v3.26.1
Debt and Credit Facilities (Narrative) (Details)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended
Apr. 15, 2026
USD ($)
shares
Mar. 31, 2026
USD ($)
d
$ / shares
Sep. 30, 2025
USD ($)
Dec. 31, 2025
$ / shares
Debt Instrument [Line Items]        
Debt issuances   $ 2,275    
Common stock, par value (in usd per share) | $ / shares   $ 0.001   $ 0.001
Duke Energy (Parent)        
Debt Instrument [Line Items]        
Debt issuances   $ 1,500    
Duke Energy Florida        
Debt Instrument [Line Items]        
Debt issuances   $ 275    
Convertible Senior Notes | Convertible Senior Notes Due April 2026        
Debt Instrument [Line Items]        
Interest rate   3.00%    
Debt issuances   $ 1,500    
Number of trading days | d   20    
Number of consecutive trading days | d   30    
Stock price trigger (percent)   130.00%    
Threshold product of stock price and conversion rate (percent)   98.00%    
Conversion rate   0.0062277    
Premium over stock price (percent)   22.50%    
Convertible Senior Notes | 4.125% Convertible Senior notes Due April 2026 | Subsequent event        
Debt Instrument [Line Items]        
Interest rate 4.125%      
Repayments of convertible debt $ 1,700      
Shares issued on debt conversion | shares 1.4      
Term Loan Facility | Line of Credit | Duke Energy (Parent) | Delayed Draw Term Loan Facility        
Debt Instrument [Line Items]        
Facility size     $ 2,000  
Facility term     364 days  
Borrowing amount     $ 2,000  
Term Loan Facility | Line of Credit | Duke Energy Carolinas and Duke Energy Progress        
Debt Instrument [Line Items]        
Facility term   364 days    
Current maturities   $ 1,000    
Term Loan Facility | Line of Credit | Duke Energy Carolinas        
Debt Instrument [Line Items]        
Facility size   1,500    
Term Loan Facility | Line of Credit | Duke Energy Progress        
Debt Instrument [Line Items]        
Facility size   $ 300    
Term Loan Facility | Line of Credit | Piedmont | Term Loan Facility maturing August 2026        
Debt Instrument [Line Items]        
Facility size     450  
Repayments of debt     $ 150  
Facility term     364 days  
Borrowing amount     $ 450