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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Income Tax Disclosure [Line Items] |  |  |
Net proceeds related to the sale of certain tax credits | $ 723 | $ 558 | $ 28
Alternative minimum tax |  | 69 |
Tax credits | 23 | 43 | 63
PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credits |  |  | 28
Duke Energy Carolinas |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred tax asset | 913 | 449 |
Proceeds from sale of tax credits | 723 | 558 |
Net proceeds related to the sale of certain tax credits | 551 | 440 | 0
Tax credits | 11 | 23 | 11
Duke Energy Carolinas | Sale of Nuclear Power PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Decrease in deferred tax asset | 530 | 428 |
Duke Energy Progress |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred tax asset | 152 | 73 |
Net proceeds related to the sale of certain tax credits | 102 | 71 | 0
Tax credits | 6 | 12 | 7
Duke Energy Progress | Sale of Nuclear Power PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Decrease in deferred tax asset | 83 | 65 |
Duke Energy Florida |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net proceeds related to the sale of certain tax credits | 69 | 47 | 28
Tax credits | 3 | 4 | $ 39
Duke Energy Florida | Sale of Nuclear Power PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Decrease in deferred tax asset | $ 69 | 43 |
Domestic Tax Jurisdiction |  |  |
Income Tax Disclosure [Line Items] |  |  |
Favorable adjustment amounts |  | 114 |
State |  |  |
Income Tax Disclosure [Line Items] |  |  |
Favorable adjustment amounts |  | $ 6 |

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