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	6 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	$ 6.0	$ 2.0
Entergy Arkansas [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	1.4	0.1
Entergy Mississippi [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	2.5	0.8
Entergy Louisiana [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	1.3	0.8
Entergy Texas [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	0.6	$ 0.1
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 $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	$ 111.1
Uncommitted Credit Facility of $125 Million [Member] \| Entergy Louisiana [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	1.3
Uncommitted Credit Facility of $65 Million [Member] \| Entergy Mississippi [Member] \| Facility 1 [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 65.0
Line of Credit Facility, Commitment Fee Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 64.3
Uncommitted Credit Facility of $65 Million [Member] \| Entergy Mississippi [Member] \| Facility 2 [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 65.0
Line of Credit Facility, Commitment Fee Percentage	0.50%
Letters of Credit Outstanding, Amount	$ 56.0
Uncommitted Credit Facility of $65 Million [Member] \| Entergy Mississippi [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	2.5
Uncommitted Credit Facility of $65 Million [Member] \| Entergy Mississippi [Member] \| MISO [Member]
Letters of Credit Outstanding, Amount	63.0
Uncommitted Credit Facility of $65 Million [Member] \| Entergy Mississippi [Member] \| Non-MISO [Member]
Letters of Credit Outstanding, Amount	1.3
Uncommitted Credit Facility of $1 Million [Member] \| 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 [Member] \| 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	$ 110.6
Uncommitted Credit Facility of $150 Million [Member] \| Entergy Texas [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	0.6
Uncommitted Credit Facility of $160 Million [Member] \| 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
Uncommitted Credit Facility of $60 Million [Member] \| Entergy Louisiana [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 60.0
Line of Credit Facility, Commitment Fee Percentage	0.50%
Letters of Credit Outstanding, Amount	$ 38.5
Uncommitted Credit Facility of $60 Million [Member] \| Entergy Louisiana [Member] \| MISO [Member]
Letters of Credit Outstanding, Amount	37.0
Uncommitted Credit Facility of $60 Million [Member] \| Entergy Louisiana [Member] \| Non-MISO [Member]
Letters of Credit Outstanding, Amount	1.5
Uncommitted Credit Facility of $200 Million [Member] \| Entergy Arkansas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200.0
Line of Credit Facility, Commitment Fee Percentage	0.50%
Letters of Credit Outstanding, Amount	$ 118.3
Uncommitted Credit Facility of $100 Million [Member] \| Entergy Arkansas [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 100.0
Line of Credit Facility, Commitment Fee Percentage	0.78%
Letters of Credit Outstanding, Amount	$ 59.5
Uncommitted Credit Facility of $100 Million [Member] \| Entergy Arkansas [Member] \| Financial transmission rights [Member]
Letters of Credit Outstanding, Amount	$ 1.4
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%

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