Leases Leases (Lease, Assets) (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Lease, Right-of-Use Asset	$ 236,000
Finance Lease, Right-of-Use Asset	60,000
Entergy Arkansas [Member]
Operating Lease, Right-of-Use Asset	49,503
Finance Lease, Right-of-Use Asset	11,094
Entergy Louisiana [Member]
Operating Lease, Right-of-Use Asset	34,248
Finance Lease, Right-of-Use Asset	16,795
Entergy Mississippi [Member]
Operating Lease, Right-of-Use Asset	18,149
Finance Lease, Right-of-Use Asset	6,994
Entergy New Orleans [Member]
Operating Lease, Right-of-Use Asset	3,894
Finance Lease, Right-of-Use Asset	2,913
Entergy Texas [Member]
Operating Lease, Right-of-Use Asset	13,074
Finance Lease, Right-of-Use Asset	$ 5,515