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Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | $ 525 | $ 795
Derivative Asset, Current | 144 | 518
Net amounts presented in Current Assets: Other | 304 | 116
Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 161 | 582
Offset | $ (17) | (33)
Cash collateral received |  | $ 31
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] | Current Assets: Other | Current Assets: Other
Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | $ 364 | $ 213
Offset | $ (60) | (59)
Cash collateral received |  | $ 38
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other | Other
Duke Energy Carolinas |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | $ 93 | $ 330
Derivative Asset, Current | 28 | 193
Net amounts presented in Current Assets: Other | 24 | 64
Duke Energy Carolinas | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 37 | 226
Offset | (9) | (15)
Cash collateral received |  | 18
Duke Energy Carolinas | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 56 | 104
Offset | (32) | (29)
Cash collateral received |  | 11
Progress Energy |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 196 | 248
Derivative Asset, Current | 84 | 110
Net amounts presented in Current Assets: Other | 76 | 51
Progress Energy | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 92 | 140
Offset | (8) | (18)
Cash collateral received |  | 12
Progress Energy | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 104 | 108
Offset | (28) | (30)
Cash collateral received |  | 27
Duke Energy Progress |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 79 | 230
Derivative Asset, Current | 1 | 92
Net amounts presented in Current Assets: Other | 42 | 51
Duke Energy Progress | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 9 | 122
Offset | (8) | (18)
Cash collateral received |  | 12
Duke Energy Progress | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 70 | 108
Offset | (28) | (30)
Cash collateral received |  | 27
Duke Energy Florida |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 117 | 17
Derivative Asset, Current | 83 | 17
Net amounts presented in Current Assets: Other | 34 |
Duke Energy Florida | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 83 | 17
Duke Energy Florida | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 34 |
Duke Energy Ohio |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 2 | 5
Derivative Asset, Current | 2 | 5
Duke Energy Ohio | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 2 | 5
Duke Energy Indiana |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 55 | 110
Derivative Asset, Current | 28 | 110
Net amounts presented in Current Assets: Other | 27 |
Duke Energy Indiana | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 28 | $ 110
Duke Energy Indiana | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 27 |
Piedmont |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 1 |
Derivative Asset, Current | 1 |
Piedmont | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | $ 1 |

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