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Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 593 | $ 472
Net amounts presented in Current Liabilities: Other | 593 | 472
Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 190 | 184
Gross amounts offset | (19) | (11)
Net amounts presented in Current Liabilities: Other | 171 | 173
Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 403 | 288
Gross amounts offset | (19) | (12)
Net amounts presented in Current Liabilities: Other | 384 | 276
Duke Energy Carolinas |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 41 | 35
Net amounts presented in Current Liabilities: Other | 41 | 35
Duke Energy Carolinas | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 32 | 26
Gross amounts offset | (1) | (6)
Net amounts presented in Current Liabilities: Other | 31 | 20
Duke Energy Carolinas | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 9 | 9
Gross amounts offset | (9) | (8)
Net amounts presented in Current Liabilities: Other |  | 1
Progress Energy |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 43 | 24
Net amounts presented in Current Liabilities: Other | 43 | 24
Progress Energy | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 33 | 19
Gross amounts offset | (1) | (5)
Net amounts presented in Current Liabilities: Other | 32 | 14
Progress Energy | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 10 | 5
Gross amounts offset | (10) | (5)
Duke Energy Progress |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 11 | 10
Net amounts presented in Current Liabilities: Other | 11 | 10
Duke Energy Progress | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 1 | 5
Gross amounts offset | (1) | (5)
Duke Energy Progress | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 10 | 5
Gross amounts offset | (10) | (5)
Duke Energy Florida |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 33 | 14
Net amounts presented in Current Liabilities: Other | 33 | 14
Duke Energy Florida | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 33 | 14
Net amounts presented in Current Liabilities: Other | 33 | 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 | 21 | 27
Net amounts presented in Current Liabilities: Other | 21 | 27
Duke Energy Indiana | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 21 | 13
Gross amounts offset | (17) |
Net amounts presented in Current Liabilities: Other | 4 | 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 | 193 | 139
Net amounts presented in Current Liabilities: Other | 193 | 139
Piedmont | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 25 | 21
Net amounts presented in Current Liabilities: Other | 25 | 21
Piedmont | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 168 | 118
Net amounts presented in Current Liabilities: Other | $ 168 | $ 118

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