Leases Lease, Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Expense	$ 67,471	$ 63,566
Finance Lease, Right-of-Use Asset, Amortization	12,180	16,048
Finance Lease, Interest Expense	2,884	3,667
Short-term Lease, Cost	759	43
Entergy Louisiana [Member]
Operating Lease, Expense	13,944	11,975
Finance Lease, Right-of-Use Asset, Amortization	4,097	5,940
Finance Lease, Interest Expense	597	895
Short-term Lease, Cost	719	43
Entergy Mississippi [Member]
Operating Lease, Expense	6,584	6,927
Finance Lease, Right-of-Use Asset, Amortization	1,627	2,097
Finance Lease, Interest Expense	254	353
Entergy New Orleans [Member]
Operating Lease, Expense	1,443	1,406
Finance Lease, Right-of-Use Asset, Amortization	712	1,042
Finance Lease, Interest Expense	120	168
Entergy Texas [Member]
Operating Lease, Expense	4,870	4,259
Finance Lease, Right-of-Use Asset, Amortization	1,340	1,568
Finance Lease, Interest Expense	196	241
Entergy Arkansas [Member]
Operating Lease, Expense	14,344	13,213
Finance Lease, Right-of-Use Asset, Amortization	2,693	3,643
Finance Lease, Interest Expense	408	$ 594
Short-term Lease, Cost	$ 43