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Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 520 | $ 437
Net amounts presented in Current Liabilities: Other | 260 | 144
Net amounts presented in Current Liabilities: Other | 159 | 185
Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 293 | 193
Offset | (17) | $ (33)
Cash collateral posted | $ (16) |
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] | Current Liabilities: Other | Current Liabilities: Other
Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 227 | $ 244
Offset | (60) | (59)
Cash collateral posted | $ (8) | $ (16)
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other (includes $54 at 2023 related to VIEs) | Other (includes $54 at 2023 related to VIEs)
Duke Energy Carolinas |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 204 | $ 127
Net amounts presented in Current Liabilities: Other | 135 | 81
Net amounts presented in Current Liabilities: Other | 8 | 2
Duke Energy Carolinas | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 156 | 96
Offset | (9) | (15)
Cash collateral posted | (12) |
Duke Energy Carolinas | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 48 | 31
Offset | (33) | (29)
Cash collateral posted | (7) |
Progress Energy |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 137 | 66
Net amounts presented in Current Liabilities: Other | 88 | 18
Net amounts presented in Current Liabilities: Other | 11 |
Progress Energy | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 97 | 36
Offset | (8) | (18)
Cash collateral posted | (1) |
Progress Energy | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 40 | 30
Offset | (28) | (30)
Cash collateral posted | (1) |
Duke Energy Progress |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 137 | 48
Net amounts presented in Current Liabilities: Other | 88 |
Net amounts presented in Current Liabilities: Other | 11 |
Duke Energy Progress | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 97 | 18
Offset | (8) | (18)
Cash collateral posted | (1) |
Duke Energy Progress | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 40 | 30
Offset | (28) | (30)
Cash collateral posted | (1) |
Duke Energy Florida |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 19
Net amounts presented in Current Liabilities: Other |  | 19
Duke Energy Florida | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized |  | 19
Duke Energy Ohio |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 1 | 2
Net amounts presented in Current Liabilities: Other | 1 | 2
Duke Energy Ohio | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 1 | 2
Duke Energy Indiana |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 4 | 16
Duke Energy Indiana | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 4 | 16
Cash collateral posted | (4) |
Duke Energy Indiana | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Cash collateral posted |  | (16)
Piedmont |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 145 | 168
Net amounts presented in Current Liabilities: Other | 18 | 27
Net amounts presented in Current Liabilities: Other | 127 | 141
Piedmont | Current liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | 18 | 27
Piedmont | Noncurrent liabilities |  |
Offsetting Derivative Liabilities [Abstract] |  |
Gross amounts recognized | $ 127 | $ 141

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