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Regulatory Matters (Duke Energy Narrative) (Details) customer in Thousands, $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 30, 2022 | Sep. 30, 2022 customer | Aug. 05, 2022 USD ($) | Oct. 13, 2021
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Capital expenditures |  | $ 11,419 | $ 9,752 | $ 10,421 |  |  |  |
Regulatory assets |  | $ 18,130 | 14,637 |  |  |  |  |
Storm Cost Securitization Legislation | NCUC |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Reduction in CO2 emissions (as a percent) |  |  |  |  |  |  |  | 70.00%
Solar storage as long term purchase agreements (as a percent) |  |  |  |  | 45.00% |  |  |
Duke Energy Ohio |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Limit of total capital (as a percent) |  | 30.00% |  |  |  |  |  |
Capital expenditures |  | $ 850 | 848 | $ 834 |  |  |  |
Regulatory assets |  | $ 684 | 707 |  |  |  |  |
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 |  |
Duke Energy Carolinas and Duke Energy Progress | Natural Disasters and Other Casualty Events | Minimum |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Storm costs incurred | $ 100 |  |  |  |  |  |  |
Capital expenditures | 9 |  |  |  |  |  |  |
Regulatory assets | 83 |  |  |  |  |  |  |
Duke Energy Progress |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Regulatory assets |  | $ 5,414 | 4,651 |  |  |  |  |
Duke Energy Progress | Storm Cost Securitization Legislation | PSCSC |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Deferred storm costs |  |  |  |  |  |  | $ 223 |
Duke Energy Progress | Natural Disasters and Other Casualty Events | Minimum |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Regulatory assets | 43 |  |  |  |  |  |  |
Duke Energy Carolinas |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Regulatory assets |  | $ 5,388 | $ 3,479 |  |  |  |  |
Duke Energy Carolinas | Natural Disasters and Other Casualty Events | Minimum |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |
Regulatory assets | $ 40 |  |  |  |  |  |  |

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