Risk Management and Fair Values (Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location) (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
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Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
$ 64.0
|
$ 48.0
|
$ 64.0
|
$ 48.0
|
$ 11.0
|
$ 27.0
|
$ 7.0
|
$ 20.0
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset |
15.0
|
58.0
|
43.0
|
93.0
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |
(43.0)
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(66.0)
|
(87.0)
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(114.0)
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| Financial transmission rights [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Letters of Credit Outstanding, Amount |
6.0
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6.0
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2.0
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| Financial transmission rights [Member] | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(68.0)
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(68.0)
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(27.0)
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
4.0
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4.0
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0.0
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| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 64.0
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$ 64.0
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$ 27.0
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
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Prepaid Expense and Other Assets, Current
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Prepaid Expense and Other Assets, Current
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| Natural Gas Swaps | Not Designated as Hedging Instrument [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
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Other Liabilities, Current
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Other Liabilities, Current
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| Derivative Liability, Subject to Master Netting Arrangement, after Offset |
$ 4.0
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$ 4.0
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$ 5.0
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset |
(4.0)
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(4.0)
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(5.0)
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| Derivative Liability, Subject to Master Netting Arrangement, Asset Offset |
0.0
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0.0
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0.0
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| Interest Rate Swap | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
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$ (1.0)
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
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Deferred Credits and Other Liabilities
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
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$ 0.0
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| Derivative Liability, Subject to Master Netting Arrangement, after Offset |
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3.0
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| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
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$ 1.0
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
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Prepaid Expense and Other Assets, Current
|
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset |
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|
$ (3.0)
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| Derivative Liability, Subject to Master Netting Arrangement, Asset Offset |
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0.0
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| Prepayments And Other [Member] | Interest Rate Swap | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(1.0)
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(1.0)
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
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0.0
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| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 1.0
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$ 1.0
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
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Prepaid Expense and Other Assets, Current
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| Other Deferred Debits And Other Assets [Member] | Interest Rate Swap | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
$ (8.0)
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$ (8.0)
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
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0.0
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| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 8.0
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$ 8.0
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Other Assets, Noncurrent
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Other Assets, Noncurrent
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| Entergy Louisiana [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
$ 32.1
|
28.3
|
$ 32.1
|
28.3
|
7.1
|
16.7
|
3.4
|
8.6
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset |
6.0
|
38.2
|
21.9
|
55.1
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |
(22.7)
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(42.0)
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(48.2)
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(64.1)
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| Entergy Louisiana [Member] | Uncommitted Credit Facility of $125 Million [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Letters of Credit Outstanding, Amount |
111.1
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|
111.1
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| Entergy Louisiana [Member] | Financial transmission rights [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Letters of Credit Outstanding, Amount |
1.3
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1.3
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|
0.8
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| Entergy Louisiana [Member] | Financial transmission rights [Member] | Uncommitted Credit Facility of $125 Million [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Letters of Credit Outstanding, Amount |
1.3
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1.3
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| Entergy Louisiana [Member] | Financial transmission rights [Member] | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(32.1)
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(32.1)
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(16.8)
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
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0.0
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0.1
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| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 32.1
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$ 32.1
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$ 16.7
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
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Prepaid Expense and Other Assets, Current
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Prepaid Expense and Other Assets, Current
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| Entergy Mississippi [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
$ 0.7
|
1.4
|
$ 0.7
|
1.4
|
0.1
|
$ 0.4
|
(0.1)
|
(0.5)
