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Business Segments (Narrative) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) segment Segment | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | Segment |  |  |  |  |  |  |  |  | 2 |  |
Operating Revenues | $ 7,212 | $ 7,994 | $ 6,578 | $ 7,276 | $ 7,351 | $ 7,842 | $ 6,564 | $ 7,011 | $ 29,060 | $ 28,768 | $ 24,621
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |  |  |  | $ 6,488 | 6,753 | 5,780
Duke Energy Ohio |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 2 |  |
Operating Revenues |  |  |  |  |  |  |  |  | $ 2,507 | $ 2,514 | $ 2,037

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