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v3.25.4

Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2026 | Dec. 31, 2025 | Oct. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Debt Instrument [Line Items] |  |  |  |  |  |  |
Current maturities of long-term debt |  | $ 7,104 |  |  |  | $ 7,104 | $ 4,349
Repayments of debt |  | 500 | $ 95 | $ 650 | $ 150 |  |
Subsequent Event |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayments of debt | $ 45 |  |  |  |  |  |
Piedmont |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Current maturities of long-term debt |  | 490 |  |  |  | 490 | 205
Duke Energy Florida |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Current maturities of long-term debt |  | 437 |  |  |  | 437 | 534
Duke Energy Progress |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Current maturities of long-term debt |  | 285 |  |  |  | 285 | 983
Duke Energy Carolinas |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Current maturities of long-term debt |  | $ 629 |  |  |  | $ 629 | $ 521
Unsecured Debt | Parent | Convertible Senior Notes Due April 2026 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 4.125% |  |  |  | 4.125% |
Current maturities of long-term debt |  | $ 1,725 |  |  |  | $ 1,725 |
Unsecured Debt | Parent | Unsecured Debt Maturing September 2026 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 2.65% |  |  |  | 2.65% |
Current maturities of long-term debt |  | $ 1,500 |  |  |  | $ 1,500 |
Unsecured Debt | Parent | Term Loan Facility Maturing September 2026 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 4.704% |  |  |  | 4.704% |
Current maturities of long-term debt |  | $ 2,000 |  |  |  | $ 2,000 |
Unsecured Debt | Piedmont | Term Loan Facility Maturing August 2026 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 4.611% |  |  |  | 4.611% |
Current maturities of long-term debt |  | $ 450 |  |  |  | $ 450 |
First Mortgage Bonds | Duke Energy Florida | Debt Maturing October 2073, 4.910% Coupon |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 3.981% |  |  |  | 3.981% |
Current maturities of long-term debt |  | $ 200 |  |  |  | $ 200 |
First Mortgage Bonds | Duke Energy Florida | Debt Maturing April 2074, 4.910% Coupon |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 3.981% |  |  |  | 3.981% |
Current maturities of long-term debt |  | $ 173 |  |  |  | $ 173 |
First Mortgage Bonds | Duke Energy Progress | Debt maturing October 2046 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 3.30% |  |  |  | 3.30% |
Current maturities of long-term debt |  | $ 200 |  |  |  | $ 200 |
First Mortgage Bonds | Duke Energy Carolinas | Debt Maturing December 2026, 2.950% Coupon |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (as a percent) |  | 2.95% |  |  |  | 2.95% |
Current maturities of long-term debt |  | $ 600 |  |  |  | $ 600 |
Other |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Current maturities of long-term debt |  | $ 256 |  |  |  | $ 256 |
First Mortgage Bonds | Duke Energy Florida | Debt Maturing October 2073, 4.910% Coupon |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term (in years) |  |  |  |  |  | 12 months |
First Mortgage Bonds | Duke Energy Florida | Debt Maturing April 2074, 4.910% Coupon |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term (in years) |  |  |  |  |  | 12 months |

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