Leases Lease, Liabilities (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating Lease, Liability, Current	$ 52,678
Finance Lease, Liability, Current	11,413
Operating Lease, Liability, Noncurrent	181,339
Finance Lease, Liability, Noncurrent	53,396
Entergy Louisiana [Member]
Operating Lease, Liability, Current	10,331
Finance Lease, Liability, Current	3,919
Operating Lease, Liability, Noncurrent	25,743
Finance Lease, Liability, Noncurrent	13,376
Entergy Mississippi [Member]
Operating Lease, Liability, Current	5,633
Finance Lease, Liability, Current	1,487
Operating Lease, Liability, Noncurrent	11,232
Finance Lease, Liability, Noncurrent	5,382
Entergy New Orleans [Member]
Operating Lease, Liability, Current	1,134
Finance Lease, Liability, Current	647
Operating Lease, Liability, Noncurrent	2,746
Finance Lease, Liability, Noncurrent	2,644
Entergy Texas [Member]
Operating Lease, Liability, Current	3,698
Finance Lease, Liability, Current	1,222
Operating Lease, Liability, Noncurrent	10,364
Finance Lease, Liability, Noncurrent	4,009
Entergy Arkansas [Member]
Operating Lease, Liability, Current	11,443
Finance Lease, Liability, Current	2,442
Operating Lease, Liability, Noncurrent	40,880
Finance Lease, Liability, Noncurrent	$ 8,768