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Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Loss Contingencies [Line Items]    
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Other (includes $54 at 2023 related to VIEs) Other (includes $54 at 2023 related to VIEs)
Environmental reserves    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation $ 73 $ 88
Environmental reserves | Duke Energy Carolinas    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation 24 23
Environmental reserves | Progress Energy    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation 19 19
Environmental reserves | Duke Energy Progress    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation 9 9
Environmental reserves | Duke Energy Florida    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation 10 10
Environmental reserves | Duke Energy Ohio    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation 21 36
Environmental reserves | Duke Energy Indiana    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation 2 2
Environmental reserves | Piedmont    
Loss Contingencies [Line Items]    
Reserves for Environmental Remediation $ 7 $ 7