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Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations (Details)
12 Months Ended
Dec. 31, 2015
USD ($)
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 0.0070
Letters Of Credit 1,000,000
Entergy Louisiana [Member] | Credit Facility of One Hundred and Twenty Five Million [Member]  
Uncommitted Credit Facility 125,000,000
Line of Credit Facility, Commitment Fee Amount 0.0070
Letters Of Credit 17,100,000
Entergy Mississippi [Member] | Credit Facility of Forty Million [Domain]  
Uncommitted Credit Facility 40,000,000
Letters Of Credit 6,000,000
Entergy Mississippi [Member] | Credit Facility of Forty Million [Domain] | Minimum [Member]  
Line of Credit Facility, Commitment Fee Amount 0.0070
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 1,400,000
Entergy Texas [Member] | Credit Facility of Fifty Million [Domain]  
Uncommitted Credit Facility 50,000,000
Line of Credit Facility, Commitment Fee Amount 0.0070
Letters Of Credit $ 9,400,000