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Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility - USD ($)
Mar. 31, 2025
Mar. 30, 2025
Line of Credit Facility [Line Items]    
Facility size $ 10,000,000,000 $ 9,000,000,000
Commercial paper (2,103,000,000)  
Outstanding letters of credit (10,000,000)  
Tax-exempt bonds (81,000,000)  
Available capacity under the Master Credit Facility 7,806,000,000  
Duke Energy Carolinas    
Line of Credit Facility [Line Items]    
Facility size 1,300,000,000  
Commercial paper (300,000,000)  
Outstanding letters of credit (4,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 996,000,000  
Duke Energy Progress    
Line of Credit Facility [Line Items]    
Facility size 1,675,000,000  
Commercial paper (150,000,000)  
Outstanding letters of credit (1,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 1,524,000,000  
Duke Energy Florida    
Line of Credit Facility [Line Items]    
Facility size 1,425,000,000  
Commercial paper 0  
Outstanding letters of credit (3,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 1,422,000,000  
Duke Energy Ohio    
Line of Credit Facility [Line Items]    
Facility size 1,075,000,000  
Commercial paper (52,000,000)  
Outstanding letters of credit 0  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 1,023,000,000  
Duke Energy Indiana    
Line of Credit Facility [Line Items]    
Facility size 950,000,000  
Commercial paper (152,000,000)  
Outstanding letters of credit 0  
Tax-exempt bonds (81,000,000)  
Available capacity under the Master Credit Facility 717,000,000  
Piedmont    
Line of Credit Facility [Line Items]    
Facility size 1,050,000,000  
Commercial paper (68,000,000)  
Outstanding letters of credit 0  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility 982,000,000  
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants    
Line of Credit Facility [Line Items]    
Commercial paper (625,000,000)  
Duke Energy (Parent) | Duke Energy (Parent)    
Line of Credit Facility [Line Items]    
Facility size 2,525,000,000  
Commercial paper (1,381,000,000)  
Outstanding letters of credit (2,000,000)  
Tax-exempt bonds 0  
Available capacity under the Master Credit Facility $ 1,142,000,000