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Employee Benefit Plans (Projected Benefit Obligations Reconciliation of Funded Status to Net Amount Recognized) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Plan      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date $ 5,980 $ 6,299  
Service cost 100 107  
Interest cost 329 325  
Actuarial loss (gain) 86 (106)  
Benefits paid (624) (645)  
Obligation at measurement date 5,871 5,980 $ 6,299
Accumulated Benefit Obligation at measurement date 5,839 5,948  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 6,887 7,162  
Employer contributions 100 100 100
Actual return on plan assets 847 270  
Benefits paid (624) (645)  
Plan assets at measurement date 7,210 6,887 7,162
Funded status of plan 1,339 907  
Pension Plan | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Benefits paid (29)    
Obligation at measurement date 187    
Accumulated Benefit Obligation at measurement date 187    
Change in Fair Value of Plan Assets [Rollforward]      
Employer contributions 29    
Pension Plan | Duke Energy Carolinas      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 1,444 1,514  
Service cost 34 36  
Interest cost 79 78 84
Actuarial loss (gain) 32 (13)  
Benefits paid (181) (177)  
Transfers   (6)  
Obligation at measurement date 1,408 1,444 1,514
Accumulated Benefit Obligation at measurement date 1,408 1,444  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 1,781 1,853  
Employer contributions 27 26 26
Actual return on plan assets 214 73  
Benefits paid (181) (177)  
Transfers   6  
Plan assets at measurement date 1,841 1,781 1,853
Funded status of plan 433 337  
Pension Plan | Duke Energy Carolinas | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Benefits paid (1)    
Obligation at measurement date 7    
Accumulated Benefit Obligation at measurement date 7    
Change in Fair Value of Plan Assets [Rollforward]      
Employer contributions 1    
Pension Plan | Progress Energy      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 1,875 1,990  
Service cost 28 30  
Interest cost 103 103 107
Actuarial loss (gain) 39 (50)  
Benefits paid (186) (198)  
Obligation at measurement date 1,859 1,875 1,990
Accumulated Benefit Obligation at measurement date 1,846 1,861  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 2,376 2,453  
Employer contributions 23 23 22
Actual return on plan assets 323 98  
Benefits paid (186) (198)  
Plan assets at measurement date 2,536 2,376 2,453
Funded status of plan 677 501  
Pension Plan | Progress Energy | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Benefits paid (7)    
Obligation at measurement date 69    
Accumulated Benefit Obligation at measurement date 69    
Change in Fair Value of Plan Assets [Rollforward]      
Employer contributions 7    
Pension Plan | Duke Energy Progress      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 838 911  
Service cost 17 18  
Interest cost 46 47 49
Actuarial loss (gain) 16 (27)  
Benefits paid (103) (111)  
Obligation at measurement date 814 838 911
Accumulated Benefit Obligation at measurement date 813 838  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 1,069 1,120  
Employer contributions 14 14 13
Actual return on plan assets 145 46  
Benefits paid (103) (111)  
Plan assets at measurement date 1,125 1,069 1,120
Funded status of plan 311 231  
Pension Plan | Duke Energy Progress | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Benefits paid (2)    
Obligation at measurement date 22    
Accumulated Benefit Obligation at measurement date 22    
Change in Fair Value of Plan Assets [Rollforward]      
Employer contributions 2    
Pension Plan | Duke Energy Florida      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 1,027 1,069  
Service cost 11 12  
Interest cost 57 56 57
Actuarial loss (gain) 23 (22)  
Benefits paid (81) (88)  
Obligation at measurement date 1,037 1,027 1,069
Accumulated Benefit Obligation at measurement date 1,023 1,013  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 1,290 1,316  
Employer contributions 10 9 9
Actual return on plan assets 176 53  
Benefits paid (81) (88)  
Plan assets at measurement date 1,395 1,290 1,316
Funded status of plan 358 263  
Pension Plan | Duke Energy Florida | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Benefits paid (3)    
Obligation at measurement date 25    
Accumulated Benefit Obligation at measurement date 25    
Change in Fair Value of Plan Assets [Rollforward]      
Employer contributions 3    
Pension Plan | Duke Energy Ohio      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 309 325  
Service cost 2 3  
Interest cost 17 17 18
Actuarial loss (gain) 2 (3)  
Benefits paid (26) (33)  
Transfers (1)    
Obligation at measurement date 305 309 325
Accumulated Benefit Obligation at measurement date 300 304  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 309 326  
Employer contributions 6 5 5
Actual return on plan assets 31 11  
Benefits paid (26) (33)  
Transfers 1    
Plan assets at measurement date 321 309 326
Funded status of plan 16    
Pension Plan | Duke Energy Ohio | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at measurement date 2    
Accumulated Benefit Obligation at measurement date 2    
Pension Plan | Duke Energy Indiana      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 471 496  
Service cost 5 6  
Interest cost 26 26 27
Actuarial loss (gain) 8 (16)  
Benefits paid (50) (41)  
