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Other Income and Expenses, Net (Tables) | 12 Months Ended
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Dec. 31, 2023
Other Income and Expenses [Abstract] |
Schedule of Other Income and Expenses, Net | The components of Other income and expenses, net on the Consolidated Statements of Operations are as follows.
| Year Ended 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
Interest income | $ | 29 |  |  | $ | 10 |  |  | $ | 14 |  |  | $ | 9 |  |  | $ | 7 |  |  | $ | 25 |  |  | $ | 25 |  |  | $ | 19 |
AFUDC equity | 198 |  |  | 91 |  |  | 67 |  |  | 52 |  |  | 15 |  |  | 9 |  |  | 10 |  |  | 21 |
Post-in-service equity returns | 39 |  |  | 19 |  |  | 19 |  |  | 19 |  |  | — |  |  | 1 |  |  | — |  |  | — |
Nonoperating income, other | 332 |  |  | 118 |  |  | 101 |  |  | 44 |  |  | 56 |  |  | 6 |  |  | 41 |  |  | 17 |
Other income and expense, net | $ | 598 |  |  | $ | 238 |  |  | $ | 201 |  |  | $ | 124 |  |  | $ | 78 |  |  | $ | 41 |  |  | $ | 76 |  |  | $ | 57 |
| Year Ended December 31, 2022
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Interest income | $ | 27 |  |  | $ | 2 |  |  | $ | 24 |  |  | $ | 4 |  |  | $ | 20 |  |  | $ | 11 |  |  | $ | 15 |  |  | $ | 19 |
AFUDC equity | 197 |  |  | 98 |  |  | 68 |  |  | 52 |  |  | 16 |  |  | 7 |  |  | 13 |  |  | 11 |
Post-in-service equity returns | 34 |  |  | 14 |  |  | 18 |  |  | 18 |  |  | — |  |  | 1 |  |  | 1 |  |  | — |
Nonoperating income, other | 134 |  |  | 107 |  |  | 71 |  |  | 40 |  |  | 38 |  |  | — |  |  | 7 |  |  | 16 |
Other income and expense, net | $ | 392 |  |  | $ | 221 |  |  | $ | 181 |  |  | $ | 114 |  |  | $ | 74 |  |  | $ | 19 |  |  | $ | 36 |  |  | $ | 46 |
| Year Ended December 31, 2021 |  |
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Interest income | $ | 13 |  |  | $ | 4 |  |  | $ | 8 |  |  | $ | 6 |  |  | $ | 2 |  |  | $ | 4 |  |  | $ | 6 |  |  | $ | 19 |
AFUDC equity | 171 |  |  | 65 |  |  | 51 |  |  | 34 |  |  | 16 |  |  | 7 |  |  | 27 |  |  | 20 |
Post-in-service equity returns | 39 |  |  | 21 |  |  | 16 |  |  | 16 |  |  | — |  |  | 1 |  |  | 1 |  |  | — |
Nonoperating income, other | 413 |  |  | 180 |  |  | 140 |  |  | 87 |  |  | 53 |  |  | 6 |  |  | 8 |  |  | 16 |
Other income and expense, net | $ | 636 |  |  | $ | 270 |  |  | $ | 215 |  |  | $ | 143 |  |  | $ | 71 |  |  | $ | 18 |  |  | $ | 42 |  |  | $ | 55 |

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration