Leases Leases (Lease, Liabilities) (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Lease, Liability, Current	$ 51,885
Finance Lease, Liability, Current	11,177
Operating Lease, Liability, Noncurrent	182,236
Finance Lease, Liability, Noncurrent	53,375
Entergy Arkansas [Member]
Operating Lease, Liability, Current	10,374
Finance Lease, Liability, Current	2,408
Operating Lease, Liability, Noncurrent	38,195
Finance Lease, Liability, Noncurrent	8,756
Entergy Louisiana [Member]
Operating Lease, Liability, Current	9,727
Finance Lease, Liability, Current	3,840
Operating Lease, Liability, Noncurrent	23,333
Finance Lease, Liability, Noncurrent	13,000
Entergy Mississippi [Member]
Operating Lease, Liability, Current	6,180
Finance Lease, Liability, Current	1,402
Operating Lease, Liability, Noncurrent	12,812
Finance Lease, Liability, Noncurrent	5,269
Entergy New Orleans [Member]
Operating Lease, Liability, Current	1,218
Finance Lease, Liability, Current	662
Operating Lease, Liability, Noncurrent	2,953
Finance Lease, Liability, Noncurrent	2,329
Entergy Texas [Member]
Operating Lease, Liability, Current	3,251
Finance Lease, Liability, Current	1,240
Operating Lease, Liability, Noncurrent	9,375
Finance Lease, Liability, Noncurrent	$ 4,112