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	Mar. 31, 2019	Dec. 31, 2018
Long-term Debt, Fair Value	$ 17,613,263	$ 15,880,239
Long-term Debt, Book Value	17,317,896	16,168,312
Entergy Arkansas [Member]
Long-term Debt, Fair Value	3,471,105	3,002,627
Long-term Debt, Book Value	3,555,152	3,225,759
Long term DOE obligations	188,000	187,000
Entergy Louisiana [Member]
Long-term Debt, Fair Value	7,665,243	6,834,134
Long-term Debt, Book Value	7,377,912	6,805,768
Entergy Mississippi [Member]
Long-term Debt, Fair Value	1,332,283	1,276,452
Long-term Debt, Book Value	1,325,915	1,325,750
Entergy New Orleans [Member]
Long-term Debt, Fair Value	510,959	491,569
Long-term Debt, Book Value	483,844	483,704
Entergy Texas [Member]
Long-term Debt, Fair Value	1,755,754	1,528,828
Long-term Debt, Book Value	1,680,966	1,513,735
System Energy [Member]
Long-term Debt, Fair Value	586,518	596,123
Long-term Debt, Book Value	610,798	630,750
Capital Lease Obligations	$ 34,000	$ 34,000