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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Line Items]      
Net proceeds related to the sale of certain tax credits $ 723 $ 558 $ 28
Alternative minimum tax   69  
Tax credits 23 43 63
PTCs      
Income Tax Disclosure [Line Items]      
Tax credits     28
Duke Energy Carolinas      
Income Tax Disclosure [Line Items]      
Deferred tax asset 913 449  
Proceeds from sale of tax credits 723 558  
Net proceeds related to the sale of certain tax credits 551 440 0
Tax credits 11 23 11
Duke Energy Carolinas | Sale of Nuclear Power PTCs      
Income Tax Disclosure [Line Items]      
Decrease in deferred tax asset 530 428  
Duke Energy Progress      
Income Tax Disclosure [Line Items]      
Deferred tax asset 152 73  
Net proceeds related to the sale of certain tax credits 102 71 0
Tax credits 6 12 7
Duke Energy Progress | Sale of Nuclear Power PTCs      
Income Tax Disclosure [Line Items]      
Decrease in deferred tax asset 83 65  
Duke Energy Florida      
Income Tax Disclosure [Line Items]      
Net proceeds related to the sale of certain tax credits 69 47 28
Tax credits 3 4 $ 39
Duke Energy Florida | Sale of Nuclear Power PTCs      
Income Tax Disclosure [Line Items]      
Decrease in deferred tax asset $ 69 43  
Domestic Tax Jurisdiction      
Income Tax Disclosure [Line Items]      
Favorable adjustment amounts   114  
State      
Income Tax Disclosure [Line Items]      
Favorable adjustment amounts   $ 6