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Derivatives and Hedging (Offsetting Liabilities) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 248 | $ 319
Derivative liabilities, current | $ 90 | $ 113
Derivative liabilities, current, location | Current Liabilities: Other | Current Liabilities: Other
Derivative liabilities, noncurrent | $ 105 | $ 133
Derivative liabilities, noncurrent, location | Other | Other
Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 117 | $ 145
Offset | (24) | (29)
Cash collateral posted | (3) | (3)
Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 131 | 174
Offset | (26) | (37)
Cash collateral posted |  | (4)
Duke Energy Carolinas |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 79 | 88
Derivative liabilities, current | 31 | 40
Derivative liabilities, noncurrent | 22 | 8
Duke Energy Carolinas | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 43 | 57
Offset | (12) | (15)
Cash collateral posted | 0 | (2)
Duke Energy Carolinas | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 36 | 31
Offset | (14) | (19)
Cash collateral posted |  | (4)
Progress Energy |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 54 | 58
Derivative liabilities, current | 16 | 20
Derivative liabilities, noncurrent | 13 | 7
Progress Energy | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 29 | 34
Offset | (13) | (14)
Cash collateral posted | 0 | 0
Progress Energy | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 25 | 24
Offset | (12) | (17)
Cash collateral posted |  | 0
Duke Energy Progress |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 36 | 57
Derivative liabilities, current | 4 | 19
Derivative liabilities, noncurrent | 7 | 7
Duke Energy Progress | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 17 | 33
Offset | (13) | (14)
Cash collateral posted | 0 | 0
Duke Energy Progress | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 19 | 24
Offset | (12) | (17)
Cash collateral posted |  | 0
Duke Energy Florida |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 18 | 1
Derivative liabilities, current | 12 | 1
Derivative liabilities, noncurrent | 6 | 0
Duke Energy Florida | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 12 | 1
Offset | 0 | 0
Cash collateral posted | 0 | 0
Duke Energy Florida | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 6 | 0
Offset | 0 | 0
Cash collateral posted |  | 0
Duke Energy Ohio |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 0 | 1
Derivative liabilities, current | 0 | 0
Derivative liabilities, noncurrent | 0 | 1
Duke Energy Ohio | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 0 | 0
Offset | 0 | 0
Cash collateral posted | 0 | 0
Duke Energy Ohio | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 0 | 1
Offset | 0 | 0
Cash collateral posted |  | 0
Duke Energy Indiana |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 7 | 3
Derivative liabilities, current | (1) | 2
Derivative liabilities, noncurrent | 5 | 0
Duke Energy Indiana | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 2 | 3
Offset | 0 | 0
Cash collateral posted | (3) | (1)
Duke Energy Indiana | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 5 | 0
Offset | 0 | 0
Cash collateral posted |  | 0
Piedmont |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 78 | 94
Derivative liabilities, current | 17 | 16
Derivative liabilities, noncurrent | 61 | 78
Piedmont | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 17 | 16
Offset | 0 | 0
Cash collateral posted | 0 | 0
Piedmont | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 61 | 78
Offset | $ 0 | 0
Cash collateral posted |  | $ 0

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