Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Schedule of uncommitted standby letter of credit facilities) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Financial transmission rights
Letters of Credit Outstanding, Amount	$ 4.0	$ 2.0
Entergy Arkansas [Member] | Financial transmission rights
Letters of Credit Outstanding, Amount	2.1	0.5
Entergy Mississippi [Member] | Financial transmission rights
Letters of Credit Outstanding, Amount	1.2	0.8
Entergy Louisiana [Member] | Financial transmission rights
Letters of Credit Outstanding, Amount	0.5	0.1
Entergy New Orleans [Member] | Financial transmission rights
Letters of Credit Outstanding, Amount		0.1
Entergy Texas [Member] | Financial transmission rights
Letters of Credit Outstanding, Amount		$ 0.3
Credit Facility of $25 Million [Member] | Entergy Arkansas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	25.0
Letters of Credit Outstanding, Amount	0.0
Credit Facility of $25 Million [Member] | Entergy New Orleans [Member]
Line of Credit Facility, Maximum Borrowing Capacity	25.0
Letters of Credit Outstanding, Amount	0.0
Uncommitted Credit Facility of $25 Million [Member] | Entergy Arkansas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 25.0
Line of Credit Facility, Commitment Fee Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 19.8
Uncommitted Credit Facility of $25 Million [Member] | Entergy Arkansas [Member] | Financial Transmission Rights (FTRs) [Member]
Letters of Credit Outstanding, Amount	2.1
Uncommitted Credit Facility of $125 Million [Member] | Entergy Louisiana [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 125.0
Line of Credit Facility, Commitment Fee Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 117.0
Uncommitted Credit Facility of $125 Million [Member] | Entergy Louisiana [Member] | Financial Transmission Rights (FTRs) [Member]
Letters of Credit Outstanding, Amount	0.5
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | Facility 1
Line of Credit Facility, Maximum Borrowing Capacity	$ 65.0
Line of Credit Facility, Commitment Fee Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 62.2
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | Facility 2
Line of Credit Facility, Maximum Borrowing Capacity	$ 65.0
Line of Credit Facility, Commitment Fee Percentage	0.50%
Letters of Credit Outstanding, Amount	$ 43.0
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | Financial Transmission Rights (FTRs) [Member]
Letters of Credit Outstanding, Amount	1.2
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | MISO [Member]
Letters of Credit Outstanding, Amount	60.9
Uncommitted Credit Facility of $65 Million [Member] | Entergy Mississippi [Member] | Non-MISO [Member]
Letters of Credit Outstanding, Amount	1.3
Uncommitted Credit Facility of $75 Million | Entergy Arkansas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 75.0
Line of Credit Facility, Commitment Fee Percentage	0.50%
Letters of Credit Outstanding, Amount	$ 15.6
Uncommitted Credit Facility of $45 Million | Entergy Louisiana [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 45.0
Line of Credit Facility, Commitment Fee Percentage	0.50%
Letters of Credit Outstanding, Amount	$ 45.0
Uncommitted Credit Facility of $1 Million | Entergy New Orleans [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1.0
Line of Credit Facility, Commitment Fee Percentage	1.625%
Letters of Credit Outstanding, Amount	$ 0.5
Uncommitted Credit Facility of $150 Million | Entergy Texas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 150.0
Line of Credit Facility, Commitment Fee Percentage	1.25%
Letters of Credit Outstanding, Amount	$ 51.5
Uncommitted Credit Facility of $160 Million | Entergy Texas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 160.0
Line of Credit Facility, Commitment Fee Percentage	1.05%
Letters of Credit Outstanding, Amount	$ 0.0
Minimum [Member] | Entergy Arkansas [Member]
Line of Credit Facility, Commitment Fee Percentage	0.075%
Minimum [Member] | Entergy Mississippi [Member]
Line of Credit Facility, Commitment Fee Percentage	0.075%
Minimum [Member] | Entergy Louisiana [Member]
Line of Credit Facility, Commitment Fee Percentage	0.075%
Minimum [Member] | Entergy New Orleans [Member]
Line of Credit Facility, Commitment Fee Percentage	0.075%
Minimum [Member] | Entergy Texas [Member]
Line of Credit Facility, Commitment Fee Percentage	0.075%
Maximum [Member] | Entergy Arkansas [Member]
Line of Credit Facility, Commitment Fee Percentage	0.375%
Maximum [Member] | Entergy Mississippi [Member]
Line of Credit Facility, Commitment Fee Percentage	0.375%
Maximum [Member] | Entergy Louisiana [Member]
Line of Credit Facility, Commitment Fee Percentage	0.375%
Maximum [Member] | Entergy New Orleans [Member]
Line of Credit Facility, Commitment Fee Percentage	0.375%
Maximum [Member] | Entergy Texas [Member]
Line of Credit Facility, Commitment Fee Percentage	0.375%