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v3.25.3

Organization and Basis of Presentation (Accounts Payable Finance Program) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Duke Energy (Parent) |  |  |  |
Supplier Finance Program, Obligation [Roll Forward] |  |  |  |
Confirmed obligations at beginning of period | $ 12 | $ 28 | $ 13 | $ 50
Invoices confirmed during the period | 15 | 26 | 47 | 146
Confirmed invoices paid during the period | (14) | (28) | (47) | (170)
Confirmed obligations at end of period | 13 | 26 | 13 | 26
Piedmont |  |  |  |
Supplier Finance Program, Obligation [Roll Forward] |  |  |  |
Confirmed obligations at beginning of period | 12 | 28 | 12 | 47
Invoices confirmed during the period | 15 | 25 | 45 | 144
Confirmed invoices paid during the period | (14) | (28) | (44) | (166)
Confirmed obligations at end of period | $ 13 | $ 25 | $ 13 | $ 25

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