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Debt and Credit Facilities (Narrative) (Details) € in Millions |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 24, 2024 USD ($) | Mar. 26, 2024 USD ($) | Jun. 30, 2024 USD ($) | Apr. 30, 2024 USD ($) | Apr. 30, 2024 EUR (€) | Apr. 25, 2024 USD ($) | Mar. 31, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt |  |  | $ 6,365,000,000 |  |  |  |
Master Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility size |  |  | 9,000,000,000 |  |  |  | $ 9,000,000,000
Duke Energy (Parent) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt |  |  | 3,565,000,000 |  |  |  |
Duke Energy Florida |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt |  |  | 173,000,000 |  |  |  |
Duke Energy Florida | Master Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility size |  |  | 875,000,000 |  |  |  |
Duke Energy Progress |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt |  |  | 677,000,000 |  |  |  |
Duke Energy Progress | Master Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Facility size |  |  | 1,500,000,000 |  |  |  |
Term Loan Facility | Duke Energy (Parent) | Duke Energy Term Loan Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of debt |  |  | $ 500,000,000 |  |  |  |
Facility size |  | $ 700,000,000 |  |  |  |  |
Extension period (in years) |  | 30 days |  |  |  |  |
Facility term (in years) |  | 364 days |  |  |  |  |
Borrowing amount | $ 500,000,000 |  |  |  |  |  |
Unsecured Debt | Senior Notes 3.75% Due 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt | € |  |  |  |  | € 750 |  |
Interest rate (as a percent) |  |  |  | 3.75% | 3.75% |  |
Secured Debt | Variable Rate Term Loan Due March 2024 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayment of debt |  |  |  | $ 1,000,000,000 |  |  |
Storm Recovery Bonds | Duke Energy Progress |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt |  |  |  |  |  | $ 177,000,000 |
Storm Recovery Bonds | Duke Energy Progress | 5.404% Storm Recovery Bonds |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Sale of debt |  |  |  | $ 177,000,000 |  |  |

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