Transfers (14)    
Obligation at measurement date 474 471 496
Accumulated Benefit Obligation at measurement date 469 466  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 498 514  
Employer contributions 8 8 8
Actual return on plan assets 52 17  
Benefits paid (50) (41)  
Transfers 14    
Plan assets at measurement date 522 498 514
Funded status of plan 48 27  
Pension Plan | Duke Energy Indiana | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at measurement date 1    
Accumulated Benefit Obligation at measurement date 1    
Pension Plan | Piedmont      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 181 175  
Service cost 3 4  
Interest cost 10 9 9
Actuarial loss (gain) (2) 5  
Benefits paid (16) (12)  
Obligation at measurement date 176 181 175
Accumulated Benefit Obligation at measurement date 176 181  
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 214 213  
Employer contributions 3 3 3
Actual return on plan assets 28 10  
Benefits paid (16) (12)  
Plan assets at measurement date 229 214 213
Funded status of plan 53 33  
Pension Plan | Piedmont | Nonqualified Plan      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at measurement date 2    
Accumulated Benefit Obligation at measurement date 2    
Other Post-Retirement Benefit Plans      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 334 347  
Service cost 2 2 2
Interest cost 18 17 22
Plan participants' contributions 1 3  
Actuarial loss (gain) 1 2  
Benefits paid (35) (37)  
Obligation at measurement date 321 334 347
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 161 156  
Employer contributions 26    
Actual return on plan assets 18 7  
Benefits paid (35) (37)  
Tax refund   5  
Plan participants' contributions 1 3  
Employer contributions   27  
Plan assets at measurement date 171 161 156
Funded status of plan (150) (173)  
Other Post-Retirement Benefit Plans | Duke Energy Carolinas      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 63 69  
Service cost     1
Interest cost 3 3 5
Plan participants' contributions   1  
Actuarial loss (gain) (1) (2)  
Benefits paid (8) (8)  
Obligation at measurement date 57 63 69
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 107 102  
Employer contributions 3    
Actual return on plan assets 10 4  
Benefits paid (8) (8)  
Tax refund   4  
Plan participants' contributions   1  
Employer contributions   4  
Plan assets at measurement date 112 107 102
Funded status of plan 55 44  
Other Post-Retirement Benefit Plans | Progress Energy      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 146 146  
Interest cost 8 7 9
Plan participants' contributions   1  
Actuarial loss (gain) 2 7  
Benefits paid (14) (15)  
Obligation at measurement date 142 146 146
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date (1) (1)  
Employer contributions 13    
Benefits paid (14) (15)  
Tax refund   0  
Plan participants' contributions   1  
Employer contributions   14  
Plan assets at measurement date (2) (1) (1)
Funded status of plan (144) (147)  
Other Post-Retirement Benefit Plans | Duke Energy Progress      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 87 84  
Interest cost 5 4 5
Actuarial loss (gain) 2 5  
Benefits paid (8) (6)  
Obligation at measurement date 86 87 84
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date   (1)  
Employer contributions 8    
Benefits paid (8) (6)  
Tax refund   0  
Employer contributions   7  
Plan assets at measurement date     (1)
Funded status of plan (86) (87)  
Other Post-Retirement Benefit Plans | Duke Energy Florida      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 60 60  
Interest cost 3 3 4
Actuarial loss (gain) 1 3  
Benefits paid (6) (6)  
Obligation at measurement date 58 60 60
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date   (1)  
Employer contributions 6    
Benefits paid (6) (6)  
Tax refund   0  
Employer contributions   7  
Plan assets at measurement date     (1)
Funded status of plan (58) (60)  
Other Post-Retirement Benefit Plans | Duke Energy Ohio      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 18 19  
Interest cost 1 1 1
Benefits paid (2) (2)  
Obligation at measurement date 17 18 19
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 7 7  
Employer contributions 2    
Actual return on plan assets 1    
Benefits paid (2) (2)  
Tax refund   0  
Employer contributions   2  
Plan assets at measurement date 8 7 7
Funded status of plan (9) (11)  
Other Post-Retirement Benefit Plans | Duke Energy Indiana      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 20 24  
Interest cost 1 1 1
Actuarial loss (gain) 1 (2)  
Benefits paid (3) (3)  
Obligation at measurement date 19 20 24
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date   3  
Employer contributions 3    
Benefits paid (3) (3)  
Tax refund   0  
Plan assets at measurement date     3
Funded status of plan (19) (20)  
Other Post-Retirement Benefit Plans | Piedmont      
Change in Projected Benefit Obligation [Rollforward]      
Obligation at prior measurement date 15 15  
Interest cost 1 1 1
Actuarial loss (gain) 1    
Benefits paid (2) (1)  
Obligation at measurement date 15 15 15
Change in Fair Value of Plan Assets [Rollforward]      
Plan assets at prior measurement date 29 27  
Employer contributions 1    
Actual return on plan assets 4 3  
Benefits paid (2) (1)  
Tax refund   0  
Plan assets at measurement date 32 29 $ 27
Funded status of plan $ 17 $ 14