Property, Plant, And Equipment (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Construction expenditures in accounts payable	$ 426.0	$ 459.0
Entergy Arkansas [Member]
Construction expenditures in accounts payable	64.4	93.2
Entergy Louisiana [Member]
Construction expenditures in accounts payable	117.3	154.3
Entergy Mississippi [Member]
Construction expenditures in accounts payable	57.6	59.5
Entergy New Orleans [Member]
Construction expenditures in accounts payable	5.7	11.2
Entergy Texas [Member]
Construction expenditures in accounts payable	104.8	68.9
System Energy [Member]
Construction expenditures in accounts payable	$ 36.6	$ 29.0