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Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($)
$ in Millions
Total
Duke Energy Florida
Duke Energy Florida
Member's Equity
Duke Energy Florida
Net Unrealized Gains (Losses) on Available-for-Sale Securities
Beginning balance at Dec. 31, 2022   $ 9,023 $ 9,031 $ (8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) $ 1,836 810 810  
Other (1) 1 1  
Distributions to parent (2,346)      
Other comprehensive income (loss) (2) [1] 2   2
Ending balance at Sep. 30, 2023   9,836 9,842 (6)
Beginning balance at Jun. 30, 2023   9,488 9,494 (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 1,252 347 347  
Other 2 1 1  
Distributions to parent (793)      
Other comprehensive income (loss) (6) [1] 0    
Ending balance at Sep. 30, 2023   9,836 9,842 (6)
Beginning balance at Dec. 31, 2023   10,043 10,048 (5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 3,319 852 852  
Other (2) 2 2  
Distributions to parent (2,392) (125) (125)  
Other comprehensive income (loss) 4 [1] 0    
Ending balance at Sep. 30, 2024   10,772 10,777 (5)
Beginning balance at Jun. 30, 2024   10,550 10,555 (5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income (loss) 1,281 364 364  
Other (3) (17) (17)  
Distributions to parent (806) (125) (125)  
Other comprehensive income (loss) $ 7 [1] 0    
Ending balance at Sep. 30, 2024   $ 10,772 $ 10,777 $ (5)
[1] Net of income tax benefit of approximately $16 million and income tax expense of $69 million for the three months ended September 30, 2024, and 2023, respectively and approximately $16 million and $78 million of income tax expense for the nine months ended September 30, 2024, and 2023, respectively.