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Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Plan      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 100 $ 107  
Interest cost on projected benefit obligation 329 325  
Amortization of regulatory asset 2 2 $ 3
Pension Plan | Duke Energy Carolinas      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 34 36  
Interest cost on projected benefit obligation 79 78 84
Expected return on plan assets (153) (161) (160)
Amortization of actuarial loss 15 8 2
Amortization of prior service credit (1) (1) (1)
Amortization of settlement charges 12 12 9
Net periodic pension costs (12) (27) (28)
Service cost 36 37 38
Pension Plan | Progress Energy      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 28 30  
Interest cost on projected benefit obligation 103 103 107
Expected return on plan assets (220) (217) (198)
Amortization of actuarial loss 19 10 4
Amortization of settlement charges 7 10 5
Net periodic pension costs (61) (62) (49)
Service cost 30 32 33
Pension Plan | Duke Energy Progress      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 17 18  
Interest cost on projected benefit obligation 46 47 49
Expected return on plan assets (98) (99) (93)
Amortization of actuarial loss 10 6 2
Amortization of settlement charges 5 9 3
Net periodic pension costs (19) (18) (20)
Service cost 18 19 19
Pension Plan | Duke Energy Florida      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 11 12  
Interest cost on projected benefit obligation 57 56 57
Expected return on plan assets (120) (116) (104)
Amortization of actuarial loss 9 5 2
Amortization of settlement charges 2 2 1
Net periodic pension costs (40) (40) (31)
Service cost 12 13 13
Pension Plan | Duke Energy Ohio      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 2 3  
Interest cost on projected benefit obligation 17 17 18
Expected return on plan assets (24) (25) (24)
Amortization of actuarial loss 2 1  
Amortization of settlement charges   2  
Net periodic pension costs (2) (2) (3)
Amortization of regulatory asset 1 1 1
Service cost 3 3 3
Pension Plan | Duke Energy Indiana      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 5 6  
Interest cost on projected benefit obligation 26 26 27
Expected return on plan assets (40) (42) (40)
Amortization of actuarial loss 5 4 2
Amortization of prior service credit (2) (2) (2)
Amortization of settlement charges 2 2 1
Net periodic pension costs (3) (6) (6)
Service cost 6 6 6
Pension Plan | Piedmont      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 3 4  
Interest cost on projected benefit obligation 10 9 9
Expected return on plan assets (20) (20) (20)
Amortization of actuarial loss 4 3  
Amortization of prior service credit (7) (7) (7)
Amortization of settlement charges 4 5 4
Net periodic pension costs (5) (6) (10)
Service cost 4 4 4
Pension Plan | Parent      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 329 325 344
Expected return on plan assets (597) (613) (588)
Amortization of actuarial loss 61 36 10
Amortization of prior service credit (13) (13) (14)
Amortization of settlement charges 25 32 19
Net periodic pension costs (88) (119) (112)
Service cost 107 114 117
Other Post-Retirement Benefit Plans      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 2 2 2
Interest cost on projected benefit obligation 18 17 22
Expected return on plan assets (12) (11) (11)
Amortization of actuarial loss (3) (6) (6)
Amortization of prior service credit (21) (21) (23)
Net periodic pension costs (16) (19) (16)
Amortization of regulatory asset 3 4 4
Regulatory adjustment of net periodic post-retirement benefit costs 5    
Other Post-Retirement Benefit Plans | Duke Energy Carolinas      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost     1
Interest cost on projected benefit obligation 3 3 5
Expected return on plan assets (8) (8) (7)
Amortization of actuarial loss (1) (2) (3)
Amortization of prior service credit (4) (4) (5)
Net periodic pension costs (10) (11) (9)
Other Post-Retirement Benefit Plans | Progress Energy      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 8 7 9
Amortization of actuarial loss 5 8 8
Amortization of prior service credit (11) (11) (11)
Net periodic pension costs 2 4 6
Other Post-Retirement Benefit Plans | Duke Energy Progress      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 5 4 5
Amortization of actuarial loss 4 6 5
Amortization of prior service credit (6) (6) (6)
Net periodic pension costs 3 4 4
Other Post-Retirement Benefit Plans | Duke Energy Florida      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 3 3 4
Amortization of actuarial loss 2 2 2
Amortization of prior service credit (5) (5) (5)
Net periodic pension costs     1
Other Post-Retirement Benefit Plans | Duke Energy Ohio      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 1 1 1
Amortization of actuarial loss (1) (2) (2)
Net periodic pension costs   (1) (1)
Amortization of regulatory asset 1 1 1
Other Post-Retirement Benefit Plans | Duke Energy Indiana      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 1 1 1
Amortization of actuarial loss (1) (4) (3)
Amortization of prior service credit (5) (5) (5)
Net periodic pension costs (5) (8) (7)
Regulatory adjustment of net periodic post-retirement benefit costs 5    
Other Post-Retirement Benefit Plans | Piedmont      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 1 1 1
Expected return on plan assets (2) (2) (2)
Net periodic pension costs $ (1) $ (1) $ (1)