Property, Plant, And Equipment (Narrative) (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Construction expenditures in accounts payable	$ 149,500,000	$ 166,000,000
Economic transition payments	4,040,099,000	3,933,416,000
Entergy Arkansas [Member]
Construction expenditures in accounts payable	40,100,000	61,900,000
Economic transition payments	778,512,000	723,771,000
Entergy Gulf States Louisiana [Member]
Construction expenditures in accounts payable	19,900,000	13,100,000
Economic transition payments	408,851,000	403,084,000
Entergy Louisiana [Member]
Construction expenditures in accounts payable	14,500,000	31,100,000
Economic transition payments	485,132,000	479,086,000
Entergy Mississippi [Member]
Construction expenditures in accounts payable	6,100,000	2,800,000
Economic transition payments	6,495,000	6,401,000
Entergy New Orleans [Member]
Construction expenditures in accounts payable		1,700,000
Economic transition payments	2,387,000	2,347,000
Entergy Texas [Member]
Construction expenditures in accounts payable	9,800,000	10,900,000
Economic transition payments	4,412,000	4,349,000
System Energy [Member]
Construction expenditures in accounts payable	15,600,000	6,700,000
Economic transition payments	626,349,000	616,157,000
Vermont Yankee [Member]
Clean energy development support		5,000,000
Economic transitional payments		10,000,000
Restoration liability		25,000,000
VERMONT | Vermont Yankee [Member]
Economic transitional payments		$ 5,000,000