Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Contributions To Defined Contribution Plans) (Details) - Defined Contribution Plans [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Entergy Arkansas [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 4,111	$ 3,985	$ 3,741
Entergy Louisiana [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	5,641	5,450	5,079
Entergy Mississippi [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	2,424	2,307	2,133
Entergy New Orleans [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	882	795	731
Entergy Texas [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 2,136	$ 1,992	$ 1,865