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Income Taxes (Effective Tax Rates) (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
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 11.20% 2.80% 12.50% 9.00%
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 7.70% 4.90% 9.80% 8.00%
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 16.10% 15.70% 16.40% 16.20%
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 12.90% 11.80% 14.10% 13.00%
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 20.50% 20.80% 19.90% 20.30%
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 11.90% 14.90% 15.80% 15.80%
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 15.70% 18.50% 16.30% 17.80%
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 29.40% 26.30% 18.40% 17.20%