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	Jun. 30, 2019	Dec. 31, 2018
Long-term Debt, Fair Value	$ 18,126,143	$ 15,880,239
Long-term Debt, Book Value	17,354,298	16,168,312
Entergy Arkansas [Member]
Long-term Debt, Fair Value	3,523,519	3,002,627
Long-term Debt, Book Value	3,527,146	3,225,759
Long term DOE obligations	189,000	187,000
Entergy Louisiana [Member]
Long-term Debt, Fair Value	7,892,133	6,834,134
Long-term Debt, Book Value	7,359,935	6,805,768
Entergy Mississippi [Member]
Long-term Debt, Fair Value	1,680,869	1,276,452
Long-term Debt, Book Value	1,619,420	1,325,750
Entergy New Orleans [Member]
Long-term Debt, Fair Value	511,691	491,569
Long-term Debt, Book Value	478,514	483,704
Entergy Texas [Member]
Long-term Debt, Fair Value	1,786,350	1,528,828
Long-term Debt, Book Value	1,664,936	1,513,735
System Energy [Member]
Long-term Debt, Fair Value	571,693	596,123
Long-term Debt, Book Value	590,646	630,750
Capital Lease Obligations	$ 34,000	$ 34,000