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Debt and Credit Facilities (Annual Maturities) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 $ 4,154  
2024 3,216  
2025 4,322  
2026 2,682  
2027 3,203  
Thereafter 52,999  
Total long-term debt, including current maturities 70,576  
Current maturities of long-term debt 4,154 $ 3,387
Unamortized debt discount and premium, net (1,170) (1,250)
Purchase Accounting Adjustments    
Long-term Debt, Fiscal Year Maturity [Abstract]    
Unamortized debt discount and premium, net 1,169  
Duke Energy Carolinas    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 1,018  
2024 19  
2025 491  
2026 621  
2027 323  
Thereafter 11,884  
Total long-term debt, including current maturities 14,356  
Current maturities of long-term debt 1,018 362
Progress Energy    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 697  
2024 939  
2025 1,040  
2026 345  
2027 947  
Thereafter 18,642  
Total long-term debt, including current maturities 22,610  
Current maturities of long-term debt 697 1,082
Duke Energy Progress    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 369  
2024 72  
2025 975  
2026 279  
2027 233  
Thereafter 9,238  
Total long-term debt, including current maturities 11,166  
Current maturities of long-term debt 369 556
Duke Energy Florida    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 328  
2024 867  
2025 65  
2026 66  
2027 714  
Thereafter 7,753  
Total long-term debt, including current maturities 9,793  
Current maturities of long-term debt 328 76
Duke Energy Ohio    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 475  
2025 245  
2026 45  
2027 102  
Thereafter 2,415  
Total long-term debt, including current maturities 3,282  
Current maturities of long-term debt 475  
Duke Energy Indiana    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 303  
2024 4  
2025 4  
2026 4  
2027 177  
Thereafter 3,853  
Total long-term debt, including current maturities 4,345  
Current maturities of long-term debt 303 84
Piedmont    
Long-term Debt, Fiscal Year Maturity [Abstract]    
2023 45  
2024 40  
2025 205  
2026 40  
2027 300  
Thereafter 2,760  
Total long-term debt, including current maturities 3,390  
Current maturities of long-term debt $ 45 $ 0
Duke Energy (Parent) | Debt Maturing April 2023, 2.875% Coupon | Unsecured Debt    
Long-term Debt, Fiscal Year Maturity [Abstract]    
Interest Rate 2.875%  
Current maturities of long-term debt $ 350  
Duke Energy (Parent) | Debt Maturing June 2023, 1.938% Coupon | Unsecured Debt    
Long-term Debt, Fiscal Year Maturity [Abstract]    
Interest Rate 3.469%  
Current maturities of long-term debt $ 500