Property, Plant, And Equipment (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Construction expenditures in accounts payable	$ 354.0	$ 723.0
Entergy Arkansas [Member]
Construction expenditures in accounts payable	62.2	35.6
Entergy Louisiana [Member]
Construction expenditures in accounts payable	155.6	507.9
Entergy Mississippi [Member]
Construction expenditures in accounts payable	22.6	26.5
Entergy New Orleans [Member]
Construction expenditures in accounts payable	6.7
Entergy Texas [Member]
Construction expenditures in accounts payable	37.8	73.1
System Energy [Member]
Construction expenditures in accounts payable	$ 29.9	$ 23.4