Property, Plant, And Equipment (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Construction expenditures in accounts payable	$ 136,300,000	$ 166,000,000
Economic transition payments	4,272,151,000	3,933,416,000
Increase in decommissioning liability	101,600,000
Entergy Arkansas [Member]
Construction expenditures in accounts payable	24,000,000	61,900,000
Economic transition payments	806,232,000	723,771,000
Increase in decommissioning liability	43,600,000
Entergy Gulf States Louisiana [Member]
Construction expenditures in accounts payable	18,700,000	13,100,000
Economic transition payments	420,633,000	403,084,000
Entergy Louisiana [Member]
Construction expenditures in accounts payable	11,700,000	31,100,000
Economic transition payments	497,455,000	479,086,000
Entergy Mississippi [Member]
Construction expenditures in accounts payable	3,700,000	2,800,000
Economic transition payments	6,687,000	6,401,000
Entergy New Orleans [Member]
Construction expenditures in accounts payable	100,000	1,700,000
Economic transition payments	2,469,000	2,347,000
Entergy Texas [Member]
Construction expenditures in accounts payable	6,900,000	10,900,000
Economic transition payments	4,543,000	4,349,000
System Energy [Member]
Construction expenditures in accounts payable	9,700,000	6,700,000
Economic transition payments	647,263,000	616,157,000
Vermont Yankee [Member]
Clean energy development support		5,000,000
Economic transitional payments		10,000,000
Restoration liability		25,000,000
Response period for post-shutdown decommissioning activities report	60 days
Increase in decommissioning liability	101,600,000
VERMONT | Vermont Yankee [Member]
Economic transitional payments		$ 5,000,000