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Commitments and Contingencies (Narrative) (Details)
$ in Millions
Jun. 16, 2021
people
Mar. 31, 2023
USD ($)
case
Dec. 31, 2022
USD ($)
Texas Storm Uri Tort Litigation | Pending Litigation      
Loss Contingencies [Line Items]      
Loss contingency, pending claims, number | case   5  
Duke Energy Carolinas | Ruben Villano, et al. v. Duke Energy Carolinas, LLC | Pending Litigation      
Loss Contingencies [Line Items]      
Number of individuals | people 9    
Number of survivors | people 4    
Number of deceased individuals | people 5    
Duke Energy Carolinas | Asbestos-related Injuries and Damages Claims      
Loss Contingencies [Line Items]      
Asbestos-related injuries and damages reserves | $   $ 451 $ 457
Probable insurance recoveries | $   595 595
Duke Energy and Duke Energy Carolinas | ASU 2016-13      
Loss Contingencies [Line Items]      
Reserve for credit losses for insurance receivables | $   $ 12 $ 12