,896,000)
Changes in other regulatory assets			82,219,000	16,784,000
Other operating activities			48,423,000	(2,109,000)
Entergy Mississippi [Member]
Consolidated Statements Of Income [Abstract]
Income taxes	13,375,000	12,739,000	21,740,000	18,586,000
Net income	18,954,000	15,914,000	32,888,000	24,596,000
Earnings applicable to common equity	18,247,000	15,207,000	31,474,000	23,182,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			17,319,000	5,627,000
Changes in other regulatory assets			(1,889,000)	4,773,000
Other operating activities			496,000	(3,342,000)
Entergy New Orleans
Consolidated Statements Of Income [Abstract]
Income taxes	(326,000)	(99,000)	(603,000)	108,000
Net income	598,000	7,186,000	1,905,000	7,226,000
Earnings applicable to common equity	357,000	6,945,000	1,423,000	6,744,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			(12,061,000)	(9,083,000)
Changes in other regulatory assets			12,461,000	9,286,000
Other operating activities			11,569,000	1,700,000
Entergy Texas [Member]
Consolidated Statements Of Income [Abstract]
Income taxes	7,346,000	11,577,000	10,323,000	13,565,000
Net income	10,953,000	16,204,000	11,875,000	17,948,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			(28,187,000)	12,373,000
Changes in other regulatory assets			46,800,000	34,619,000
Other operating activities			(1,258,000)	(6,690,000)
System Energy [Member]
Consolidated Statements Of Income [Abstract]
Income taxes	18,705,000	10,446,000	37,705,000	24,132,000
Net income	27,734,000	35,368,000	55,740,000	61,904,000
Consolidated Statements Of Cash Flows [Abstract]
Deferred income taxes, investment tax credits, and non-current taxes accrued			34,693,000	73,886,000
Changes in other regulatory assets			11,145,000	(2,334,000)
Other operating activities			$ (12,003,000)	$ (5,347,000)