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Regulatory Matters (Duke Energy Florida Narrative) (Details) $ in Millions |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 15, 2024 solarFacility | Jul. 01, 2020 USD ($) plant MW | Dec. 31, 2026 USD ($) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jan. 15, 2025 USD ($) | Dec. 27, 2024 USD ($) | Aug. 01, 2024 USD ($) | Jul. 31, 2024 USD ($)
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  | $ 14,379 | $ 14,220 |  |  |  |  |
Capital expenditures |  |  |  | 14,002 | 12,263 | $ 12,622 |  |  |  |
Regulatory assets |  |  |  | 1,934 | 2,739 |  |  |  |  |
Duke Energy Florida |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Other Noncurrent Assets: Regulatory assets |  |  |  | 2,106 | 2,064 |  |  |  |  |
Capital expenditures |  |  |  | 2,698 | 2,449 | $ 2,529 |  |  |  |
Regulatory assets |  |  |  | 102 | 1,022 |  |  |  |  |
Duke Energy Florida | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  | 75 |  |  |  |  |  |
Regulatory assets |  |  |  | 4 | $ 936 |  |  |  |  |
Duke Energy Florida | Solar Plant |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated cost of generation facilities to be built |  | $ 1,100 |  |  |  |  |  |  |  |
Duke Energy Florida | FPSC |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Number of solar plants petition for approval | plant |  | 10 |  |  |  |  |  |  |  |
Solar generation capacity plants (in MW) | MW |  | 749 |  |  |  |  |  |  |  |
Investment in transmission and distribution |  |  |  |  |  |  | $ 7,000 |  |  |
Duke Energy Florida | Hurricane Ian | FPSC | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Storm reserves |  |  |  |  |  |  |  | $ 1,100 | $ 132 | $ 63
Duke Energy Florida | 2024 Florida Rate Case | FPSC |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  |  | $ (203) |  |  |  |  |  |
Number of solar plants petition for approval | solarFacility | 12 |  |  |  |  |  |  |  |  |
Duke Energy Florida | 2024 Florida Rate Case | FPSC | Forecast |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  | $ (59) |  |  |  |  |  |  |
Duke Energy Florida | 2024 Florida Rate Case | FPSC | Minimum |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) | 9.30% |  |  |  |  |  |  |  |  |
Duke Energy Florida | 2024 Florida Rate Case | FPSC | Maximum |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) | 11.30% |  |  |  |  |  |  |  |  |
Duke Energy Florida | 2024 Florida Rate Case | FPSC | Weighted Average |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) | 10.30% |  |  |  |  |  |  |  |  |
Approved capital structure (as a percent) | 53.00% |  |  |  |  |  |  |  |  |

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