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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | The following tables show the carrying amount and accumulated amortization of intangible assets included in Other within Other Noncurrent Assets on the Consolidated Balance Sheets of the Duke Energy Registrants at December 31, 2024, and 2023.
| December 31, 2024
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Emission allowances | $ | 8 |  |  | $ | — |  |  | $ | 5 |  |  | $ | 2 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 2 |  |  | $ | — |
Renewable energy certificates | 241 |  |  | 103 |  |  | 136 |  |  | 136 |  |  | — |  |  | 2 |  |  | — |  |  | — |
Other | 47 |  |  | — |  |  | 5 |  |  | 1 |  |  | 4 |  |  | — |  |  | — |  |  | 22 |
Total gross carrying amounts | 296 |  |  | 103 |  |  | 146 |  |  | 139 |  |  | 7 |  |  | 2 |  |  | 2 |  |  | 22 |
Accumulated amortization – other | (19) |  |  | — |  |  | (3) |  |  | — |  |  | (3) |  |  | — |  |  | — |  |  | (9) |
Total intangible assets, net | $ | 277 |  |  | $ | 103 |  |  | $ | 143 |  |  | $ | 139 |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 2 |  |  | $ | 13 |
| December 31, 2023 |  |
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Emission allowances | $ | 8 |  |  | $ | — |  |  | $ | 5 |  |  | $ | 2 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 2 |  |  | $ | — |
Renewable energy certificates | 232 |  |  | 97 |  |  | 133 |  |  | 133 |  |  | — |  |  | 2 |  |  | — |  |  | — |
Other | 56 |  |  | — |  |  | 5 |  |  | 1 |  |  | 3 |  |  | — |  |  | — |  |  | 22 |
Total gross carrying amounts | 296 |  |  | 97 |  |  | 143 |  |  | 136 |  |  | 6 |  |  | 2 |  |  | 2 |  |  | 22 |
Accumulated amortization – other | (14) |  |  | — |  |  | (3) |  |  | — |  |  | (3) |  |  | — |  |  | — |  |  | (6) |
Total intangible assets, net | $ | 282 |  |  | $ | 97 |  |  | $ | 140 |  |  | $ | 136 |  |  | $ | 3 |  |  | $ | 2 |  |  | $ | 2 |  |  | $ | 16 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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