Variable Interest Entities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Entergy Louisiana [Member]
Variable Interest Entities (Textual) [Abstract]
Payments on lease, including interest	$ 28.8	$ 31.0	$ 26.3
System Energy [Member]
Variable Interest Entities (Textual) [Abstract]
Payments on lease, including interest	$ 52.3	$ 51.6	$ 50.5