Rate and Regulatory Matters (Details Textuals) (USD $)	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended		9 Months Ended
	Sep. 30, 2011	Jan. 31, 2011 Entergy Gulf States Louisiana [Member]	Mar. 31, 2011 Entergy Gulf States Louisiana [Member]	Sep. 30, 2011 Entergy Gulf States Louisiana [Member]	Sep. 30, 2011 Entergy Texas [Member]	Sep. 30, 2011 Entergy Mississippi [Member]	May 31, 2011 Entergy Louisiana, LLC [Member]	Sep. 30, 2011 Entergy Louisiana, LLC [Member]	Mar. 31, 2011 Entergy Louisiana, LLC [Member]	Sep. 30, 2011 Entergy New Orleans [Member]
Rate and Regulatory Matters (Textuals) [Abstract]
Disallowance costs recommended				$ 23,000,000
Total disallowance costs including interest				43,000,000
Amount related to a realignment to and recovery through base rates of certain fuel costs	2,000,000
Refund for fuel cost recovery				18,000,000	73,000,000
Amount to be Recovered from proposed settlement									200,000,000
Earned return on common equity		8.84%					11.07%
Revenue deficiency		300,000
Rate plan to reflect adjustments				5,100,000				43,100,000
Earned return on common equity adjusted			11.76%	11.11%		10.65%		11.07%
Reduction in rate			200,000	22,800,000				9,000
Effect of rate change on revenues								1,100,000
Decrease in Electric base revenue as per settlement	8,500,000
Decrease in Gas Base revenue as per settlement	1,600,000
Decrease in electric base revenue										6,500,000
Increase in gas base rate.										1,100,000
Deferral of Plant maintenance expenses incurred as per settlement										$ 13,400,000
Total annual production costs - limit	Each company's total annual production costs will have to be within +/-11% of Entergy System average total annual production costs
Production cost range in percentage, positive	11.00%
Production cost range in percentage, negative	(11.00%)
Prohibited from ordering refunds, start date	Sep. 13, 2001
Prohibited from ordering refunds, end date	May 02, 2003
Commencement date of bandwidth remedy	Jan. 01, 2006
Ordering refunds period	20 months
Prospective bandwidth remedy, start date	Jun. 01, 2005
Compliance filing period	60 days
Payments or receipts of operating companies	90 days
Compliance filing due period	Dec. 19, 2011
Proposed filing date	Jun. 01, 2011
Maximum period to file oppose refunds	30 days
Maximum period available to parties that favor refunds to file reply briefs	21 days