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Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Variable Interest Entity [Line Items]      
Receivables from affiliated companies $ 2,232 $ 1,112  
Investments in equity method unconsolidated affiliates 353 492  
Other noncurrent assets 3,509 3,964  
Total Assets 186,343 176,893 $ 178,086
Other current liabilities 2,084 2,319  
Other noncurrent liabilities 1,556 1,393  
Duke Energy Ohio      
Variable Interest Entity [Line Items]      
Receivables from affiliated companies 447 112  
Other noncurrent assets 82 84  
Total Assets 12,768 12,216 11,506
Other current liabilities 67 65  
Other noncurrent liabilities 91 86  
Duke Energy Ohio | Affiliated entity      
Variable Interest Entity [Line Items]      
Receivables from affiliated companies 11 239  
Duke Energy Indiana      
Variable Interest Entity [Line Items]      
Receivables from affiliated companies 423 156  
Other noncurrent assets 323 325  
Total Assets 15,727 14,811 $ 14,654
Other current liabilities 183 184  
Other noncurrent liabilities 19 0  
Duke Energy Indiana | Affiliated entity      
Variable Interest Entity [Line Items]      
Receivables from affiliated companies 1 197  
Non-consolidated VIEs | Duke Energy Ohio      
Variable Interest Entity [Line Items]      
Total Assets   150  
Net assets   150  
Non-consolidated VIEs | Duke Energy Ohio | Affiliated entity      
Variable Interest Entity [Line Items]      
Receivables from affiliated companies   150  
Non-consolidated VIEs | Duke Energy Indiana      
Variable Interest Entity [Line Items]      
Total Assets   208  
Net assets   208  
Non-consolidated VIEs | Duke Energy Indiana | Affiliated entity      
Variable Interest Entity [Line Items]      
Receivables from affiliated companies   208  
Non-consolidated VIEs | Pipeline Investments      
Variable Interest Entity [Line Items]      
Investments in equity method unconsolidated affiliates   67  
Other noncurrent assets 17 43  
Total Assets 17 110  
Other current liabilities 2 4  
Other noncurrent liabilities   5  
Total liabilities 2 9  
Net assets $ 15 $ 101