Leases Purchase Power Agreement Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 65,693
Lessee, Operating Lease, Liability, Payments, Due Year Two	57,497
Lessee, Operating Lease, Liability, Payments, Due Year Three	46,540
Lessee, Operating Lease, Liability, Payments, Due Year Four	38,525
Lessee, Operating Lease, Liability, Payments, Due	249,523
Entergy Louisiana [Member]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	13,076
Lessee, Operating Lease, Liability, Payments, Due Year Two	10,581
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,624
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,466
Lessee, Operating Lease, Liability, Payments, Due	46,157
Entergy Texas [Member]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	4,650
Lessee, Operating Lease, Liability, Payments, Due Year Two	3,705
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,299
Lessee, Operating Lease, Liability, Payments, Due Year Four	2,313
Lessee, Operating Lease, Liability, Payments, Due	$ 15,661