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Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Variable Interest Entities [Line Items]    
Receivables from affiliated companies $ 2,161 $ 1,112
Investments in equity method unconsolidated affiliates 477 492
Other noncurrent assets 3,732 3,964
Total Assets 183,566 176,893
Other current liabilities 2,122 2,319
Other 1,731 1,393
Duke Energy Ohio    
Variable Interest Entities [Line Items]    
Other noncurrent assets 94 84
Total Assets 12,611 12,216
Other current liabilities 68 65
Other 94 86
Duke Energy Ohio | Affiliated Entity    
Variable Interest Entities [Line Items]    
Receivables from affiliated companies 11 239
Duke Energy Ohio | VIE not primary beneficiary    
Variable Interest Entities [Line Items]    
Investments in equity method unconsolidated affiliates 0 0
Other noncurrent assets 0 0
Total Assets 0 150
Other current liabilities 0 0
Other 0 0
Total liabilities 0 0
Net assets 0 150
Duke Energy Ohio | VIE not primary beneficiary | Affiliated Entity    
Variable Interest Entities [Line Items]    
Receivables from affiliated companies 0 150
Duke Energy Indiana    
Variable Interest Entities [Line Items]    
Other noncurrent assets 384 325
Total Assets 15,690 14,811
Other current liabilities 198 184
Other 15 0
Duke Energy Indiana | Affiliated Entity    
Variable Interest Entities [Line Items]    
Receivables from affiliated companies 5 197
Duke Energy Indiana | VIE not primary beneficiary    
Variable Interest Entities [Line Items]    
Investments in equity method unconsolidated affiliates 0 0
Other noncurrent assets 0 0
Total Assets 0 208
Other current liabilities 0 0
Other 0 0
Total liabilities 0 0
Net assets 0 208
Duke Energy Indiana | VIE not primary beneficiary | Affiliated Entity    
Variable Interest Entities [Line Items]    
Receivables from affiliated companies 0 208
Pipeline Investments | VIE not primary beneficiary    
Variable Interest Entities [Line Items]    
Investments in equity method unconsolidated affiliates 55 67
Other noncurrent assets 30 43
Total Assets 85 110
Other current liabilities 4 4
Other 1 5
Total liabilities 5 9
Net assets 80 101
Pipeline Investments | VIE not primary beneficiary | Affiliated Entity    
Variable Interest Entities [Line Items]    
Receivables from affiliated companies $ 0 $ 0