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Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 433 | $ 472
Net amounts presented in Current Liabilities: Other | 433 | 472
Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 115 | 184
Gross amounts offset |  | (11)
Net amounts presented in Current Liabilities: Other | 115 | 173
Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 318 | 288
Gross amounts offset |  | (12)
Net amounts presented in Current Liabilities: Other | 318 | 276
Duke Energy Carolinas |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 37 | 35
Net amounts presented in Current Liabilities: Other | 37 | 35
Duke Energy Carolinas | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 36 | 26
Gross amounts offset |  | (6)
Net amounts presented in Current Liabilities: Other | 36 | 20
Duke Energy Carolinas | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 1 | 9
Gross amounts offset |  | (8)
Net amounts presented in Current Liabilities: Other | 1 | 1
Progress Energy |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 24
Net amounts presented in Current Liabilities: Other |  | 24
Progress Energy | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 19
Gross amounts offset |  | (5)
Net amounts presented in Current Liabilities: Other |  | 14
Progress Energy | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 5
Gross amounts offset |  | (5)
Duke Energy Progress |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 10
Net amounts presented in Current Liabilities: Other |  | 10
Duke Energy Progress | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 5
Gross amounts offset |  | (5)
Duke Energy Progress | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 5
Gross amounts offset |  | (5)
Duke Energy Florida |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 14
Net amounts presented in Current Liabilities: Other |  | 14
Duke Energy Florida | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 14
Net amounts presented in Current Liabilities: Other |  | 14
Duke Energy Ohio |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 3 | 5
Duke Energy Ohio | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 1 | 1
Net amounts presented in Current Liabilities: Other | 1 | 1
Duke Energy Ohio | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 2 | 4
Net amounts presented in Current Liabilities: Other | 2 | 4
Duke Energy Indiana |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 27
Net amounts presented in Current Liabilities: Other |  | 27
Duke Energy Indiana | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 13
Net amounts presented in Current Liabilities: Other |  | 13
Duke Energy Indiana | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 14
Net amounts presented in Current Liabilities: Other |  | 14
Piedmont |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 173 | 139
Net amounts presented in Current Liabilities: Other | 173 | 139
Piedmont | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 24 | 21
Net amounts presented in Current Liabilities: Other | 24 | 21
Piedmont | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 149 | 118
Net amounts presented in Current Liabilities: Other | $ 149 | $ 118

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