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Income Taxes (Effective Tax Rates) (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 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 13.10% 13.70% 13.20% 13.70%
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 10.90% 10.60% 11.20% 11.00%
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 16.60% 16.70% 16.60% 16.70%
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 14.90% 14.10% 14.90% 14.40%
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 19.50% 19.90% 19.50% 19.90%
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 17.20% 15.50% 17.00% 16.20%
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 16.70% 17.40% 16.90% 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 20.00% 25.00% 19.60% 17.80%