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Regulatory Matters (Duke Energy Progress Narrative) (Details) |  |  |  |  |  |  |  |  | 12 Months Ended | 24 Months Ended |  |  |  |  |
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Feb. 01, 2026 USD ($) | Nov. 20, 2025 | Nov. 11, 2025 USD ($) | Apr. 08, 2025 | Feb. 07, 2025 USD ($) MW | Aug. 18, 2023 USD ($) | Apr. 16, 2023 | Oct. 06, 2022 | Nov. 19, 2027 USD ($) | Aug. 17, 2027 USD ($) | Nov. 19, 2026 USD ($) | Aug. 17, 2026 USD ($) | Dec. 31, 2025 USD ($) | Aug. 17, 2025 USD ($) | Dec. 31, 2024 USD ($) | Aug. 17, 2024 USD ($) | Dec. 31, 2023 USD ($) | Nov. 19, 2027 USD ($) | Jan. 30, 2026 MW | Nov. 21, 2025 MW | Oct. 30, 2025 MW | Sep. 30, 2025 USD ($) | Mar. 31, 2024 MW
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  |  |  |  | $ (4,000,000) |  | $ 38,000,000 |  | $ 85,000,000 |  |  |  |  |  |
Operation, maintenance and other |  |  |  |  |  |  |  |  |  |  |  |  | 6,698,000,000 |  | 5,389,000,000 |  | 5,625,000,000 |  |  |  |  |  |
Face amount of debt instrument issued |  |  |  |  |  |  |  |  |  |  |  |  | 7,005,000,000 |  | 7,740,000,000 |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 15,682,000,000 |  | 14,521,000,000 |  |  |  |  |  |  |  |
Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  | 6,000,000 |  | 29,000,000 |  |  |  |  |  |
Operation, maintenance and other |  |  |  |  |  |  |  |  |  |  |  |  | 1,455,000,000 |  | 1,388,000,000 |  | 1,379,000,000 |  |  |  |  |  |
Face amount of debt instrument issued |  |  |  |  |  |  |  |  |  |  |  |  | 2,561,000,000 |  | 677,000,000 |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 4,807,000,000 |  | 4,570,000,000 |  |  |  |  |  |  |  |
Duke Energy Progress | Storm Recovery Bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 461,000,000 |
Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  |  |  |  | (11,000,000) |  | 31,000,000 |  | 44,000,000 |  |  |  |  |  |
Operation, maintenance and other |  |  |  |  |  |  |  |  |  |  |  |  | 2,002,000,000 |  | 1,740,000,000 |  | $ 1,774,000,000 |  |  |  |  |  |
Face amount of debt instrument issued |  |  |  |  |  |  |  |  |  |  |  |  | 2,243,000,000 |  | 1,000,000,000 |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,609,000,000 |  | $ 6,592,000,000 |  |  |  |  |  |  |  |
Duke Energy Carolinas | Storm Recovery Bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt instrument issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 582,000,000 |
NCUC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Combined Cycle Plants, in Megawatts | MW |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 850 |  |  | 850
PSCSC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Combined Cycle Plants, in Megawatts | MW |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,365 |  |
PSCSC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Combined Cycle Plants, in Megawatts | MW |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,170 |  |
Nuclear Regulatory Commission |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating license extension (in years) |  |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |
2022 North Carolina Rate Case | NCUC | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proposed rate period (in years) |  |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved rate increase (decrease) amount by state commission |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 126,000,000 |  | $ 233,000,000 |  |  |  |  |  |  |
Settlement amount |  |  |  |  |  | $ 12,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
MYRP period (in years) |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) |  |  |  |  |  | 9.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of assets and other charges |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,000,000 |  |  |  |  |  |  |  |  |  |
Operation, maintenance and other |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000 |  |  |  |  |  |  |  |  |  |
Requested return on equity (as a percent) |  | 10.95% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) |  |  |  |  |  | 53.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Requested return on equity (as a percent) |  | 53.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2022 North Carolina Rate Case | NCUC | Duke Energy Progress | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  |  |  |  |  |  |  | $ 200,000,000 |  | $ 529,000,000 |  |  |  |  |  |  | $ 729,000,000 |  |  |  |  |
Approved rate increase (decrease) amount by state commission |  |  |  |  |  |  |  |  |  | $ 494,000,000 |  | $ 135,000,000 |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease), percent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.10% |  |  |  |  |
2022 North Carolina Rate Case, Retail Allocated | NCUC | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount |  |  |  |  |  | $ 3,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Person County Combined Cycle CPCN | NCUC | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  |  |  | $ 113,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Combined Cycle Plants, in Megawatts | MW |  |  |  |  | 1,360 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Requested rate increase (decrease), percent |  |  |  |  | 2.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Person County Combined Cycle CPCN | NCUC | Duke Energy Progress | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Combined Cycle Plants, in Megawatts | MW |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,720 |  |  |  |
Person County Combined Cycle CPCN | NCUC | NCEMC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Combined Cycle Plants, in Megawatts | MW |  |  |  |  | 225 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm reserves |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Progress | North Carolina Storms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 71,000,000 |  |  |  |  |  |  |  |  |  |
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm reserves |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 |  |  |  |  |  |  |  |  |  |
Hurricanes Helene, Debby and Milton | NCUC | Duke Energy Carolinas | North Carolina Storms |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total noncurrent regulatory liabilities |  |  |  |  |  |  |  |  |  |  |  |  | $ 136,000,000 |  |  |  |  |  |  |  |  |  |
2025 South Carolina Rate Case | PSCSC | Duke Energy Progress | Forecast | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved rate increase (decrease) amount by state commission | $ 40,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) | 9.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved capital structure (as a percent) | 53.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2025 South Carolina Rate Case | PSCSC | Duke Energy Carolinas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved rate increase (decrease) amount by state commission |  |  | $ 19,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved return on equity (as a percent) |  |  | 9.99% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approved capital structure (as a percent) |  |  | 53.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Robinson Subsequent License Renewal | Nuclear Regulatory Commission | Duke Energy Progress |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating license extension (in years) |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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