Variable Interest Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entities (Textual) [Abstract]
Assets	$ 59,454,242	$ 58,239,212
System Energy [Member]
Variable Interest Entities (Textual) [Abstract]
Assets	4,372,624	4,413,968
System Energy [Member] | Grand Gulf [Member]
Variable Interest Entities (Textual) [Abstract]
Payments on lease, including interest	17,200	17,200	$ 17,200
Entergy Arkansas [Member]
Variable Interest Entities (Textual) [Abstract]
Assets	12,565,119	$ 12,100,131
Entergy Arkansas [Member] | AR Searcy Partnership, LLC
Variable Interest Entities (Textual) [Abstract]
Assets	140,000
Ownership Interest in Partnership, Carrying Value	$ 107,000