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Employee Benefit and Retirement Plans | 6 Months Ended
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Jun. 30, 2021
Retirement Benefits [Abstract] |
Employee Benefit and Retirement Plans | Employee Benefit and Retirement Plans The components of pension and postretirement benefit (income) expense for the periods indicated, are as follows (in millions):
| Pension Benefits
| Three Months Ended June 30,
| U.S. |  | International
| 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
Interest cost | 5 |  |  | 9 |  |  | 1 |  |  | 3 |
Expected return on plan assets | (13) |  |  | (15) |  |  | (1) |  |  | (1) |
Amortization | 6 |  |  | 6 |  |  | 1 |  |  | — |
Total (income) expense | $ | (2) |  |  | $ | — |  |  | $ | 2 |  |  | $ | 3 |
| Pension Benefits
| Six Months Ended June 30,
| U.S. |  | International
| 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | — |  |  | $ | — |  |  | $ | 2 |  |  | $ | 2 |
Interest cost | 10 |  |  | 18 |  |  | 3 |  |  | 5 |
Expected return on plan assets | (25) |  |  | (30) |  |  | (2) |  |  | (3) |
Amortization | 11 |  |  | 12 |  |  | 2 |  |  | 1 |
Settlements | — |  |  | 1 |  |  | — |  |  | — |
Total (income) expense | $ | (4) |  |  | $ | 1 |  |  | $ | 5 |  |  | $ | 5 |
| Postretirement Benefits
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Interest cost | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |
Amortization | (1) |  |  | (2) |  |  | (2) |  |  | (3) |
Total income | $ | (1) |  |  | $ | (1) |  |  | $ | (2) |  |  | $ | (2) |

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