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Other Income and Expenses, Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income $ 63 $ 29 $ 27
AFUDC equity 233 198 197
Post-in-service equity returns 52 39 34
Nonoperating income, other 313 332 134
Other income and expense, net 661 598 392
Duke Energy Carolinas      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 9 10 2
AFUDC equity 113 91 98
Post-in-service equity returns 31 19 14
Nonoperating income, other 94 118 107
Other income and expense, net 247 238 221
Progress Energy      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 18 14 24
AFUDC equity 74 67 68
Post-in-service equity returns 20 19 18
Nonoperating income, other 123 101 71
Other income and expense, net 235 201 181
Duke Energy Progress      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 14 9 4
AFUDC equity 61 52 52
Post-in-service equity returns 20 19 18
Nonoperating income, other 48 44 40
Other income and expense, net 143 124 114
Duke Energy Florida      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 4 7 20
AFUDC equity 13 15 16
Nonoperating income, other 69 56 38
Other income and expense, net 86 78 74
Duke Energy Ohio      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 8 25 11
AFUDC equity 7 9 7
Post-in-service equity returns 1 1 1
Nonoperating income, other 3 6  
Other income and expense, net 19 41 19
Duke Energy Indiana      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 5 25 15
AFUDC equity 19 10 13
Post-in-service equity returns 1   1
Nonoperating income, other 37 41 7
Other income and expense, net 62 76 36
Piedmont      
Component Of Other Income Expense Nonoperating [Line Items]      
Interest income 19 19 19
AFUDC equity 21 21 11
Nonoperating income, other 14 17 16
Other income and expense, net $ 54 $ 57 $ 46