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Employee Benefit Plans (Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accumulated other comprehensive (income) loss      
Net amount recognized in accumulated other comprehensive income [1] $ (8) $ 1 $ 19
Progress Energy      
Accumulated other comprehensive (income) loss      
Net amount recognized in accumulated other comprehensive income 0 2 $ (5)
Pension Plan      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 147 5  
Accumulated other comprehensive (income) loss      
Deferred income tax benefit 3    
Amortization of prior year service credit 1    
Amortization of prior year service credit (12) (2)  
Net amount recognized in accumulated other comprehensive income (8) (2)  
Pension Plan | Duke Energy Carolinas      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 39 (14)  
Pension Plan | Progress Energy      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 33 8  
Accumulated other comprehensive (income) loss      
Amortization of prior year service credit 1    
Net amount recognized in accumulated other comprehensive income 1    
Pension Plan | Duke Energy Progress      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 1    
Pension Plan | Duke Energy Florida      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 31 9  
Pension Plan | Duke Energy Ohio      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 11 (3)  
Pension Plan | Duke Energy Indiana      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 6 (2)  
Accumulated other comprehensive (income) loss      
Amortization of prior year service credit (2)    
Net amount recognized in accumulated other comprehensive income (2)    
Pension Plan | Piedmont      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 16 13  
Other Post-Retirement Benefit Plans      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase (42) 73  
Regulatory liabilities, net (decrease) increase (76) 41  
Accumulated other comprehensive (income) loss      
Amortization of prior year service credit   1  
Amortization of prior year actuarial gain 1    
Net amount recognized in accumulated other comprehensive income 1 1  
Other Post-Retirement Benefit Plans | Duke Energy Carolinas      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase (62) 79  
Regulatory liabilities, net (decrease) increase (71) 62  
Other Post-Retirement Benefit Plans | Progress Energy      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 23 (7)  
Regulatory liabilities, net (decrease) increase 12    
Accumulated other comprehensive (income) loss      
Amortization of prior year actuarial gain   (1)  
Net amount recognized in accumulated other comprehensive income   (1)  
Other Post-Retirement Benefit Plans | Duke Energy Progress      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 17 (5)  
Regulatory liabilities, net (decrease) increase 12    
Other Post-Retirement Benefit Plans | Duke Energy Florida      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase 5    
Other Post-Retirement Benefit Plans | Duke Energy Ohio      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase (1) (2)  
Regulatory liabilities, net (decrease) increase (3) (4)  
Other Post-Retirement Benefit Plans | Duke Energy Indiana      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase (3) (2)  
Regulatory liabilities, net (decrease) increase $ (12) (8)  
Other Post-Retirement Benefit Plans | Piedmont      
Amounts Recognized in Regulatory Assets and Liabilities [Abstract]      
Regulatory assets, net increase   $ 1  
[1] Net of income tax expense of approximately $70 million, $40 million and $52 million for the years ended December 31, 2024, 2023 and 2022, respectively.