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Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension Plan      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 107 $ 110  
Interest cost on projected benefit obligation 325 344  
Amortization of regulatory asset 2 3 $ 3
Pension Plan | Duke Energy Carolinas      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 36 36  
Interest cost on projected benefit obligation 78 84 59
Expected return on plan assets (161) (160) (152)
Amortization of actuarial loss 8 2 16
Amortization of prior service credit (1) (1) (3)
Amortization of settlement charges 12 9 9
Net periodic pension costs (27) (28) (23)
Service cost 37 38 48
Pension Plan | Progress Energy      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 30 30  
Interest cost on projected benefit obligation 103 107 77
Expected return on plan assets (217) (198) (183)
Amortization of actuarial loss 10 4 23
Amortization of settlement charges 10 5 8
MRVA method change     24
Net periodic pension costs (62) (49) (8)
Service cost 32 33 43
Pension Plan | Duke Energy Progress      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 18 18  
Interest cost on projected benefit obligation 47 49 35
Expected return on plan assets (99) (93) (88)
Amortization of actuarial loss 6 2 12
Amortization of settlement charges 9 3 7
Net periodic pension costs (18) (20) (9)
Service cost 19 19 25
Pension Plan | Duke Energy Florida      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 12 12  
Interest cost on projected benefit obligation 56 57 41
Expected return on plan assets (116) (104) (94)
Amortization of actuarial loss 5 2 12
Amortization of settlement charges 2 1 1
MRVA method change     24
Net periodic pension costs (40) (31) 1
Service cost 13 13 17
Pension Plan | Duke Energy Ohio      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 3 3  
Interest cost on projected benefit obligation 17 18 13
Expected return on plan assets (25) (24) (23)
Amortization of actuarial loss 1   4
Amortization of settlement charges 2   5
Net periodic pension costs (2) (3) 3
Amortization of regulatory asset 1 1 1
Service cost 3 3 4
Pension Plan | Duke Energy Indiana      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 6 6  
Interest cost on projected benefit obligation 26 27 20
Expected return on plan assets (42) (40) (37)
Amortization of actuarial loss 4 2 9
Amortization of prior service credit (2) (2) (2)
Amortization of settlement charges 2 1 1
Net periodic pension costs (6) (6)  
Service cost 6 6 9
Pension Plan | Piedmont      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 4 3  
Interest cost on projected benefit obligation 9 9 8
Expected return on plan assets (20) (20) (24)
Amortization of actuarial loss 3   5
Amortization of prior service credit (7) (7) (7)
Amortization of settlement charges 5 4 7
Net periodic pension costs (6) (10) (6)
Service cost 4 4 5
Pension Plan | Parent      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 325 344 249
Expected return on plan assets (613) (588) (558)
Amortization of actuarial loss 36 10 81
Amortization of prior service credit (13) (14) (18)
Amortization of settlement charges 32 19 32
MRVA method change     24
Net periodic pension costs (119) (112) (38)
Service cost 114 117 152
Other Post-Retirement Benefit Plans      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost 2 2 3
Interest cost on projected benefit obligation 17 22 17
Expected return on plan assets (11) (11) (10)
Amortization of actuarial loss (6) (6) 2
Amortization of prior service credit (21) (23) (8)
Net periodic pension costs (19) (16) 4
Amortization of regulatory asset 4 4 4
Other Post-Retirement Benefit Plans | Duke Energy Carolinas      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost   1 1
Interest cost on projected benefit obligation 3 5 4
Expected return on plan assets (8) (7) (6)
Amortization of actuarial loss (2) (3)  
Amortization of prior service credit (4) (5) (3)
Net periodic pension costs (11) (9) (4)
Other Post-Retirement Benefit Plans | Progress Energy      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 7 9 7
Amortization of actuarial loss 8 8 1
Amortization of prior service credit (11) (11) (2)
Net periodic pension costs 4 6 6
Other Post-Retirement Benefit Plans | Duke Energy Progress      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Interest cost on projected benefit obligation 4 5 4
Amortization of actuarial loss 6 5 1
Amortization of prior service credit (6) (6) (1)
Net periodic pension costs 4 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 4 3
Amortization of actuarial loss 2 2 1
Amortization of prior service credit (5) (5) (1)
Net periodic pension costs   1 3
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 (2) (2)  
Net periodic pension costs (1) (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 (4) (3)  
Amortization of prior service credit (5) (5)  
Net periodic pension costs (8) (7) 1
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)
Amortization of prior service credit     (2)
Net periodic pension costs $ (1) $ (1) $ (3)