v3.25.2
Fair Value Measurements (Other Fair Value Disclosure) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt $ 83,960 $ 80,689
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 77,104 73,440
Piedmont Natural Gas and Progress Energy    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Unamortized debt discount (premium), net 1,000 1,000
Duke Energy Carolinas | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 18,345 17,490
Duke Energy Carolinas | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 16,916 15,975
Progress Energy | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 26,880 24,496
Progress Energy | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 24,999 22,548
Duke Energy Progress | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 14,215 12,504
Duke Energy Progress | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 12,757 11,009
Duke Energy Florida | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 11,020 10,348
Duke Energy Florida | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 10,449 9,752
Duke Energy Ohio | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,364 4,165
Duke Energy Ohio | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,095 3,871
Duke Energy Indiana | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 5,095 4,798
Duke Energy Indiana | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,655 4,329
Piedmont | Book Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,004 4,003
Piedmont | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt $ 3,670 $ 3,584