Income Taxes (Effective Tax Rates) (Details)	3 Months Ended		6 Months Ended
Income Taxes (Effective Tax Rates) (Details)	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Tax Disclosure [Line Items]
Effective tax rate	10.60%	13.10%	11.50%	13.20%
Duke Energy Carolinas
Income Tax Disclosure [Line Items]
Effective tax rate	7.80%	10.90%	8.50%	11.20%
Progress Energy
Income Tax Disclosure [Line Items]
Effective tax rate	15.10%	16.60%	15.90%	16.60%
Duke Energy Progress
Income Tax Disclosure [Line Items]
Effective tax rate	12.40%	14.90%	13.60%	14.90%
Duke Energy Florida
Income Tax Disclosure [Line Items]
Effective tax rate	19.10%	19.50%	19.40%	19.50%
Duke Energy Ohio
Income Tax Disclosure [Line Items]
Effective tax rate	15.80%	17.20%	17.20%	17.00%
Duke Energy Indiana
Income Tax Disclosure [Line Items]
Effective tax rate	13.30%	16.70%	12.90%	16.90%
Piedmont
Income Tax Disclosure [Line Items]
Effective tax rate	44.40%	20.00%	19.50%	19.60%