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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | $ 296 | $ 273
Total intangible assets, net | 282 | 265
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 | 232 | 210
Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 56 | 55
Accumulated amortization | (14) | (8)
Duke Energy Carolinas |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 97 | 84
Total intangible assets, net | 97 | 84
Duke Energy Carolinas | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 97 | 84
Progress Energy |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 143 | 133
Total intangible assets, net | 140 | 132
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 | 133 | 124
Progress Energy | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 5 | 4
Accumulated amortization | (3) | (1)
Duke Energy Progress |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 136 | 127
Total intangible assets, net | 136 | 127
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 | 133 | 124
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 | 6 | 6
Total intangible assets, net | 3 | 5
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 | 3 | 3
Accumulated amortization | (3) | (1)
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 | 16 | 20
Piedmont | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 22 | 22
Accumulated amortization | $ (6) | $ (2)

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