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Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Variable Interest Entities [Line Items]    
Regulatory Assets: Current $ 2,300 $ 3,648
Current Assets: Other 447 431
Other Noncurrent Assets: Regulatory assets 13,778 13,618
Other 3,732 3,964
Current Liabilities: Other 2,122 2,319
Current maturities of long-term debt 3,597 2,800
Long-Term Debt 76,524 72,452
Inventory 4,338 4,292
Accounts payable 3,953 4,228
Duke Energy Carolinas    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 927 1,564
Current Assets: Other 48 31
Other Noncurrent Assets: Regulatory assets 3,867 3,916
Other 1,165 1,109
Current Liabilities: Other 589 702
Current maturities of long-term debt 520 19
Long-Term Debt 16,212 15,693
Inventory 1,482 1,484
Accounts payable 1,302 1,183
Duke Energy Progress    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 691 942
Current Assets: Other 62 72
Other Noncurrent Assets: Regulatory assets 4,489 4,546
Other 719 682
Current Liabilities: Other 442 481
Current maturities of long-term debt 983 72
Long-Term Debt 11,190 11,492
Inventory 1,320 1,227
Accounts payable 502 634
Duke Energy Florida    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 261 720
Current Assets: Other 40 51
Other Noncurrent Assets: Regulatory assets 2,071 1,883
Other 497 429
Current Liabilities: Other 330 350
Current maturities of long-term debt 436 589
Long-Term Debt 9,812 9,812
Inventory 686 674
Accounts payable 882 738
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 12 12
Current Assets: Other 6 9
Other Noncurrent Assets: Regulatory assets 188 196
Other 1 1
Current Liabilities: Other 1 10
Current maturities of long-term debt 10 3
Long-Term Debt 198 208
DEPNCSF | Duke Energy Progress | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 39 39
Current Assets: Other 19 31
Other Noncurrent Assets: Regulatory assets 617 643
Other 4 2
Current Liabilities: Other 4 34
Current maturities of long-term debt 34 8
Long-Term Debt 646 680
DEPSCSF | Duke Energy Progress | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 8  
Current Assets: Other 8  
Other Noncurrent Assets: Regulatory assets 157  
Other 1  
Current Liabilities: Other 4  
Current maturities of long-term debt 9  
Long-Term Debt 163  
DEFPF | Duke Energy Florida | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 60 59
Current Assets: Other 18 37
Other Noncurrent Assets: Regulatory assets 754 803
Current Liabilities: Other 2 8
Current maturities of long-term debt 59 59
Long-Term Debt 772 831
DEF ProCo | Duke Energy Florida | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Inventory 477 462
Accounts payable $ 199 $ 188