Leases Lease, Assets (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating Lease, Right-of-Use Asset	$ 234,000
Finance Lease, Right-of-Use Asset	61,000
Entergy Louisiana [Member]
Operating Lease, Right-of-Use Asset	36,034
Finance Lease, Right-of-Use Asset	17,209
Entergy Mississippi [Member]
Operating Lease, Right-of-Use Asset	16,900
Finance Lease, Right-of-Use Asset	6,869
Entergy New Orleans [Member]
Operating Lease, Right-of-Use Asset	3,878
Finance Lease, Right-of-Use Asset	3,291
Entergy Texas [Member]
Operating Lease, Right-of-Use Asset	14,020
Finance Lease, Right-of-Use Asset	5,273
Entergy Arkansas [Member]
Operating Lease, Right-of-Use Asset	52,317
Finance Lease, Right-of-Use Asset	$ 11,216