Leases Leases (Lease, Cost) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Short-term Lease, Cost	$ 15	$ 15
Operating Lease, Expense	16,086	47,061
Finance Lease, Right-of-Use Asset, Amortization	2,945	10,837
Finance Lease, Interest Expense	763	2,597
Entergy Arkansas [Member]
Operating Lease, Expense	3,306	9,724
Finance Lease, Right-of-Use Asset, Amortization	621	2,448
Finance Lease, Interest Expense	105	408
Entergy Louisiana [Member]
Short-term Lease, Cost	15	15
Operating Lease, Expense	3,003	8,854
Finance Lease, Right-of-Use Asset, Amortization	1,014	4,014
Finance Lease, Interest Expense	161	612
Entergy Mississippi [Member]
Operating Lease, Expense	1,752	5,220
Finance Lease, Right-of-Use Asset, Amortization	369	1,408
Finance Lease, Interest Expense	65	241
Entergy New Orleans [Member]
Operating Lease, Expense	349	1,058
Finance Lease, Right-of-Use Asset, Amortization	178	696
Finance Lease, Interest Expense	29	114
Entergy Texas [Member]
Operating Lease, Expense	1,074	3,135
Finance Lease, Right-of-Use Asset, Amortization	335	965
Finance Lease, Interest Expense	$ 54	$ 153