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

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