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Regulatory Matters (Duke Energy Narrative) (Details) customer in Thousands, $ in Millions |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 27, 2021 contention | Jul. 28, 2021 | Jun. 07, 2021 | Jun. 06, 2021 | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Oct. 31, 2022 customer
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  | $ 12,622 | $ 11,419 | $ 9,752 |
Operation, maintenance and other |  |  |  |  | 5,625 | 5,734 | 5,703 |
Regulatory assets |  |  |  |  | 17,266 | 18,130 |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  | $ 13,618 | 14,645 |  |
Nuclear Regulatory Commission |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Operating license extension (in years) |  |  |  |  | 20 years |  |  |
Duke Energy Ohio |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Limit of total capital (as a percent) |  |  |  |  | 30.00% |  |  |
Capital expenditures |  |  |  |  | $ 939 | 850 | 848 |
Operation, maintenance and other |  |  |  |  | 478 | 523 | 479 |
Regulatory assets |  |  |  |  | 749 | 684 |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  | $ 676 | 581 |  |
Duke Energy Kentucky |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Required minimum equity capital structure (as a percent) |  |  |  |  | 35.00% |  |  |
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Number of customers impacted | customer |  |  |  |  |  |  |  | 950
Other Noncurrent Assets: Regulatory assets |  |  |  |  | $ 87 |  |  |
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events | Minimum |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Storm costs incurred |  |  |  |  | 95 |  |  |
Capital expenditures |  |  |  |  | 8 |  |  |
Duke Energy Carolinas |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Operation, maintenance and other |  |  |  |  | 1,774 | 1,892 | 1,833 |
Regulatory assets |  |  |  |  | 5,480 | 5,388 |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  | 3,916 | 4,293 |  |
Duke Energy Carolinas | Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Comment period (in years) |  | 60 days |  |  |  |  |  |
Number of contentions | contention | 3 |  |  |  |  |  |  |
Duke Energy Carolinas | Oconee Nuclear Station Subsequent License Renewal | Nuclear Regulatory Commission | Oconee |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Operating license extension (in years) |  |  | 20 years |  |  |  |  |
Operating license (in years) |  |  | 80 years | 60 years |  |  |  |
Duke Energy Carolinas | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  | 32 |  |  |
Duke Energy Progress |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Operation, maintenance and other |  |  |  |  | 1,379 | 1,475 | $ 1,467 |
Regulatory assets |  |  |  |  | 5,488 | 5,414 |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  | $ 4,546 | 4,724 |  |
Duke Energy Progress | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  |  |  | $ 55 |  |

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