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Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 3,330 | $ 3,878
Other debt securities |  |
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 330 |
Duke Energy (Parent) | Debt Maturing April 2023, 2.875% Coupon | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Interest Rate | 2.875% |
Current maturities of long-term debt | $ 350 |
Duke Energy (Parent) | Debt Maturing June 2023, 2.048% Coupon | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.631% |
Current maturities of long-term debt | $ 500 |
Duke Energy (Parent) | Debt Maturing October 2023, 3.950% Coupon | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.95% |
Current maturities of long-term debt | $ 400 |
Duke Energy (Parent) | Debt Maturing March 2024, 5.385% Coupon | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Interest Rate | 5.385% |
Current maturities of long-term debt | $ 1,000 |
Duke Energy Ohio |  |
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 475 | 475
Duke Energy Ohio | Debt Maturing October 2023, 4.879% Coupon | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.879% |
Current maturities of long-term debt | $ 150 |
Duke Energy Ohio | Debt Maturing September 2023, 3.800% Coupon | First Mortgage Bonds |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.80% |
Current maturities of long-term debt | $ 300 |
Duke Energy Carolinas |  |
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | 18 | 1,018
Duke Energy Progress |  |
Debt Instrument [Line Items] |  |
Current maturities of long-term debt | $ 370 | $ 369
Duke Energy Progress | Debt Maturing September 2023, 3.375% Coupon | First Mortgage Bonds |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.375% |
Current maturities of long-term debt | $ 300 |

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