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Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 244 $ 319
Net amounts presented in Current Liabilities: Other 107 113
Net amounts presented in Other Noncurrent Liabilities: Other $ 90 $ 133
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Other
Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 131 $ 145
Offset (16) (29)
Cash collateral posted (8) (3)
Noncurrent Liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 113 174
Offset (22) (37)
Cash collateral posted (1) (4)
Duke Energy Carolinas    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 88 88
Net amounts presented in Current Liabilities: Other 46 40
Net amounts presented in Other Noncurrent Liabilities: Other $ 20 $ 8
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Other
Duke Energy Carolinas | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 56 $ 57
Offset (9) (15)
Cash collateral posted (1) (2)
Duke Energy Carolinas | Noncurrent Liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 32 31
Offset (11) (19)
Cash collateral posted (1) (4)
Progress Energy    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 48 58
Net amounts presented in Current Liabilities: Other 14 20
Net amounts presented in Other Noncurrent Liabilities: Other $ 16 $ 7
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Other
Progress Energy | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 21 $ 34
Offset (7) (14)
Progress Energy | Noncurrent Liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 27 24
Offset (11) (17)
Duke Energy Progress    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 47 57
Net amounts presented in Current Liabilities: Other 13 19
Net amounts presented in Other Noncurrent Liabilities: Other $ 16 $ 7
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other Other
Duke Energy Progress | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 20 $ 33
Offset (7) (14)
Duke Energy Progress | Noncurrent Liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 27 24
Offset (11) (17)
Duke Energy Florida    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 1 1
Net amounts presented in Current Liabilities: Other $ 1 $ 1
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Duke Energy Florida | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 1 $ 1
Duke Energy Ohio    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 1 1
Net amounts presented in Other Noncurrent Liabilities: Other 1 $ 1
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other
Duke Energy Ohio | Noncurrent Liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 1 $ 1
Duke Energy Indiana    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 9 3
Net amounts presented in Current Liabilities: Other $ 2 $ 2
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Current Liabilities: Other Current Liabilities: Other
Duke Energy Indiana | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 9 $ 3
Cash collateral posted (7) (1)
Piedmont    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 72 94
Net amounts presented in Current Liabilities: Other 19 16
Net amounts presented in Other Noncurrent Liabilities: Other 53 $ 78
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]   Current Liabilities: Other
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other
Piedmont | Current liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized 19 $ 16
Piedmont | Noncurrent Liabilities    
Offsetting Derivative Liabilities [Abstract]    
Gross amounts recognized $ 53 $ 78