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Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 207 $ 202 $ 213
Write-Offs (164) (131) (162)
Credit Loss Expense 106 97 99
Other Adjustments 45 39 52
Ending balance 194 207 202
Duke Energy Carolinas      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 69 56 68
Write-Offs (52) (55) (71)
Credit Loss Expense 26 39 35
Other Adjustments 12 29 24
Ending balance 55 69 56
Progress Energy      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 73 74 81
Write-Offs (62) (73) (84)
Credit Loss Expense 39 51 48
Other Adjustments 15 21 29
Ending balance 65 73 74
Duke Energy Progress      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 44 44 44
Write-Offs (37) (45) (41)
Credit Loss Expense 16 25 12
Other Adjustments 15 20 29
Ending balance 38 44 44
Duke Energy Florida      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 29 31 36
Write-Offs (25) (28) (42)
Credit Loss Expense 23 26 37
Ending balance 27 29 31
Duke Energy Ohio      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 43 9 6
Write-Offs (21)    
Credit Loss Expense 15 3 3
Other Adjustments 14 31  
Ending balance 51 43 9
Duke Energy Indiana      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 15 5 4
Write-Offs (13)    
Credit Loss Expense 13 2 1
Other Adjustments   8  
Ending balance 15 15 5
Piedmont      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 7 8 11
Write-Offs (17) (3) (8)
Credit Loss Expense 14 2 5
Other Adjustments 2    
Ending balance $ 6 $ 7 $ 8