Leases Leases (Purchase Power Agreement Minimum Lease Payments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 31,159
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 59,965	31,876
Lessee, Operating Lease, Liability, Payments, Due Year Three	53,791	32,609
Lessee, Operating Lease, Liability, Payments, Due Year Four	45,391	10,180
Lessee, Operating Lease, Liability, Payments, Due	267,191	105,824
Entergy Texas [Member]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		31,159
Lessee, Operating Lease, Liability, Payments, Due Year Two	4,014	31,876
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,279	32,609
Lessee, Operating Lease, Liability, Payments, Due Year Four	2,338	10,180
Lessee, Operating Lease, Liability, Payments, Due	14,840	$ 105,824
Entergy Louisiana [Member]
Lessee, Operating Lease, Liability, Payments, Due Year Two	10,518
Lessee, Operating Lease, Liability, Payments, Due Year Three	8,787
Lessee, Operating Lease, Liability, Payments, Due Year Four	6,068
Lessee, Operating Lease, Liability, Payments, Due	$ 37,017