Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Schedule of Short-Term Debt) (Details) $ in Millions	Mar. 31, 2024 USD ($)
Entergy Arkansas [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	$ 250
Short term borrowings, outstanding	0
Entergy Louisiana [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	450
Short term borrowings, outstanding	0
Entergy Mississippi [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	200
Short term borrowings, outstanding	56
Entergy New Orleans [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	150
Short term borrowings, outstanding	50
Entergy Texas [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	200
Short term borrowings, outstanding	0
System Energy [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	200
Short term borrowings, outstanding	$ 0