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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | $ 314 | $ 296
Total intangible assets, net | 291 | 277
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 | 259 | 241
Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 47 | 47
Accumulated amortization | (23) | (19)
Duke Energy Carolinas |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 115 | 103
Total intangible assets, net | 115 | 103
Duke Energy Carolinas | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 115 | 103
Progress Energy |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 153 | 146
Total intangible assets, net | 149 | 143
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 | 143 | 136
Progress Energy | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 5 | 5
Accumulated amortization | (4) | (3)
Duke Energy Progress |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 146 | 139
Total intangible assets, net | 146 | 139
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 | 143 | 136
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 | 7
Total intangible assets, net | 3 | 4
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 | 4
Accumulated amortization | (4) | (3)
Duke Energy Ohio |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 1 | 2
Total intangible assets, net | 1 | 2
Duke Energy Ohio | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 1 | 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 | 10 | 13
Piedmont | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Total gross carrying amounts | 22 | 22
Accumulated amortization | $ (12) | $ (9)

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