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Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 2,800 | $ 3,878
Duke Energy Florida |  |
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 589 | $ 328
Unsecured Debt | Parent | Debt Maturing March 2024, 6.048% Coupon |  |
Debt Instrument [Line Items] |  |
Interest rate (as a percent) | 6.157% |
Current maturities of long-term debt | $ 1,000 |
Unsecured Debt | Parent | Debt Maturing April 2024, 3.75% Coupon |  |
Debt Instrument [Line Items] |  |
Interest rate (as a percent) | 3.75% |
Current maturities of long-term debt | $ 1,000 |
First Mortgage Bonds | Duke Energy Florida | Debt Maturing October 2073, 34.960% Coupon |  |
Debt Instrument [Line Items] |  |
Interest rate (as a percent) | 4.96% |
Current maturities of long-term debt | $ 200 |
Other |  |
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 600 |

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