Rate And Regulatory Matters (Utility Operating Companies' Current Retail Base Rates) (Details)	1 Months Ended
	Apr. 30, 2012 Entergy Gulf States Louisiana [Member]	Jan. 31, 2012 Entergy Gulf States Louisiana [Member]	Aug. 31, 2010 Entergy Texas [Member]
Regulatory Assets [Line Items]
Authorized return on common equity	11.54%	10.48%	10.125%