Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Accumulated Benefit Obligations) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Qualified Pension Plans [Member]
Accumulated pension benefit obligation	$ 6,900,000	$ 7,400,000
Non-Qualified Pension Plans [Member]
Accumulated pension benefit obligation	131,900	144,700
Entergy Arkansas [Member] | Qualified Pension Plans [Member]
Accumulated pension benefit obligation	1,362,425	1,492,876
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Accumulated pension benefit obligation	2,519	3,825
Entergy Louisiana [Member] | Qualified Pension Plans [Member]
Accumulated pension benefit obligation	1,481,158	1,652,939
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Accumulated pension benefit obligation	1,881	2,061
Entergy Mississippi [Member] | Qualified Pension Plans [Member]
Accumulated pension benefit obligation	387,635	430,268
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Accumulated pension benefit obligation	2,427	2,250
Entergy New Orleans [Member] | Qualified Pension Plans [Member]
Accumulated pension benefit obligation	179,907	205,316
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Accumulated pension benefit obligation	206	519
Entergy Texas [Member] | Qualified Pension Plans [Member]
Accumulated pension benefit obligation	347,852	387,083
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Accumulated pension benefit obligation	7,724	8,602
System Energy [Member] | Qualified Pension Plans [Member]
Accumulated pension benefit obligation	$ 317,848	$ 359,258