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Income Taxes (Deferred Income Taxes) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities $ 254 $ 284
Lease obligations 452 430
Pension, post-retirement and other employee benefits 20 89
Progress Energy merger purchase accounting adjustments 210 227
Tax credits and NOL carryforwards 3,259 3,845
Other 36 35
Valuation allowance (130) (517)
Total deferred income tax assets 4,101 4,393
Deferred Tax Liabilities, Gross [Abstract]    
Investments and other assets (2,452) (2,114)
Accelerated depreciation rates (12,629) (11,942)
Regulatory assets and deferred debits, net (1,397) (1,761)
Total deferred income tax liabilities (16,478) (15,817)
Net deferred income tax liabilities (12,377) (11,424)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 3,259 3,845
Valuation allowance 130 517
Net operating loss carry forward 523 214
General Business Credits    
Deferred Tax Assets, Gross [Abstract]    
Tax credits and NOL carryforwards 1,908  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 1,908  
Foreign Tax Credit    
Deferred Tax Assets, Gross [Abstract]    
Valuation allowance (36)  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Valuation allowance 36  
Foreign Tax Credit | Federal    
Deferred Tax Assets, Gross [Abstract]    
Tax credits and NOL carryforwards 36  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 36  
State Carryforward And Credits | State    
Deferred Tax Assets, Gross [Abstract]    
Tax credits and NOL carryforwards 265  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 265  
Corporate AMT Credit Cards    
Deferred Tax Assets, Gross [Abstract]    
Tax credits and NOL carryforwards 1,038  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 1,038  
NOL Carryforwards | State    
Deferred Tax Assets, Gross [Abstract]    
Valuation allowance (83)  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Valuation allowance 83  
NOL Carryforwards | Foreign    
Deferred Tax Assets, Gross [Abstract]    
Tax credits and NOL carryforwards 12  
Valuation allowance (12)  
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 12  
Valuation allowance 12  
Duke Energy Carolinas    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 217 217
Lease obligations 86 88
Pension, post-retirement and other employee benefits   (33)
Tax credits and NOL carryforwards 595 522
Other 2 11
Valuation allowance (1)  
Total deferred income tax assets 899 805
Deferred Tax Liabilities, Gross [Abstract]    
Investments and other assets (1,545) (1,350)
Pension post-retirement and other employee benefits (43)  
Accelerated depreciation rates (3,219) (3,203)
Regulatory assets and deferred debits, net (283) (304)
Total deferred income tax liabilities (5,090) (4,857)
Net deferred income tax liabilities (4,191) (4,052)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 595 522
Valuation allowance 1  
Net operating loss carry forward 47 2
Progress Energy    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 82 84
Lease obligations 263 265
Pension, post-retirement and other employee benefits   (23)
Tax credits and NOL carryforwards 844 783
Other 4 5
Total deferred income tax assets 1,193 1,114
Deferred Tax Liabilities, Gross [Abstract]    
Investments and other assets (829) (724)
Pension post-retirement and other employee benefits (57)  
Accelerated depreciation rates (5,171) (4,608)
Regulatory assets and deferred debits, net (712) (1,045)
Total deferred income tax liabilities (6,769) (6,377)
Net deferred income tax liabilities (5,576) (5,263)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 844 783
Net operating loss carry forward 85 116
Duke Energy Progress    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 49 43
Lease obligations 184 179
Pension, post-retirement and other employee benefits   (1)
Tax credits and NOL carryforwards 383 312
Other 3 3
Total deferred income tax assets 619 536
Deferred Tax Liabilities, Gross [Abstract]    
Investments and other assets (790) (671)
Pension post-retirement and other employee benefits (13)  
Accelerated depreciation rates (1,914) (1,624)
Regulatory assets and deferred debits, net (544) (585)
Total deferred income tax liabilities (3,261) (2,880)
Net deferred income tax liabilities (2,642) (2,344)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 383 312
Net operating loss carry forward 66 59
Duke Energy Florida    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 33 41
Lease obligations 79 86
Pension, post-retirement and other employee benefits   (26)
Tax credits and NOL carryforwards 452 449
Other 1 2
Total deferred income tax assets 565 552
Deferred Tax Liabilities, Gross [Abstract]    
Investments and other assets (54) (69)
Pension post-retirement and other employee benefits (48)  
Accelerated depreciation rates (3,301) (3,047)
Regulatory assets and deferred debits, net (167) (460)
Total deferred income tax liabilities (3,570) (3,576)
Net deferred income tax liabilities (3,005) (3,024)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 452 449
Net operating loss carry forward 30 5
Duke Energy Ohio    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 23 17
Lease obligations 1 2
Pension, post-retirement and other employee benefits 3 6
Tax credits and NOL carryforwards 84 70
Regulatory liabilities and deferred credits 2  
Other 4 4
Total deferred income tax assets 117 99
Deferred Tax Liabilities, Gross [Abstract]    
Accelerated depreciation rates (1,414) (1,361)
Regulatory assets and deferred debits, net (44) (52)
Total deferred income tax liabilities (1,458) (1,413)
Net deferred income tax liabilities (1,341) (1,314)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 84 70
Net operating loss carry forward 26 22
Duke Energy Indiana    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 15 15
Lease obligations 11 12
Pension, post-retirement and other employee benefits   1
Tax credits and NOL carryforwards 191 145
Regulatory liabilities and deferred credits 19 10
Other (1)  
Total deferred income tax assets 235 183
Deferred Tax Liabilities, Gross [Abstract]    
Pension post-retirement and other employee benefits (3)  
Accelerated depreciation rates (1,701) (1,677)
Regulatory assets and deferred debits, net (56)  
Total deferred income tax liabilities (1,760) (1,677)
Net deferred income tax liabilities (1,525) (1,494)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 191 145
Net operating loss carry forward 8 54
Piedmont    
Deferred Tax Assets, Gross [Abstract]    
Deferred credits and other liabilities 21 40
Lease obligations 1 2
Pension, post-retirement and other employee benefits   (2)
Tax credits and NOL carryforwards 58 57
Other 7 8
Total deferred income tax assets 87 105
Deferred Tax Liabilities, Gross [Abstract]    
Investments and other assets (68) (48)
Pension post-retirement and other employee benefits (6)  
Accelerated depreciation rates (1,072) (1,019)
Regulatory assets and deferred debits, net (12) (56)
Total deferred income tax liabilities (1,158) (1,123)
Net deferred income tax liabilities (1,071) (1,018)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]    
Tax credits and NOL carryforwards 58 57
Net operating loss carry forward $ 8 $ 15