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Income Taxes (Effective Tax Rates) (Details)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 12.10% 13.40%
Duke Energy Carolinas    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 9.00% 11.50%
Progress Energy    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 16.80% 16.50%
Duke Energy Progress    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 14.50% 15.00%
Duke Energy Florida    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 19.90% 19.40%
Duke Energy Ohio    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 18.00% 16.80%
Duke Energy Indiana    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 12.50% 17.30%
Piedmont    
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]    
Effective tax rate 20.70% 19.60%