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Income Taxes (Components of Income Tax Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Current income taxes      
Federal(a) $ (565) $ (365) $ 71
State (6) 31 1
Foreign 2 2 3
Total current income taxes (569) (332) 75
Deferred income taxes      
Federal 1,101 858 319
State 135 81 53
Total deferred income taxes 1,236 939 372
ITC amortization (25) (17) (9)
Income tax expense from continuing operations 642 590 438
Tax benefit from discontinued operations   (50) (359)
Total income tax expense included in Consolidated Statements of Operations   540 79
Deferred income taxes attributable to generation / utilization under tax sharing agreement 354    
Net operating loss carry forward 523 214  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Domestic 5,674 5,145 4,700
Foreign 38 49 67
Income from continuing operations before income taxes 5,712 5,194 4,767
Alternative minimum tax   69  
Duke Energy Carolinas      
Current income taxes      
Federal(a) (278) 178 173
State 30 75 22
Total current income taxes (248) 253 195
Deferred income taxes      
Federal 432 10 (43)
State 27 (25) (7)
Total deferred income taxes 459 (15) (50)
ITC amortization (17) (12) (4)
Income tax expense from continuing operations 194 226 141
Total income tax expense included in Consolidated Statements of Operations   226 141
Deferred income taxes attributable to generation / utilization under tax sharing agreement (36)    
Net operating loss carry forward 47 2  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes 2,302 2,109 1,611
Progress Energy      
Current income taxes      
Federal(a) 134 359 459
State 21 34 38
Total current income taxes 155 393 497
Deferred income taxes      
Federal 259 (22) (154)
State 76 59 38
Total deferred income taxes 335 37 (116)
ITC amortization (5) (4) (4)
Income tax expense from continuing operations 485 426 377
Total income tax expense included in Consolidated Statements of Operations   426 377
Deferred income taxes attributable to generation / utilization under tax sharing agreement (11)    
Net operating loss carry forward 85 116  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes 2,900 2,597 2,333
Duke Energy Progress      
Current income taxes      
Federal(a) (118) 373 198
State (3) 40 4
Total current income taxes (121) 413 202
Deferred income taxes      
Federal 319 (215) (69)
State 29 (6) 19
Total deferred income taxes 348 (221) (50)
ITC amortization (4) (3) (3)
Income tax expense from continuing operations 223 189 149
Total income tax expense included in Consolidated Statements of Operations   189 149
Deferred income taxes attributable to generation / utilization under tax sharing agreement (29)    
Net operating loss carry forward 66 59  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes 1,505 1,353 1,147
Duke Energy Florida      
Current income taxes      
Federal(a) 264 14 279
State 74 (12) 71
Total current income taxes 338 2 350
Deferred income taxes      
Federal (57) 181 (89)
State 9 86  
Total deferred income taxes (48) 267 (89)
ITC amortization (1) (1)  
Income tax expense from continuing operations 289 268 261
Total income tax expense included in Consolidated Statements of Operations   268 261
Deferred income taxes attributable to generation / utilization under tax sharing agreement 4    
Net operating loss carry forward 30 5  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes 1,482 1,329 1,277
Proceeds from sale of PTCs   28  
Duke Energy Ohio      
Current income taxes      
Federal(a) 66 52 (46)
State 2 3 (3)
Total current income taxes 68 55 (49)
Deferred income taxes      
Federal (3) 8 111
State 3 1 1
Total deferred income taxes   9 112
Income tax expense from continuing operations 68 64 63
Total income tax expense included in Consolidated Statements of Operations   64 63
Deferred income taxes attributable to generation / utilization under tax sharing agreement (14)    
Net operating loss carry forward 26 22  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes 406 405 397
Duke Energy Indiana      
Current income taxes      
Federal(a) 125 70 10
State 13 12 9
Total current income taxes 138 82 19
Deferred income taxes      
Federal (64) (19) 77
State 11 8 14
Total deferred income taxes (53) (11) 91
ITC amortization (3)    
Income tax expense from continuing operations 82 71 110
Total income tax expense included in Consolidated Statements of Operations   71 110
Deferred income taxes attributable to generation / utilization under tax sharing agreement (45)    
Net operating loss carry forward 8 54  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes 602 512 607
Piedmont      
Current income taxes      
Federal(a) 65 40 44
State 7 (6) 3
Total current income taxes 72 34 47
Deferred income taxes      
Federal 37 40 25
State 3 21 12
Total deferred income taxes 40 61 37
Income tax expense from continuing operations 112 95 84
Total income tax expense included in Consolidated Statements of Operations   95 84
Deferred income taxes attributable to generation / utilization under tax sharing agreement (2)    
Net operating loss carry forward 8 15  
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract]      
Income from continuing operations before income taxes $ 552 $ 508 $ 463