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Condensed Consolidated Statements of Changes in Equity - Duke Energy Ohio - USD ($)
$ in Millions
Total
Additional Paid-in Capital
Retained Earnings
Duke Energy Ohio
Duke Energy Ohio
Common Stock
Duke Energy Ohio
Additional Paid-in Capital
Duke Energy Ohio
Retained Earnings
Beginning Balance at Dec. 31, 2023       $ 5,100 $ 762 $ 3,100 $ 1,238
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) $ 3,319     223     223
Other (2) $ 1 $ (2) 19   19  
Ending Balance at Sep. 30, 2024       5,342 762 3,119 1,461
Beginning Balance at Jun. 30, 2024       5,290 762 3,119 1,409
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 1,281     52     52
Other (3)   (3)        
Ending Balance at Sep. 30, 2024       5,342 762 3,119 1,461
Beginning Balance at Dec. 31, 2024 50,127     5,459 762 3,118 1,579
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 3,784     242     242
Contributions from parent       100   100  
Other (2)   4 1   1  
Ending Balance at Sep. 30, 2025 51,462     5,802 762 3,219 1,821
Beginning Balance at Jun. 30, 2025       5,624 762 3,119 1,743
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 1,421     78     78
Contributions from parent       100   100  
Other   $ (1) $ 1        
Ending Balance at Sep. 30, 2025 $ 51,462     $ 5,802 $ 762 $ 3,219 $ 1,821