Business Segment Information Business Segment Information (Restructuring Costs) (Details) - Entergy Wholesale Commodities [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 13.0	$ 71.0	$ 91.0
Paid in cash	135.0	55.0	141.0
Restructuring Reserve	37.0	159.0	143.0	$ 193.0
Employee Retention and Severances Expenses and Other Benefits-Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	12.0	71.0	91.0
Paid in cash	120.0	55.0	141.0
Restructuring Reserve	37.0	145.0	129.0	179.0
Economic Development Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1.0	0.0	0.0
Paid in cash	15.0	0.0	0.0
Restructuring Reserve	$ 0.0	$ 14.0	$ 14.0	$ 14.0