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Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2022
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, 2022
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 41 |  |  | $ | 14 |  |  | $ | 11 |  |  | $ | 7 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 2 |
Interest cost on projected benefit obligation | 59 |  |  | 13 |  |  | 18 |  |  | 8 |  |  | 10 |  |  | 3 |  |  | 5 |  |  | 2 |
Expected return on plan assets | (141) |  |  | (38) |  |  | (47) |  |  | (22) |  |  | (24) |  |  | (6) |  |  | (10) |  |  | (6) |
Amortization of actuarial loss | 23 |  |  | 5 |  |  | 7 |  |  | 4 |  |  | 3 |  |  | 1 |  |  | 3 |  |  | 1 |
Amortization of prior service credit | (4) |  |  | (1) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (2) |
Amortization of settlement charges | 2 |  |  | 2 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic pension costs | $ | (20) |  |  | $ | (5) |  |  | $ | (11) |  |  | $ | (2) |  |  | $ | (5) |  |  | $ | (1) |  |  | $ | (1) |  |  | $ | (3) |
| Three Months Ended June 30, 2021
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 44 |  |  | $ | 14 |  |  | $ | 12 |  |  | $ | 8 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 3 |  |  | $ | 2 |
Interest cost on projected benefit obligation | 55 |  |  | 12 |  |  | 18 |  |  | 8 |  |  | 9 |  |  | 4 |  |  | 4 |  |  | 2 |
Expected return on plan assets | (140) |  |  | (35) |  |  | (47) |  |  | (21) |  |  | (25) |  |  | (7) |  |  | (10) |  |  | (5) |
Amortization of actuarial loss | 34 |  |  | 8 |  |  | 9 |  |  | 4 |  |  | 5 |  |  | 1 |  |  | 4 |  |  | 3 |
Amortization of prior service credit | (8) |  |  | (2) |  |  | — |  |  | (1) |  |  | — |  |  | — |  |  | (1) |  |  | (4) |
Amortization of settlement charges | 2 |  |  | 2 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic pension costs | $ | (13) |  |  | $ | (1) |  |  | $ | (8) |  |  | $ | (1) |  |  | $ | (5) |  |  | $ | (1) |  |  | $ | — |  |  | $ | (2) |
| Six Months Ended June 30, 2022
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 81 |  |  | $ | 26 |  |  | $ | 23 |  |  | $ | 14 |  |  | $ | 10 |  |  | $ | 2 |  |  | $ | 4 |  |  | $ | 3 |
Interest cost on projected benefit obligation | 117 |  |  | 27 |  |  | 36 |  |  | 16 |  |  | 20 |  |  | 6 |  |  | 10 |  |  | 4 |
Expected return on plan assets | (281) |  |  | (76) |  |  | (93) |  |  | (44) |  |  | (48) |  |  | (11) |  |  | (19) |  |  | (12) |
Amortization of actuarial loss | 47 |  |  | 10 |  |  | 13 |  |  | 7 |  |  | 6 |  |  | 2 |  |  | 5 |  |  | 3 |
Amortization of prior service credit | (9) |  |  | (2) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | (4) |
Amortization of settlement charges | 4 |  |  | 3 |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic pension costs | $ | (41) |  |  | $ | (12) |  |  | $ | (20) |  |  | $ | (6) |  |  | $ | (12) |  |  | $ | (1) |  |  | $ | (1) |  |  | $ | (6) |
| Six Months Ended June 30, 2021
|  |  | Duke |  |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont
Service cost | $ | 88 |  |  | $ | 28 |  |  | $ | 25 |  |  | $ | 15 |  |  | $ | 11 |  |  | $ | 2 |  |  | $ | 5 |  |  | $ | 3 |
Interest cost on projected benefit obligation | 110 |  |  | 25 |  |  | 35 |  |  | 15 |  |  | 19 |  |  | 7 |  |  | 9 |  |  | 4 |
Expected return on plan assets | (279) |  |  | (70) |  |  | (94) |  |  | (42) |  |  | (51) |  |  | (14) |  |  | (20) |  |  | (10) |
Amortization of actuarial loss | 67 |  |  | 15 |  |  | 19 |  |  | 9 |  |  | 10 |  |  | 3 |  |  | 7 |  |  | 5 |
Amortization of prior service credit | (15) |  |  | (4) |  |  | (1) |  |  | (1) |  |  | — |  |  | — |  |  | (1) |  |  | (5) |
Amortization of settlement charges | 4 |  |  | 3 |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic pension costs | $ | (25) |  |  | $ | (3) |  |  | $ | (15) |  |  | $ | (3) |  |  | $ | (11) |  |  | $ | (2) |  |  | $ | — |  |  | $ | (3) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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