Rate And Regulatory Matters (Payments or Receipts Among Utility Operating Companies Production Cost Based) (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	Apr. 30, 2014
Entergy Arkansas [Member]
Payments (receipts) based on production costs	$ 67
Entergy Gulf States [Member]
Payments (receipts) based on production costs	(33)
Entergy Louisiana [Member]
Payments (receipts) based on production costs	0
Entergy Mississippi [Member]
Payments (receipts) based on production costs	(11)
Entergy New Orleans [Member]
Payments (receipts) based on production costs	2
Entergy Texas [Member]
Payments (receipts) based on production costs	$ (25)