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v3.23.1

Pension and Other Retiree Benefits | 3 Months Ended
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Mar. 31, 2023
Retirement Benefits [Abstract] |
Pension and Other Retiree Benefits | 5. Pension and Other Retiree Benefits The components of net periodic benefit (income) cost for pension and post-retirement plans for the three months ended March 31, 2023 and 2022 were as follows:
|  | Three Months Ended March 31, |
|  | Pension |  |  | Post-retirement |
|  | U.S. |  |  | International |  |  |  |  |  |  |
(in millions) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Service cost | $ |  | — |  | $ |  | — |  | $ |  | 0.1 |  | $ |  | 0.3 |  | $ |  | — |  | $ |  | — |
Interest cost |  |  | 2.0 |  |  |  | 1.2 |  |  |  | 4.9 |  |  |  | 2.5 |  |  |  | — |  |  |  | — |
Expected return on plan assets |  |  | (3.0 | ) |  |  | (2.7 | ) |  |  | (5.3 | ) |  |  | (4.6 | ) |  |  | — |  |  |  | — |
Amortization of net loss (gain) |  |  | 0.6 |  |  |  | 0.9 |  |  |  | 1.0 |  |  |  | 1.4 |  |  |  | (0.1 | ) |  |  | (0.1 | )
Amortization of prior service cost |  |  | — |  |  |  | — |  |  |  | 0.1 |  |  |  | — |  |  |  | — |  |  |  | — |
Net periodic benefit (income) cost (1) | $ |  | (0.4 | ) | $ |  | (0.6 | ) | $ |  | 0.8 |  | $ |  | (0.4 | ) | $ |  | (0.1 | ) | $ |  | (0.1 | )
(1) The components of net periodic benefit (income) cost, other than service cost, are included in the line "Non-operating pension expense (income)" in the Consolidated Statements of Loss. We expect to contribute approximately $16.9 million to our defined benefit plans in 2023. For the three months ended March 31, 2023, we have contributed $4.5 million to these plans.

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