v3.26.1
Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Revolving Credit Facility
Mar. 31, 2026
USD ($)
Line of Credit Facility [Line Items]  
Facility size $ 10,000,000,000
Commercial paper (1,914,000,000)
Outstanding letters of credit (7,000,000)
Tax-exempt bonds (81,000,000)
Available capacity under the Master Credit Facility 7,998,000,000
Duke Energy (Parent)  
Line of Credit Facility [Line Items]  
Facility size 3,150,000,000
Commercial paper (207,000,000)
Outstanding letters of credit (2,000,000)
Tax-exempt bonds 0
Available capacity under the Master Credit Facility 2,941,000,000
Duke Energy Carolinas  
Line of Credit Facility [Line Items]  
Facility size 1,950,000,000
Commercial paper (772,000,000)
Outstanding letters of credit (4,000,000)
Tax-exempt bonds 0
Available capacity under the Master Credit Facility 1,174,000,000
Duke Energy Florida  
Line of Credit Facility [Line Items]  
Facility size 700,000,000
Commercial paper (79,000,000)
Outstanding letters of credit 0
Tax-exempt bonds 0
Available capacity under the Master Credit Facility 621,000,000
Duke Energy Progress  
Line of Credit Facility [Line Items]  
Facility size 1,575,000,000
Commercial paper (627,000,000)
Outstanding letters of credit (1,000,000)
Tax-exempt bonds 0
Available capacity under the Master Credit Facility 947,000,000
Duke Energy Ohio  
Line of Credit Facility [Line Items]  
Facility size 1,075,000,000
Commercial paper (79,000,000)
Outstanding letters of credit 0
Tax-exempt bonds 0
Available capacity under the Master Credit Facility 996,000,000
Duke Energy Indiana  
Line of Credit Facility [Line Items]  
Facility size 750,000,000
Commercial paper (150,000,000)
Outstanding letters of credit 0
Tax-exempt bonds (81,000,000)
Available capacity under the Master Credit Facility 519,000,000
Piedmont  
Line of Credit Facility [Line Items]  
Facility size 800,000,000
Commercial paper 0
Outstanding letters of credit 0
Tax-exempt bonds 0
Available capacity under the Master Credit Facility 800,000,000
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants  
Line of Credit Facility [Line Items]  
Commercial paper $ (625,000,000)