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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | $ 296 | $ 296
Total intangible assets, net | 277 | 282
Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 8 | 8
Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 241 | 232
Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 47 | 56
Accumulated amortization | (19) | (14)
Duke Energy Carolinas |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 103 | 97
Total intangible assets, net | 103 | 97
Duke Energy Carolinas | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 103 | 97
Progress Energy |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 146 | 143
Total intangible assets, net | 143 | 140
Progress Energy | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 5 | 5
Progress Energy | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 136 | 133
Progress Energy | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 5 | 5
Accumulated amortization | (3) | (3)
Duke Energy Progress |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 139 | 136
Total intangible assets, net | 139 | 136
Duke Energy Progress | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 2 | 2
Duke Energy Progress | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 136 | 133
Duke Energy Progress | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 1 | 1
Duke Energy Florida |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 7 | 6
Total intangible assets, net | 4 | 3
Duke Energy Florida | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 3 | 3
Duke Energy Florida | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 4 | 3
Accumulated amortization | (3) | (3)
Duke Energy Ohio |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 2 | 2
Total intangible assets, net | 2 | 2
Duke Energy Ohio | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 2 | 2
Duke Energy Indiana |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 2 | 2
Total intangible assets, net | 2 | 2
Duke Energy Indiana | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 2 | 2
Piedmont |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 22 | 22
Total intangible assets, net | 13 | 16
Piedmont | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 22 | 22
Accumulated amortization | $ (9) | $ (6)

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