Leases Leases (Lease, Assets) (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Lease, Right-of-Use Asset	$ 234,000
Finance Lease, Right-of-Use Asset	60,000
Entergy Arkansas [Member]
Operating Lease, Right-of-Use Asset	48,567
Finance Lease, Right-of-Use Asset	11,167
Entergy Louisiana [Member]
Operating Lease, Right-of-Use Asset	33,054
Finance Lease, Right-of-Use Asset	16,846
Entergy Mississippi [Member]
Operating Lease, Right-of-Use Asset	18,791
Finance Lease, Right-of-Use Asset	6,671
Entergy New Orleans [Member]
Operating Lease, Right-of-Use Asset	4,172
Finance Lease, Right-of-Use Asset	2,991
Entergy Texas [Member]
Operating Lease, Right-of-Use Asset	12,540
Finance Lease, Right-of-Use Asset	$ 5,439