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset |
2.5
|
3.1
|
10.7
|
5.5
|
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |
(3.4)
|
(3.1)
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(11.9)
|
(5.1)
|
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| Entergy Mississippi [Member] | Financial transmission rights [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Letters of Credit Outstanding, Amount |
2.5
|
|
2.5
|
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|
0.8
|
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| Entergy Mississippi [Member] | Financial transmission rights [Member] | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(0.9)
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(0.9)
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(0.4)
|
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
(0.2)
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(0.2)
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|
0.0
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| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 0.7
|
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$ 0.7
|
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$ 0.4
|
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
|
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Prepaid Expense and Other Assets, Current
|
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Prepaid Expense and Other Assets, Current
|
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| Entergy Mississippi [Member] | Natural Gas Swaps | Not Designated as Hedging Instrument [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
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| Derivative Liability, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
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Other Liabilities, Current
|
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Other Liabilities, Current
|
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| Derivative Liability, Subject to Master Netting Arrangement, after Offset |
$ 4.1
|
|
$ 4.1
|
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|
$ 5.3
|
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset |
4.1
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|
4.1
|
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| Derivative Liability, Subject to Master Netting Arrangement, Asset Offset |
0.0
|
|
0.0
|
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|
0.0
|
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| Entergy New Orleans [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
4.0
|
3.0
|
4.0
|
3.0
|
0.8
|
1.8
|
0.4
|
1.3
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset |
(0.6)
|
8.4
|
(2.6)
|
9.9
|
|
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |
(2.4)
|
(8.8)
|
(1.3)
|
(11.1)
|
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| Entergy New Orleans [Member] | Financial transmission rights [Member] | Not Designated as Hedging Instrument [Member] |
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(4.0)
|
|
(4.0)
|
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|
(1.8)
|
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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|
|
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| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
|
|
0.0
|
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|
0.0
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 4.0
|
|
$ 4.0
|
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|
$ 1.8
|
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| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
|
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Prepaid Expense and Other Assets, Current
|
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Prepaid Expense and Other Assets, Current
|
|
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| Entergy Arkansas [Member] |
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
$ 23.8
|
11.1
|
$ 23.8
|
11.1
|
2.4
|
$ 5.5
|
3.0
|
8.6
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset |
4.0
|
5.8
|
9.4
|
18.9
|
|
|
|
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |
(8.9)
|
(9.5)
|
(17.4)
|
(28.2)
|
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| Entergy Arkansas [Member] | Financial transmission rights [Member] |
|
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
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| Letters of Credit Outstanding, Amount |
1.4
|
|
1.4
|
|
|
0.1
|
|
|
| Entergy Arkansas [Member] | Financial transmission rights [Member] | Not Designated as Hedging Instrument [Member] |
|
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(23.8)
|
|
(23.8)
|
|
|
(5.5)
|
|
|
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
|
|
0.0
|
|
|
0.0
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 23.8
|
|
$ 23.8
|
|
|
$ 5.5
|
|
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
|
|
Prepaid Expense and Other Assets, Current
|
|
|
Prepaid Expense and Other Assets, Current
|
|
|
| Entergy Texas [Member] |
|
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| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value |
$ 3.1
|
3.9
|
$ 3.1
|
3.9
|
$ 0.9
|
$ 2.1
|
$ 0.4
|
$ 1.9
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included as Regulatory Liability/Asset |
2.3
|
1.8
|
3.8
|
3.8
|
|
|
|
|
| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |
(5.1)
|
$ (2.3)
|
(7.8)
|
$ (5.8)
|
|
|
|
|
| Entergy Texas [Member] | Financial transmission rights [Member] |
|
|
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|
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|
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Letters of Credit Outstanding, Amount |
0.6
|
|
0.6
|
|
|
0.1
|
|
|
| Entergy Texas [Member] | Financial transmission rights [Member] | Not Designated as Hedging Instrument [Member] |
|
|
|
|
|
|
|
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| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
(6.9)
|
|
(6.9)
|
|
|
(2.3)
|
|
|
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
3.8
|
|
3.8
|
|
|
0.2
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 3.1
|
|
$ 3.1
|
|
|
$ 2.1
|
|
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
|
|
Prepaid Expense and Other Assets, Current
|
|
|
Prepaid Expense and Other Assets, Current
|
|
|
| Entergy Texas [Member] | Interest Rate Swap | Not Designated as Hedging Instrument [Member] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
|
|
|
|
|
$ (0.5)
|
|
|
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
|
|
|
|
|
0.0
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
|
|
|
|
|
$ 0.5
|
|
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
|
|
|
|
|
Prepaid Expense and Other Assets, Current
|
|
|
| Entergy Texas [Member] | Prepayments And Other [Member] | Interest Rate Swap | Not Designated as Hedging Instrument [Member] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
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|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
$ (1.1)
|
|
$ (1.1)
|
|
|
|
|
|
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
|
|
0.0
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 1.1
|
|
$ 1.1
|
|
|
|
|
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Prepaid Expense and Other Assets, Current
|
|
Prepaid Expense and Other Assets, Current
|
|
|
|
|
|
| Entergy Texas [Member] | Other Deferred Debits And Other Assets [Member] | Interest Rate Swap | Not Designated as Hedging Instrument [Member] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, before Offset |
$ (7.5)
|
|
$ (7.5)
|
|
|
|
|
|
| Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] |
|
|
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, Liability Offset |
0.0
|
|
0.0
|
|
|
|
|
|
| Derivative Asset, Subject to Master Netting Arrangement, after Offset |
$ 7.5
|
|
$ 7.5
|
|
|
|
|
|
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] |
Other Assets, Noncurrent
|
|
Other Assets, Noncurrent
|
|
|
|
|
|