v3.25.2
Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation $ 73 $ 73
Duke Energy Carolinas    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 32 24
Progress Energy    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 19 19
Duke Energy Progress    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 9 9
Duke Energy Florida    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 10 10
Duke Energy Ohio    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 14 21
Duke Energy Indiana    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation 2 2
Piedmont    
Environmental Matters Details [Line Items]    
Reserves for Environmental Remediation $ 6 $ 7