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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