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Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | $ 1,336 | $ 320
Net amounts presented in Current Assets: Other | 1,336 | 320
Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 868 | 204
Gross amounts offset | (331) | (25)
Net amounts presented in Current Assets: Other | 537 | 179
Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 468 | 116
Gross amounts offset | (242) | (23)
Net amounts presented in Current Assets: Other | 226 | 93
Duke Energy Carolinas |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 484 | 162
Net amounts presented in Current Assets: Other | 484 | 162
Duke Energy Carolinas | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 268 | 99
Gross amounts offset | (193) | (16)
Net amounts presented in Current Assets: Other | 75 | 83
Duke Energy Carolinas | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 216 | 63
Gross amounts offset | (125) | (15)
Net amounts presented in Current Assets: Other | 91 | 48
Progress Energy |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 368 | 124
Net amounts presented in Current Assets: Other | 368 | 124
Progress Energy | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 203 | 74
Gross amounts offset | (137) | (9)
Net amounts presented in Current Assets: Other | 66 | 65
Progress Energy | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 165 | 50
Gross amounts offset | (117) | (8)
Net amounts presented in Current Assets: Other | 48 | 42
Duke Energy Progress |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 368 | 124
Net amounts presented in Current Assets: Other | 368 | 124
Duke Energy Progress | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 203 | 74
Gross amounts offset | (137) | (9)
Net amounts presented in Current Assets: Other | 66 | 65
Duke Energy Progress | Noncurrent assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 165 | 50
Gross amounts offset | (117) | (8)
Net amounts presented in Current Assets: Other | 48 | 42
Duke Energy Ohio |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 5 | 2
Duke Energy Ohio | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 5 | 2
Net amounts presented in Current Assets: Other | 5 | 2
Duke Energy Indiana |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 141 | 23
Net amounts presented in Current Assets: Other | 141 | 23
Duke Energy Indiana | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized | 141 | 23
Net amounts presented in Current Assets: Other | $ 141 | 23
Piedmont |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized |  | 3
Net amounts presented in Current Assets: Other |  | 3
Piedmont | Current assets |  |
Offsetting Derivative Assets [Abstract] |  |
Gross amounts recognized |  | 3
Net amounts presented in Current Assets: Other |  | $ 3

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