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Benefit Plans | 6 Months Ended
--- | ---
Jun. 30, 2021
Benefit Plans [Abstract] |
Benefit Plans | 8. Benefit Plans The Company has several non-contributory defined benefit plans and postretirement benefit plans covering eligible employees and retirees. The following tables present the components of net periodic (benefit) cost for these plans:
|  | Pension Benefits |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  |  |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |
Interest cost |  | $ | 18 |  |  |  | 23 |  |  |  | 36 |  |  |  | 46 |
Expected return on plan assets |  |  | (43 | ) |  |  | (44 | ) |  |  | (86 | ) |  |  | (87 | )
Amortization of unrecognized net loss |  |  | 13 |  |  |  | 12 |  |  |  | 25 |  |  |  | 23 |
Amortization of unrecognized prior service cost |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 1 |
Settlement charge |  |  | 2 |  |  |  | 3 |  |  |  | 2 |  |  |  | 7 |
Net periodic benefit |  | $ | (10 | ) |  | $ | (4 | ) |  | $ | (22 | ) |  | $ | (8 | )
|  | Other Postretirement Benefits |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  | $ | 1 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 1 |
Expected return on plan assets |  |  |  |  |  |  | (1 | ) |  |  | (1 | ) |  |  | (2 | )
Net periodic (benefit) cost |  | $ | 1 |  |  | $ | - |  |  | $ | - |  |  | $ | (1 | )

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