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Variable Interest Entities (Narrative) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Variable Interest Entity [Line Items] |  |  |  |
Inventory (includes $462 at 2023 related to VIEs) |  | $ 4,292,000,000 | $ 3,584,000,000 |
Accounts payable |  | 4,228,000,000 | 4,754,000,000 |
Duke Energy Carolinas |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Inventory (includes $462 at 2023 related to VIEs) |  | 1,484,000,000 | 1,164,000,000 |
Accounts payable |  | 1,183,000,000 | 1,472,000,000 |
Duke Energy Progress |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Inventory (includes $462 at 2023 related to VIEs) |  | 1,227,000,000 | 1,006,000,000 |
Accounts payable |  | 634,000,000 | 601,000,000 |
Duke Energy Ohio |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Inventory (includes $462 at 2023 related to VIEs) |  | 179,000,000 | 144,000,000 |
Accounts payable |  | 338,000,000 | 380,000,000 |
Duke Energy Florida |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Inventory (includes $462 at 2023 related to VIEs) |  | 674,000,000 | 573,000,000 |
Accounts payable |  | $ 738,000,000 | 880,000,000 |
CRC |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Variation in credit losses (as a percent) |  | 10.00% |  |
Variation in discount rates (as a percent) |  | 20.00% |  |
Consolidated VIEs |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Financial support |  | $ 0 | $ 0 | $ 0
Inventory (includes $462 at 2023 related to VIEs) |  | 462,000,000 |  |
Accounts payable |  | 188,000,000 |  |
Consolidated VIEs | Duke Energy Florida |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Inventory (includes $462 at 2023 related to VIEs) |  | 462,000,000 |  |
Accounts payable |  | $ 188,000,000 |  |
Consolidated VIEs | CRC |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Proceeds received as cash (as a percent) |  | 75.00% |  |
Proceeds received as subordinated note (as a percent) |  | 25.00% |  |
Minimum Equity Balance required by Cinergy Receivables |  | $ 3,000,000 |  |
Consolidated VIEs | DECNCSF | Duke Energy Carolinas |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Proceeds from issuance of senior secured bonds | $ 237,000,000 |  |  |
Consolidated VIEs | DEPNCSF | Duke Energy Progress |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Proceeds from issuance of senior secured bonds | $ 770,000,000 |  |  |
Non-consolidated VIEs | CRC | Duke Energy Ohio |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Discount rate (as a percent) |  | 1.00% |  |

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