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Severance (Expenses) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense | $ (8) | $ (28) | $ 102
Operation, maintenance and other |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense |  |  | 97
Duke Energy Carolinas |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense | (2) | (11) | 53
Progress Energy |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense | (5) | (9) | 33
Duke Energy Progress |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense | (2) | (5) | 21
Duke Energy Florida |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense | $ (3) | (4) | 12
Duke Energy Ohio |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense |  | (2) | 3
Duke Energy Indiana |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense |  | (4) | 6
Piedmont |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Severance expense |  | $ (2) | $ 4

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