Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Accumulated Benefit Obligations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	$ 130,600	$ 131,400
Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	6,600,000	5,200,000
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	4,086	3,765
Entergy Arkansas [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	1,379,108	1,107,023
Entergy Gulf States Louisiana [Member] | Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	2,693	2,510
Entergy Gulf States Louisiana [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	649,932	530,974
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	131	50
Entergy Louisiana [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	873,759	697,945
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	1,761	1,528
Entergy Mississippi [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	399,300	318,941
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	436	387
Entergy New Orleans [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	186,473	150,239
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	9,215	7,496
Entergy Texas [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	391,296	332,484
System Energy [Member] | Qualified Pension Plans [Member]
Accumulated Pension Benefit Obligation	$ 305,556	$ 247,807