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v3.25.2

Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2025
Qualified Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Components of Net Periodic Pension Costs | The following tables include the components of net periodic pension costs for qualified pension plans.
| Three Months Ended June 30, 2025
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 27 |  |  | $ | 9 |  |  | $ | 8 |  |  | $ | 4 |  |  | $ | 3 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 1 |
Interest cost on projected benefit obligation | 82 |  |  | 20 |  |  | 26 |  |  | 12 |  |  | 15 |  |  | 4 |  |  | 6 |  |  | 2 |
Expected return on plan assets | (149) |  |  | (38) |  |  | (55) |  |  | (25) |  |  | (30) |  |  | (6) |  |  | (10) |  |  | (5) |
Amortization of actuarial loss | 15 |  |  | 3 |  |  | 4 |  |  | 2 |  |  | 2 |  |  | — |  |  | 1 |  |  | 1 |
Amortization of prior service credit | (3) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (1) |
Amortization of settlement charges | 7 |  |  | 3 |  |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | 1 |  |  | 1 |
Net periodic pension costs | $ | (21) |  |  | $ | (3) |  |  | $ | (15) |  |  | $ | (5) |  |  | $ | (10) |  |  | $ | (1) |  |  | $ | (1) |  |  | $ | (1) |
| Three Months Ended June 30, 2024
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 29 |  |  | $ | 10 |  |  | $ | 8 |  |  | $ | 5 |  |  | $ | 4 |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
Interest cost on projected benefit obligation | 83 |  |  | 20 |  |  | 26 |  |  | 12 |  |  | 14 |  |  | 4 |  |  | 7 |  |  | 3 |
Expected return on plan assets | (154) |  |  | (40) |  |  | (54) |  |  | (25) |  |  | (29) |  |  | (7) |  |  | (11) |  |  | (5) |
Amortization of actuarial loss | 8 |  |  | 2 |  |  | 3 |  |  | 2 |  |  | 1 |  |  | 1 |  |  | 1 |  |  | — |
Amortization of prior service credit | (4) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (2) |
Amortization of settlement charges | 4 |  |  | 2 |  |  | 1 |  |  | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | 1 |
Net periodic pension costs | $ | (34) |  |  | $ | (6) |  |  | $ | (16) |  |  | $ | (5) |  |  | $ | (9) |  |  | $ | (2) |  |  | $ | (2) |  |  | $ | (2) |
| Six Months Ended June 30, 2025
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 54 |  |  | $ | 18 |  |  | $ | 15 |  |  | $ | 9 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 2 |
Interest cost on projected benefit obligation | 164 |  |  | 39 |  |  | 52 |  |  | 23 |  |  | 29 |  |  | 8 |  |  | 13 |  |  | 5 |
Expected return on plan assets | (298) |  |  | (76) |  |  | (110) |  |  | (49) |  |  | (60) |  |  | (11) |  |  | (20) |  |  | (10) |
Amortization of actuarial loss | 30 |  |  | 7 |  |  | 9 |  |  | 4 |  |  | 4 |  |  | 1 |  |  | 2 |  |  | 2 |
Amortization of prior service credit | (6) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (3) |
Amortization of settlement charges | 13 |  |  | 6 |  |  | 4 |  |  | 3 |  |  | 1 |  |  | — |  |  | 1 |  |  | 2 |
Net periodic pension costs | $ | (43) |  |  | $ | (6) |  |  | $ | (30) |  |  | $ | (10) |  |  | $ | (20) |  |  | $ | (1) |  |  | $ | (2) |  |  | $ | (2) |
| Six Months Ended June 30, 2024
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 57 |  |  | $ | 19 |  |  | $ | 16 |  |  | $ | 10 |  |  | $ | 7 |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 2 |
Interest cost on projected benefit obligation | 165 |  |  | 40 |  |  | 52 |  |  | 24 |  |  | 28 |  |  | 8 |  |  | 13 |  |  | 5 |
Expected return on plan assets | (308) |  |  | (81) |  |  | (108) |  |  | (50) |  |  | (58) |  |  | (13) |  |  | (21) |  |  | (10) |
Amortization of actuarial loss | 16 |  |  | 4 |  |  | 5 |  |  | 3 |  |  | 2 |  |  | 1 |  |  | 2 |  |  | 1 |
Amortization of prior service credit | (7) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (4) |
Amortization of settlement charges | 9 |  |  | 4 |  |  | 2 |  |  | 2 |  |  | 1 |  |  | — |  |  | 1 |  |  | 2 |
Net periodic pension costs | $ | (68) |  |  | $ | (14) |  |  | $ | (33) |  |  | $ | (11) |  |  | $ | (20) |  |  | $ | (3) |  |  | $ | (3) |  |  | $ | (4) |

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