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Variable Interest Entities (Narrative) (Details) - VIE primary beneficiary - USD ($)
1 Months Ended 9 Months Ended
Nov. 30, 2021
Sep. 30, 2023
Variable Interest Entities [Line Items]    
Variable interest entity, financial or other support, amount   $ 0
CRC    
Variable Interest Entities [Line Items]    
Percent of proceeds received as cash   75.00%
Percent of proceeds received as subordinated note   25.00%
Minimum equity balance required by Cinergy Receivables   $ 3,000,000
DECNCSF | Duke Energy Carolinas    
Variable Interest Entities [Line Items]    
Proceeds from issuance of senior secured bonds $ 237,000,000  
DEPNCSF | Duke Energy Progress    
Variable Interest Entities [Line Items]    
Proceeds from issuance of senior secured bonds $ 770,000,000