Leases Purchase Power Agreement Minimum Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ 94,043
Operating Leases, Future Minimum Payments, Due in Two Years		82,191
Operating Leases, Future Minimum Payments, Due in Three Years		75,147
Operating Leases, Future Minimum Payments, Due in Four Years		60,808
Operating Leases, Future Minimum Payments, Due in Five Years		47,391
Operating Leases, Future Minimum Payments, Due Thereafter		88,004
Operating Leases, Future Minimum Payments Due		447,584
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 56,386
Lessee, Operating Lease, Liability, Payments, Due Year Three	47,919
Lessee, Operating Lease, Liability, Payments, Due Year Four	37,228
Lessee, Operating Lease, Liability, Payments, Due	263,171
Purchased Power Agreement [Domain]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		31,159
Lessee, Operating Lease, Liability, Payments, Due Year Two		31,876
Lessee, Operating Lease, Liability, Payments, Due Year Three		32,609
Lessee, Operating Lease, Liability, Payments, Due Year Four		10,180
Lessee, Operating Lease, Liability, Payments, Due		105,824
Entergy Louisiana [Member]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		25,970
Operating Leases, Future Minimum Payments, Due in Two Years		21,681
Operating Leases, Future Minimum Payments, Due in Three Years		19,514
Operating Leases, Future Minimum Payments, Due in Four Years		15,756
Operating Leases, Future Minimum Payments, Due in Five Years		12,092
Operating Leases, Future Minimum Payments, Due Thereafter		22,003
Operating Leases, Future Minimum Payments Due		117,016
Lessee, Operating Lease, Liability, Payments, Due Year Two	9,645
Lessee, Operating Lease, Liability, Payments, Due Year Three	6,935
Lessee, Operating Lease, Liability, Payments, Due Year Four	4,916
Lessee, Operating Lease, Liability, Payments, Due	38,933
Entergy Texas [Member]
Operating Leases, Future Minimum Payments Due, Next Twelve Months		5,744
Operating Leases, Future Minimum Payments, Due in Two Years		4,431
Operating Leases, Future Minimum Payments, Due in Three Years		3,625
Operating Leases, Future Minimum Payments, Due in Four Years		2,218
Operating Leases, Future Minimum Payments, Due in Five Years		1,561
Operating Leases, Future Minimum Payments, Due Thereafter		2,726
Operating Leases, Future Minimum Payments Due		20,305
Lessee, Operating Lease, Liability, Payments, Due Year Two	3,611
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,689
Lessee, Operating Lease, Liability, Payments, Due Year Four	2,336
Lessee, Operating Lease, Liability, Payments, Due	$ 15,778
Entergy Texas [Member] | Purchased Power Agreement [Domain]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		31,159
Lessee, Operating Lease, Liability, Payments, Due Year Two		31,876
Lessee, Operating Lease, Liability, Payments, Due Year Three		32,609
Lessee, Operating Lease, Liability, Payments, Due Year Four		10,180
Lessee, Operating Lease, Liability, Payments, Due		$ 105,824