Leases Leases (Present Value Of future Minimum Lease Payments Sale Leaseback Transactions) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Long-term Debt, Fair Value	$ 18,126,143		$ 18,126,143		$ 15,880,239
Interest Expense, Debt	201,112	$ 192,314	402,105	$ 375,237
Entergy Arkansas [Member]
Long-term Debt, Fair Value	3,523,519		3,523,519		3,002,627
Interest Expense, Debt	35,827	30,917	69,210	60,683
Entergy Louisiana [Member]
Long-term Debt, Fair Value	7,892,133		7,892,133		6,834,134
Interest Expense, Debt	77,631	73,582	152,334	143,678
Entergy Mississippi [Member]
Long-term Debt, Fair Value	1,680,869		1,680,869		1,276,452
Interest Expense, Debt	15,342	14,061	29,882	27,966
Entergy New Orleans [Member]
Long-term Debt, Fair Value	511,691		511,691		491,569
Interest Expense, Debt	6,019	5,269	11,955	10,548
Entergy Texas [Member]
Long-term Debt, Fair Value	1,786,350		1,786,350		1,528,828
Interest Expense, Debt	20,153	21,835	42,613	43,886
System Energy [Member]
Long-term Debt, Fair Value	571,693		571,693		596,123
Interest Expense, Debt	$ 8,524	$ 9,656	$ 17,921	$ 18,981
Grand Gulf [Member] | System Energy [Member]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months					17,188
Long-term Debt, Maturities, Repayments of Principal in Year Two					17,188
Long-term Debt, Maturities, Repayments of Principal in Year Three					17,188
Long-term Debt, Maturities, Repayments of Principal in Year Four					17,188
Long-term Debt, Maturities, Repayments of Principal in Year Five					17,188
Long-term Debt, Maturities, Repayments of Principal after Year Five					223,437
Long-term Debt, Fair Value					309,377
Interest Expense, Debt					275,025
Long-term Debt					$ 34,352