Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Letters Of Credit	$ 9,000,000
Entergy Arkansas [Member] | Credit Facility Of Twenty Five Million [Member]
Uncommitted Credit Facility	25,000,000
Line of Credit Facility, Commitment Fee Amount	0.007
Letters Of Credit	2,000,000
Entergy Gulf States Louisiana [Member] | Credit Facility of Seventy Five Million [Domain]
Uncommitted Credit Facility	75,000,000
Line of Credit Facility, Commitment Fee Amount	0.007
Letters Of Credit	27,900,000
Entergy Louisiana [Member] | Credit Facility of Fifty Million [Domain]
Uncommitted Credit Facility	50,000,000
Line of Credit Facility, Commitment Fee Amount	0.007
Letters Of Credit	4,700,000
Entergy Mississippi [Member] | Credit Facility of Forty Million [Domain]
Uncommitted Credit Facility	40,000,000
Letters Of Credit	14,400,000
Entergy Mississippi [Member] | Credit Facility of Forty Million [Domain] | Minimum [Member]
Line of Credit Facility, Commitment Fee Amount	0.007
Entergy Mississippi [Member] | Credit Facility of Forty Million [Domain] | Maximum [Member]
Line of Credit Facility, Commitment Fee Amount	0.015
Entergy New Orleans [Member] | Credit Facility of Fifteen Million [Domain]
Uncommitted Credit Facility	15,000,000
Line of Credit Facility, Commitment Fee Amount	0.0075
Letters Of Credit	8,100,000
Entergy Texas [Member] | Credit Facility of Fifty Million [Domain]
Uncommitted Credit Facility	50,000,000
Line of Credit Facility, Commitment Fee Amount	0.007
Letters Of Credit	$ 24,500,000