Property, Plant, And Equipment (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Construction expenditures in accounts payable	$ 401.0	$ 723.0
Entergy Arkansas [Member]
Construction expenditures in accounts payable	54.8	35.6
Entergy Louisiana [Member]
Construction expenditures in accounts payable	198.7	507.9
Entergy Mississippi [Member]
Construction expenditures in accounts payable	20.9	26.5
Entergy New Orleans [Member]
Construction expenditures in accounts payable	12.7
Entergy Texas [Member]
Construction expenditures in accounts payable	44.6	73.1
System Energy [Member]
Construction expenditures in accounts payable	$ 29.2	$ 23.4