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, 2017	Dec. 31, 2016	Dec. 31, 2015
Entergy Arkansas [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3,741	$ 3,528	$ 3,242
Entergy Louisiana [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	5,079	4,746	4,324
Entergy Mississippi [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	2,133	1,997	1,920
Entergy New Orleans [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	731	708	721
Entergy Texas [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1,865	$ 1,778	$ 1,620