Property, Plant, And Equipment (Narrative) (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Construction expenditures in accounts payable	$ 147,000,000	$ 209,000,000
Economic transition payments	4,513,168,000	4,458,296,000
Entergy Arkansas [Member]
Construction expenditures in accounts payable	31,500,000	37,300,000
Economic transition payments	830,655,000	818,351,000
Entergy Gulf States Louisiana [Member]
Construction expenditures in accounts payable	26,900,000	23,400,000
Economic transition payments	452,733,000	446,619,000
Entergy Louisiana [Member]
Construction expenditures in accounts payable	17,000,000	48,000,000
Economic transition payments	510,093,000	503,734,000
Entergy Mississippi [Member]
Construction expenditures in accounts payable	8,300,000	7,800,000
Economic transition payments	6,885,000	6,786,000
Entergy New Orleans [Member]
Construction expenditures in accounts payable	100,000	900,000
Economic transition payments	2,554,000	2,511,000
Entergy Texas [Member]
Construction expenditures in accounts payable	9,100,000	24,100,000
Economic transition payments	4,677,000	4,610,000
System Energy [Member]
Construction expenditures in accounts payable	10,300,000	7,700,000
Economic transition payments	$ 769,620,000	$ 757,918,000