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Income Taxes (Effective Tax Rates) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 1,200 $ 1,090 $ 1,001
Tax credits      
Production tax credits   (46)  
Amortization of ITCs (25)    
Other (23) (43) (63)
AFUDC equity income (68) (48) (41)
AFUDC equity depreciation 46 38 37
Amortization of EDIT (466) (436) (388)
Other (27)    
Changes in valuation allowances 7    
Foreign tax effects (6)    
Unrecognized tax benefits (1)    
Domestic state and local income taxes, net of federal effect 106 88 43
Interest on company-owned life insurance     (114)
Other items, net   (53) (37)
Income tax expense from continuing operations $ 642 $ 590 $ 438
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs (0.40%)    
Other (0.40%)    
AFUDC equity income (1.20%)    
AFUDC equity depreciation 0.80%    
Amortization of EDIT (8.20%)    
Other (0.50%)    
Changes in valuation allowances 0.10%    
Foreign tax effects (0.10%)    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 1.80%    
Total 11.20% 11.40% 9.20%
PTCs (solar)      
Tax credits      
Production tax credits $ (65)    
Tax credits      
Production tax credits (1.10%)    
Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits $ (36)    
Tax credits      
Production tax credits (0.60%)    
Duke Energy Carolinas      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 483 $ 443 $ 338
Tax credits      
Amortization of ITCs (17)    
Other (11) (23) (11)
AFUDC equity income (30) (24) (19)
AFUDC equity depreciation 19 19 18
Amortization of EDIT (260) (225) (197)
Other (1)    
Domestic state and local income taxes, net of federal effect 47 40 12
Other items, net   (4)  
Income tax expense from continuing operations $ 194 $ 226 $ 141
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs (0.70%)    
Other (0.50%)    
AFUDC equity income (1.30%)    
AFUDC equity depreciation 0.80%    
Amortization of EDIT (11.30%)    
Other 0.00%    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 2.00%    
Total 8.40% 10.70% 8.80%
Duke Energy Carolinas | PTCs (solar)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Carolinas | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits $ (36)    
Tax credits      
Production tax credits (1.60%)    
Progress Energy      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 609 $ 545 $ 490
Tax credits      
Production tax credits   (46)  
Amortization of ITCs (5)    
Other (9) (16) (46)
AFUDC equity income (25) (16) (14)
AFUDC equity depreciation 19 14 13
Amortization of EDIT (118) (121) (114)
Other 1    
Unrecognized tax benefits (1)    
Domestic state and local income taxes, net of federal effect 79 73 60
Other items, net   (7) (12)
Income tax expense from continuing operations $ 485 $ 426 $ 377
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs (0.20%)    
Other (0.30%)    
AFUDC equity income (0.90%)    
AFUDC equity depreciation 0.70%    
Amortization of EDIT (4.10%)    
Other 0.00%    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 2.70%    
Total 16.70% 16.40% 16.20%
Progress Energy | PTCs (solar)      
Tax credits      
Production tax credits $ (65)    
Tax credits      
Production tax credits (2.20%)    
Progress Energy | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Progress      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 316 $ 284 $ 241
Tax credits      
Amortization of ITCs (4)    
Other (6) (12) (7)
AFUDC equity income (21) (13) (11)
AFUDC equity depreciation 11 7 6
Amortization of EDIT (96) (98) (91)
Other 2    
Unrecognized tax benefits (1)    
Domestic state and local income taxes, net of federal effect 23 27 18
Other items, net   (6) (7)
Income tax expense from continuing operations $ 223 $ 189 $ 149
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs (0.30%)    
Other (0.40%)    
AFUDC equity income (1.40%)    
AFUDC equity depreciation 0.70%    
Amortization of EDIT (6.40%)    
Other 0.10%    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 1.50%    
Total 14.80% 14.00% 13.00%
Duke Energy Progress | PTCs (solar)      
Tax credits      
Production tax credits $ (1)    
Tax credits      
Production tax credits 0.00%    
Duke Energy Progress | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Florida      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 311 $ 279 $ 268
Tax credits      
Production tax credits   (46)  
Amortization of ITCs (1)    
Other (3) (4) (39)
AFUDC equity income (4) (3) (3)
AFUDC equity depreciation 8 7 7
Amortization of EDIT (22) (23) (23)
Other (3)    
Unrecognized tax benefits 1    
Domestic state and local income taxes, net of federal effect 66 58 56
Other items, net     (5)
Income tax expense from continuing operations $ 289 $ 268 $ 261
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs (0.10%)    
Other (0.20%)    
AFUDC equity income (0.30%)    
AFUDC equity depreciation 0.50%    
Amortization of EDIT (1.50%)    
Other (0.20%)    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.10%    
Domestic state and local income taxes, net of federal effect 4.50%    
Total 19.50% 20.20% 20.40%
Duke Energy Florida | PTCs (solar)      
Tax credits      
Production tax credits $ (64)    
Tax credits      
Production tax credits (4.30%)    
Duke Energy Florida | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Ohio      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 85 $ 85 $ 83
Tax credits      
Other (1) (1) (2)
AFUDC equity income (3) (1) (2)
AFUDC equity depreciation 4 2 2
Amortization of EDIT (22) (23) (22)
Domestic state and local income taxes, net of federal effect 4 3 (2)
Other items, net   (1) 6
Income tax expense from continuing operations $ 68 $ 64 $ 63
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs 0.00%    
Other (0.20%)    
AFUDC equity income (0.70%)    
AFUDC equity depreciation 1.00%    
Amortization of EDIT (5.40%)    
Other 0.00%    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 1.00%    
Total 16.70% 15.80% 15.90%
Duke Energy Ohio | PTCs (solar)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Ohio | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Indiana      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 127 $ 108 $ 128
Tax credits      
Amortization of ITCs (3)    
Other (1) (2) (2)
AFUDC equity income (6) (3) (2)
AFUDC equity depreciation 4 4 4
Amortization of EDIT (57) (49) (33)
Domestic state and local income taxes, net of federal effect 19 16 18
Other items, net   (3) (3)
Income tax expense from continuing operations $ 82 $ 71 $ 110
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs (0.50%)    
Other (0.20%)    
AFUDC equity income (1.00%)    
AFUDC equity depreciation 0.70%    
Amortization of EDIT (9.50%)    
Other (0.10%)    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 3.20%    
Total 13.60% 13.90% 18.10%
Duke Energy Indiana | PTCs (solar)      
Tax credits      
Production tax credits 0.00%    
Duke Energy Indiana | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits 0.00%    
Piedmont      
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]      
U.S. Federal statutory income tax $ 116 $ 107 $ 97
Tax credits      
Other (1) (2) (1)
AFUDC equity income (4) (4) (4)
AFUDC equity depreciation 1    
Amortization of EDIT (8) (18) (20)
Domestic state and local income taxes, net of federal effect 9 12 12
Income tax expense from continuing operations $ 112 $ 95 $ 84
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. Federal statutory income tax 21.00%    
Tax credits      
Amortization of ITCs 0.00%    
Other (0.20%)    
AFUDC equity income (0.70%)    
AFUDC equity depreciation 0.20%    
Amortization of EDIT (1.40%)    
Other (0.20%)    
Changes in valuation allowances 0.00%    
Foreign tax effects 0.00%    
Unrecognized tax benefits 0.00%    
Domestic state and local income taxes, net of federal effect 1.60%    
Total 20.30% 18.70% 18.10%
Piedmont | PTCs (solar)      
Tax credits      
Production tax credits 0.00%    
Piedmont | Amortization of PTCs (nuclear)      
Tax credits      
Production tax credits 0.00%