Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Short-Term Borrowings And The Outstanding Short-Term Borrowings) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Entergy Arkansas [Member]
Short-term Debt [Line Items]
Authorized	$ 250
Borrowings	140
Entergy Louisiana [Member]
Short-term Debt [Line Items]
Authorized	450
Borrowings	0
Entergy Mississippi [Member]
Short-term Debt [Line Items]
Authorized	175
Borrowings	0
Entergy New Orleans [Member]
Short-term Debt [Line Items]
Authorized	150
Borrowings	0
Entergy Texas [Member]
Short-term Debt [Line Items]
Authorized	200
Borrowings	80
System Energy [Member]
Short-term Debt [Line Items]
Authorized	200
Borrowings	$ 0