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Employee Benefit Plans | 6 Months Ended
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Jun. 30, 2022
Retirement Benefits [Abstract] |
Employee Benefit Plans | Employee Benefit Plans The components of net periodic benefit cost, included in other operating expenses on the Company’s condensed consolidated statements of income, for the three and six months ended June 30, 2022 and 2021 were as follows (dollars in millions):
|  | Pension Benefits |  | Other Benefits
|  | Three months ended June 30, |  | Three months ended June 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Service cost |  | $ | 4 |  |  | $ | 5 |  |  | $ | — |  |  | $ | 1 |
Interest cost |  | 2 |  |  | 1 |  |  | 1 |  |  | 1 |
Expected return on plan assets |  | (3) |  |  | (3) |  |  | — |  |  | — |
Amortization of prior service cost (credit) |  | — |  |  | — |  |  | (1) |  |  | (1) |
Amortization of prior actuarial losses |  | 1 |  |  | 2 |  |  | 1 |  |  | 1 |
Net periodic benefit cost |  | $ | 4 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 2 |
|  | Pension Benefits |  | Other Benefits
|  | Six months ended June 30, |  | Six months ended June 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Service cost |  | $ | 8 |  |  | $ | 9 |  |  | $ | 1 |  |  | $ | 2 |
Interest cost |  | 3 |  |  | 2 |  |  | 1 |  |  | 1 |
Expected return on plan assets |  | (6) |  |  | (5) |  |  | — |  |  | — |
Amortization of prior service cost (credit) |  | — |  |  | — |  |  | (1) |  |  | (1) |
Amortization of prior actuarial losses |  | 2 |  |  | 3 |  |  | 1 |  |  | 1 |
Net periodic benefit cost |  | $ | 7 |  |  | $ | 9 |  |  | $ | 2 |  |  | $ | 3 |

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