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Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Variable Interest Entities [Line Items]    
Regulatory Assets: Current $ 2,538 $ 2,756
Current Assets: Other 780 695
Other Noncurrent Assets: Regulatory assets 14,200 14,254
Other 3,502 3,509
Current Liabilities: Other 1,861 2,084
Current maturities of long-term debt 4,180 4,349
Long-Term Debt 79,700 76,340
Inventory 4,418 4,509
Accounts payable 4,442 5,479
Duke Energy Carolinas    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 613 685
Current Assets: Other 169 52
Other Noncurrent Assets: Regulatory assets 4,149 4,199
Other 1,141 1,127
Current Liabilities: Other 485 541
Current maturities of long-term debt 23 521
Long-Term Debt 17,911 16,669
Inventory 1,488 1,536
Accounts payable 1,378 1,809
Duke Energy Progress    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 616 626
Current Assets: Other 151 104
Other Noncurrent Assets: Regulatory assets 4,573 4,555
Other 752 724
Current Liabilities: Other 359 427
Current maturities of long-term debt 581 983
Long-Term Debt 13,489 11,371
Inventory 1,333 1,341
Accounts payable 603 749
Duke Energy Florida    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 921 1,022
Current Assets: Other 56 227
Other Noncurrent Assets: Regulatory assets 2,068 2,064
Other 479 465
Current Liabilities: Other 336 342
Current maturities of long-term debt 1,235 534
Long-Term Debt 9,783 9,814
Inventory 773 745
Accounts payable 1,087 1,418
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 186 189
Other 1 1
Current Liabilities: Other 1 2
Current maturities of long-term debt 10 10
Long-Term Debt 193 198
DEPNCSF | Duke Energy Progress | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 39 39
Current Assets: Other 17 27
Other Noncurrent Assets: Regulatory assets 608 620
Other 4 4
Current Liabilities: Other   10
Current maturities of long-term debt 35 34
Long-Term Debt 629 646
DEPSCSF | Duke Energy Progress | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 8 8
Current Assets: Other 6 13
Other Noncurrent Assets: Regulatory assets 151 155
Other 1 1
Current Liabilities: Other   7
Current maturities of long-term debt 5 9
Long-Term Debt 160 163
DEFPF | Duke Energy Florida | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Regulatory Assets: Current 61 61
Current Assets: Other 10 35
Other Noncurrent Assets: Regulatory assets 729 741
Other 7  
Current Liabilities: Other 2 8
Current maturities of long-term debt 60 59
Long-Term Debt 741 773
DEF ProCo | Duke Energy Florida | VIE primary beneficiary    
Variable Interest Entities [Line Items]    
Inventory 509 494
Accounts payable $ 201 $ 208