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Retirement Plans | 9 Months Ended
--- | ---
Sep. 30, 2022
Retirement Benefits [Abstract] |
Retirement Plans | (11) Retirement Plans The components of the net periodic benefit cost (credit) for our plans were as follows:
|  | Defined Benefit Pension Plan |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Service cost |  | $ | 4.7 |  |  | $ | 5.5 |  |  | $ | 14.7 |  |  | $ | 16.6 |
Interest cost |  |  | 2.1 |  |  |  | 1.5 |  |  |  | 6.6 |  |  |  | 4.6 |
Expected return on assets |  |  | (3.6 | ) |  |  | (3.1 | ) |  |  | (11.1 | ) |  |  | (9.2 | )
Net loss |  |  | 0.5 |  |  |  | — |  |  |  | 1.4 |  |  |  | — |
Prior service cost |  |  | 0.2 |  |  |  | 1.4 |  |  |  | 0.5 |  |  |  | 4.1 |
Total benefit cost |  | $ | 3.9 |  |  | $ | 5.3 |  |  | $ | 12.1 |  |  | $ | 16.1 |
|  | Retiree Health Care Plan |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Interest cost |  |  | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.2 |  |  | $ | 0.2 |
Prior service credit |  |  | (0.2 | ) |  |  | (0.2 | ) |  |  | (0.6 | ) |  |  | (0.6 | )
Net loss |  |  | — |  |  |  | — |  |  |  | 0.1 |  |  |  | 0.1 |
Total benefit credit |  | $ | (0.1 | ) |  | $ | (0.1 | ) |  | $ | (0.3 | ) |  | $ | (0.3 | )
During the three and nine months ended September 30, 2022, contributions made to our pension plans were $1.3 and $5.8, respectively, and contributions made to our retiree health care plan were $0.3 and $0.9, respectively. During 2022, we expect to make total contributions of approximately $16.0 to our pension plans and to fund our retiree health care payments as incurred.

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