Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Schedule of Short-Term Debt) (Details) $ in Millions	Jun. 30, 2026 USD ($)
Entergy Arkansas [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	$ 250.0
Short term borrowings, outstanding	0.0
Entergy Arkansas [Member] \| Credit Facility of $300 Million [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	5.0
Letters of Credit Outstanding, Amount	0.0
Entergy Louisiana [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	450.0
Short term borrowings, outstanding	0.0
Entergy Mississippi [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	200.0
Short term borrowings, outstanding	0.0
Entergy Mississippi [Member] \| Credit Facility of $300 Million [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	5.0
Letters of Credit Outstanding, Amount	0.0
Entergy New Orleans [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	150.0
Short term borrowings, outstanding	0.0
Entergy Texas [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	200.0
Short term borrowings, outstanding	0.0
Entergy Texas [Member] \| Credit Facility of $300 Million [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	25.0
Letters of Credit Outstanding, Amount	1.1
System Energy [Member]
Short Term Borrowings And The Outstanding Short Term Borrowings Abstract
Authorized Short Term Borrowings	200.0
Short term borrowings, outstanding	$ 46.0