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Other Income and Expenses, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | $ 51 | $ 63 | $ 29
AFUDC equity | 328 | 233 | 198
Post-in-service equity returns | 47 | 52 | 39
Nonoperating income, other | 243 | 313 | 332
Other income and expense, net | 669 | 661 | 598
Duke Energy Carolinas |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 17 | 9 | 10
AFUDC equity | 144 | 113 | 91
Post-in-service equity returns | 26 | 31 | 19
Nonoperating income, other | 71 | 94 | 118
Other income and expense, net | 258 | 247 | 238
Progress Energy |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 47 | 18 | 14
AFUDC equity | 117 | 74 | 67
Post-in-service equity returns | 19 | 20 | 19
Nonoperating income, other | 104 | 123 | 101
Other income and expense, net | 287 | 235 | 201
Duke Energy Progress |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 39 | 14 | 9
AFUDC equity | 100 | 61 | 52
Post-in-service equity returns | 19 | 20 | 19
Nonoperating income, other | 38 | 48 | 44
Other income and expense, net | 196 | 143 | 124
Duke Energy Florida |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 9 | 4 | 7
AFUDC equity | 17 | 13 | 15
Post-in-service equity returns | 0 | 0 | 0
Nonoperating income, other | 64 | 69 | 56
Other income and expense, net | 90 | 86 | 78
Duke Energy Ohio |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 3 | 8 | 25
AFUDC equity | 16 | 7 | 9
Post-in-service equity returns | 0 | 1 | 1
Nonoperating income, other | 5 | 3 | 6
Other income and expense, net | 24 | 19 | 41
Duke Energy Indiana |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 6 | 5 | 25
AFUDC equity | 34 | 19 | 10
Post-in-service equity returns | 2 | 1 | 0
Nonoperating income, other | 19 | 37 | 41
Other income and expense, net | 61 | 62 | 76
Piedmont |  |  |
Component Of Other Income Expense Nonoperating [Line Items] |  |  |
Interest income | 19 | 19 | 19
AFUDC equity | 17 | 21 | 21
Post-in-service equity returns | 0 | 0 | 0
Nonoperating income, other | 5 | 14 | 17
Other income and expense, net | $ 41 | $ 54 | $ 57

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