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Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | $ 273 | $ 264
Accumulated amortization | (8) | (28)
Total intangible assets, net | 265 | 236
Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 8 | 8
Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 210 | 204
Natural gas, coal and power contracts |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount |  | 24
Accumulated amortization |  | (24)
Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 55 | 28
Accumulated amortization | (8) | (4)
Duke Energy Carolinas |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 84 | 73
Total intangible assets, net | 84 | 73
Duke Energy Carolinas | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 84 | 73
Progress Energy |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 133 | 136
Accumulated amortization | (1) |
Total intangible assets, net | 132 | 136
Progress Energy | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 5 | 5
Progress Energy | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 124 | 131
Progress Energy | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 4 |
Accumulated amortization | (1) |
Duke Energy Progress |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 127 | 133
Total intangible assets, net | 127 | 133
Duke Energy Progress | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 2 | 2
Duke Energy Progress | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 124 | 131
Duke Energy Progress | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 1 |
Duke Energy Florida |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 6 | 3
Accumulated amortization | (1) |
Total intangible assets, net | 5 | 3
Duke Energy Florida | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 3 | 3
Duke Energy Florida | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 3 |
Accumulated amortization | (1) |
Duke Energy Ohio |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 2 |
Total intangible assets, net | 2 |
Duke Energy Ohio | Renewable energy certificates |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 2 |
Duke Energy Indiana |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 2 | 26
Accumulated amortization |  | (24)
Total intangible assets, net | 2 | 2
Duke Energy Indiana | Emission allowances |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 2 | 2
Duke Energy Indiana | Natural gas, coal and power contracts |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount |  | 24
Accumulated amortization |  | $ (24)
Piedmont |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 22 |
Accumulated amortization | (2) |
Total intangible assets, net | 20 |
Piedmont | Other |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross carrying amount | 22 |
Accumulated amortization | $ (2) |

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