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Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details) - USD ($) $ in Millions |  | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 25, 2025 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2026 | Apr. 16, 2025 | Mar. 21, 2025 | Dec. 31, 2024
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Capital expenditures |  | $ 6,428 | $ 6,204 |  |  |  |
Duke Energy Carolinas and Duke Energy Progress | Hurricanes Debby and Helene |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Storm restoration costs incurred |  | 812 |  |  |  |  |
Capital expenditures, cumulative |  | 468 |  |  |  |  |
Duke Energy Carolinas and Duke Energy Progress | Hurricanes Debby and Helene | Forecast |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Capital expenditures |  |  |  | $ 70 |  |  |
Duke Energy Carolinas |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Capital expenditures |  | 2,145 | 1,949 |  |  |  |
Duke Energy Carolinas | Hurricanes Debby and Helene |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Storm restoration costs incurred |  | 530 |  |  |  |  |
Increase (reduction) in regulatory liabilities |  | (82) |  |  |  |  |
Capital expenditures, cumulative |  | 378 |  |  |  |  |
Duke Energy Progress |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Capital expenditures |  | 1,524 | $ 1,373 |  |  |  |
Duke Energy Progress | Hurricanes Debby and Helene |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Storm restoration costs incurred |  | 282 |  |  |  |  |
Increase (reduction) in regulatory liabilities |  | 34 |  |  |  |  |
Capital expenditures, cumulative |  | $ 90 |  |  |  |  |
PSCSC | Duke Energy Carolinas | Hurricane Helene |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Storm reserves |  |  |  |  |  | $ 25 |
Total storm restoration costs | $ 556 |  |  |  |  |  |
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | North Carolina Storms |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Storm reserves |  |  |  |  | $ 584 |  | $ 200
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | North Carolina Storms |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |
Storm reserves |  |  |  |  | $ 461 |  | $ 100

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