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v3.25.1

Retirement Plans | 3 Months Ended
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Mar. 31, 2025
Retirement Benefits [Abstract] |
Retirement Plans | (10) Retirement Plans The components of the net periodic benefit cost (credit) for our retirement plans were as follows:
|  | Three Months Ended March 31, |
|  | Defined Benefit Pension Plans |  |  | Retiree Health Care Plan |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Service cost |  | $ | 3.6 |  |  | $ | 4.1 |  |  | $ | - |  |  | $ | - |
Interest cost |  |  | 4.7 |  |  |  | 4.8 |  |  |  | 0.1 |  |  |  | 0.1 |
Expected return on assets |  |  | (4.8 | ) |  |  | (4.7 | ) |  |  | - |  |  |  | - |
Net loss (gain) |  |  | 0.1 |  |  |  | (0.4 | ) |  |  | - |  |  |  | - |
Prior service cost (credit) |  |  | 0.1 |  |  |  | 0.2 |  |  |  | (0.2 | ) |  |  | (0.2 | )
Total benefit cost (credit) |  | $ | 3.7 |  |  | $ | 4.0 |  |  | $ | (0.1 | ) |  | $ | (0.1 | )
During the three months ended March 31, 2025 and 2024, contributions made to our pension plans were $5.5 and $5.2, respectively, and contributions made to our retiree health care plan were $0.3 on both dates. During 2025, we expect to make total contributions of approximately $21.0 to our pension plans and to fund our retiree health care payments as incurred.

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