Leases Leases (Purchase Power Agreement Minimum Lease Payments) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 31,159
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 57,615	31,876
Lessee, Operating Lease, Liability, Payments, Due Year Three	49,126	32,609
Lessee, Operating Lease, Liability, Payments, Due Year Four	40,519	10,180
Lessee, Operating Lease, Liability, Payments, Due	264,571	105,824
Entergy Texas [Member]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		31,159
Lessee, Operating Lease, Liability, Payments, Due Year Two	3,776	31,876
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,026	32,609
Lessee, Operating Lease, Liability, Payments, Due Year Four	2,061	10,180
Lessee, Operating Lease, Liability, Payments, Due	14,353	$ 105,824
Entergy Louisiana [Member]
Lessee, Operating Lease, Liability, Payments, Due Year Two	9,797
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,046
Lessee, Operating Lease, Liability, Payments, Due Year Four	5,267
Lessee, Operating Lease, Liability, Payments, Due	$ 35,697