Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Uncommitted Standby Letter of Credit Facilities to Support MISO Obligations) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	$ 0.4	$ 0.2
Non-MISO letter of credit outstanding	7.0
Entergy Texas [Member]
Letters of Credit Outstanding, Amount	5.3	$ 0.1
Credit Facility Of Twenty Five Million [Member] | Entergy Arkansas [Member]
Uncommitted Credit Facility	$ 25.0
Letter of Credit Fee, Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 4.5
Credit Facility of Fifteen Million [Member] | Entergy New Orleans [Member]
Uncommitted Credit Facility	$ 15.0
Letter of Credit Fee, Percentage	1.625%
Letters of Credit Outstanding, Amount	$ 1.0
Credit Facility Of One Hundred Twenty Five Million [Member] | Entergy Louisiana [Member]
Uncommitted Credit Facility	$ 125.0
Letter of Credit Fee, Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 70.0
Credit Facility of Sixty Five Million [Member] | Entergy Mississippi [Member]
Uncommitted Credit Facility	$ 65.0
Letter of Credit Fee, Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 4.3
Credit Facility of Eighty Million | Entergy Texas [Member]
Uncommitted Credit Facility	$ 80.0
Letter of Credit Fee, Percentage	0.875%
Letters of Credit Outstanding, Amount	$ 79.6