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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Line Items] |  |  |
Alternative minimum tax | $ 133 | $ 69 |
Net proceeds related to the sale of certain tax credits | 558 | 28 | $ 0
Duke Energy Carolinas |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred tax asset | 449 |  |
Tax credits | 558 |  |
Net proceeds related to the sale of certain tax credits | 440 | 0 | 0
Duke Energy Carolinas | Sale of Nuclear Power PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Increase (decrease) in deferred tax asset | 428 |  |
Duke Energy Progress |  |  |
Income Tax Disclosure [Line Items] |  |  |
Deferred tax asset | 73 |  |
Net proceeds related to the sale of certain tax credits | 71 | 0 | 0
Duke Energy Progress | Sale of Nuclear Power PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Increase (decrease) in deferred tax asset | 65 |  |
Duke Energy Florida |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net proceeds related to the sale of certain tax credits | 47 | $ 28 | $ 0
Duke Energy Florida | Sale of Nuclear Power PTCs |  |  |
Income Tax Disclosure [Line Items] |  |  |
Increase (decrease) in deferred tax asset | $ 43 |  |

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