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Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility - USD ($) | Mar. 31, 2025 | Mar. 30, 2025
--- | --- | ---
Line of Credit Facility [Line Items] |  |
Facility size | $ 10,000,000,000 | $ 9,000,000,000
Commercial paper | (2,103,000,000) |
Outstanding letters of credit | (10,000,000) |
Tax-exempt bonds | (81,000,000) |
Available capacity under the Master Credit Facility | 7,806,000,000 |
Duke Energy Carolinas |  |
Line of Credit Facility [Line Items] |  |
Facility size | 1,300,000,000 |
Commercial paper | (300,000,000) |
Outstanding letters of credit | (4,000,000) |
Tax-exempt bonds | 0 |
Available capacity under the Master Credit Facility | 996,000,000 |
Duke Energy Progress |  |
Line of Credit Facility [Line Items] |  |
Facility size | 1,675,000,000 |
Commercial paper | (150,000,000) |
Outstanding letters of credit | (1,000,000) |
Tax-exempt bonds | 0 |
Available capacity under the Master Credit Facility | 1,524,000,000 |
Duke Energy Florida |  |
Line of Credit Facility [Line Items] |  |
Facility size | 1,425,000,000 |
Commercial paper | 0 |
Outstanding letters of credit | (3,000,000) |
Tax-exempt bonds | 0 |
Available capacity under the Master Credit Facility | 1,422,000,000 |
Duke Energy Ohio |  |
Line of Credit Facility [Line Items] |  |
Facility size | 1,075,000,000 |
Commercial paper | (52,000,000) |
Outstanding letters of credit | 0 |
Tax-exempt bonds | 0 |
Available capacity under the Master Credit Facility | 1,023,000,000 |
Duke Energy Indiana |  |
Line of Credit Facility [Line Items] |  |
Facility size | 950,000,000 |
Commercial paper | (152,000,000) |
Outstanding letters of credit | 0 |
Tax-exempt bonds | (81,000,000) |
Available capacity under the Master Credit Facility | 717,000,000 |
Piedmont |  |
Line of Credit Facility [Line Items] |  |
Facility size | 1,050,000,000 |
Commercial paper | (68,000,000) |
Outstanding letters of credit | 0 |
Tax-exempt bonds | 0 |
Available capacity under the Master Credit Facility | 982,000,000 |
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants |  |
Line of Credit Facility [Line Items] |  |
Commercial paper | (625,000,000) |
Duke Energy (Parent) | Duke Energy (Parent) |  |
Line of Credit Facility [Line Items] |  |
Facility size | 2,525,000,000 |
Commercial paper | (1,381,000,000) |
Outstanding letters of credit | (2,000,000) |
Tax-exempt bonds | 0 |
Available capacity under the Master Credit Facility | $ 1,142,000,000 |

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