Leases Leases (Lease, Liabilities) (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Lease, Liability, Current	$ 52,348
Finance Lease, Liability, Current	11,482
Operating Lease, Liability, Noncurrent	184,404
Finance Lease, Liability, Noncurrent	53,252
Entergy Arkansas [Member]
Operating Lease, Liability, Current	10,662
Finance Lease, Liability, Current	2,600
Operating Lease, Liability, Noncurrent	38,881
Finance Lease, Liability, Noncurrent	8,665
Entergy Louisiana [Member]
Operating Lease, Liability, Current	9,969
Finance Lease, Liability, Current	3,860
Operating Lease, Liability, Noncurrent	24,289
Finance Lease, Liability, Noncurrent	12,925
Entergy Mississippi [Member]
Operating Lease, Liability, Current	6,137
Finance Lease, Liability, Current	1,473
Operating Lease, Liability, Noncurrent	12,254
Finance Lease, Liability, Noncurrent	5,521
Entergy New Orleans [Member]
Operating Lease, Liability, Current	1,138
Finance Lease, Liability, Current	626
Operating Lease, Liability, Noncurrent	2,755
Finance Lease, Liability, Noncurrent	2,286
Entergy Texas [Member]
Operating Lease, Liability, Current	3,427
Finance Lease, Liability, Current	1,252
Operating Lease, Liability, Noncurrent	9,689
Finance Lease, Liability, Noncurrent	$ 4,221