Property, Plant, And Equipment (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 447.0	$ 462.0
Entergy Arkansas [Member]
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	62.0	93.2
Entergy Louisiana [Member]
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	111.3	156.7
Entergy Mississippi [Member]
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	31.2	59.5
Entergy New Orleans [Member]
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	4.7	11.2
Entergy Texas [Member]
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	178.7	68.9
System Energy [Member]
Supplemental non cash investing activity [Abstract]
Capital Expenditures Incurred but Not yet Paid	$ 16.7	$ 29.0