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Variable Interest Entities (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2024 | Mar. 31, 2024 | Nov. 30, 2021 | Mar. 31, 2024 | Dec. 31, 2023 | Apr. 25, 2024 | Apr. 01, 2024 | Feb. 29, 2024
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  | $ 3,475,000,000 |  | $ 3,475,000,000 |  |  |  |
Duke Energy Carolinas |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  | 1,000,000,000 |  | 1,000,000,000 |  |  |  |
Duke Energy Progress |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  | 500,000,000 |  | 500,000,000 |  |  |  |
Duke Energy Progress | Storm Recovery Bonds | Subsequent event |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  |  |  |  |  | $ 177,000,000 |  |
Duke Energy Progress | 5.404% Storm Recovery Bonds | Storm Recovery Bonds | Subsequent event |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances | $ 177,000,000 |  |  |  |  |  |  |
Duke Energy (Parent) |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  | 1,250,000,000 |  | 1,250,000,000 |  |  |  |
Duke Energy Indiana |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  | 300,000,000 |  | 300,000,000 |  |  |  |
Duke Energy Ohio |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Debt issuances |  | 425,000,000 |  | 425,000,000 |  |  |  |
VIE primary beneficiary |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Variable interest entity, financial or other support, amount |  |  |  | 0 | $ 0 |  |  |
VIE primary beneficiary | Duke Energy Florida | DEFR Accounts Receivable Securitization Facility Maturing April 2024 | Secured Debt | Subsequent event |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Repayments of debt | $ 325,000,000 |  |  |  |  |  |  |
VIE primary beneficiary | CRC |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Repayments of debt |  | 350,000,000 |  |  |  |  |  |
Accounts receivable from securitization |  | $ 0 |  | $ 0 | 663,000,000 |  |  | $ 682,000,000
Percent of proceeds received as cash |  | 75.00% |  | 75.00% |  |  |  |
Percent of proceeds received as subordinated note |  | 25.00% |  | 25.00% |  |  |  |
Minimum equity balance required by Cinergy Receivables |  | $ 3,000,000 |  | $ 3,000,000 |  |  |  |
VIE primary beneficiary | CRC | Duke Energy Indiana |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Accounts receivable from securitization |  |  |  |  |  |  |  | 316,000,000
VIE primary beneficiary | CRC | Duke Energy Ohio |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Accounts receivable from securitization |  |  |  |  |  |  |  | $ 366,000,000
VIE primary beneficiary | DECNCSF | Duke Energy Carolinas |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of senior secured bonds |  |  | $ 237,000,000 |  |  |  |  |
VIE primary beneficiary | DEPNCSF | Duke Energy Progress |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of senior secured bonds |  |  | $ 770,000,000 |  |  |  |  |
VIE primary beneficiary | DEFR | Duke Energy Florida |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Accounts receivable from securitization |  | $ 467,000,000 |  | $ 467,000,000 | $ 532,000,000 |  |  |
VIE primary beneficiary | DEFR | Duke Energy Florida | Subsequent event |  |  |  |  |  |  |  |
Variable Interest Entities [Line Items] |  |  |  |  |  |  |  |
Accounts receivable from securitization |  |  |  |  |  |  | $ 459,000,000 |

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