Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Book Value And The Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Long-term Debt, Fair Value	$ 18,628,268	$ 15,880,239
Long-term Debt, Book Value	17,458,026	16,168,312
Entergy Arkansas [Member]
Long-term Debt, Fair Value	3,621,073	3,002,627
Long-term Debt, Book Value	3,538,384	3,225,759
Long term DOE obligations	190,000	187,000
Entergy Louisiana [Member]
Long-term Debt, Fair Value	8,038,675	6,834,134
Long-term Debt, Book Value	7,344,160	6,805,768
Entergy Mississippi [Member]
Long-term Debt, Fair Value	1,586,199	1,276,452
Long-term Debt, Book Value	1,469,454	1,325,750
Entergy New Orleans [Member]
Long-term Debt, Fair Value	522,688	491,569
Long-term Debt, Book Value	478,619	483,704
Entergy Texas [Member]
Long-term Debt, Fair Value	2,128,842	1,528,828
Long-term Debt, Book Value	1,938,303	1,513,735
System Energy [Member]
Long-term Debt, Fair Value	554,374	596,123
Long-term Debt, Book Value	570,001	630,750
Capital Lease Obligations	$ 34,000	$ 34,000