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Pension and Other Postretirement Benefits | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Retirement Benefits | Pension and Other Post-retirement Benefits We have defined-benefit pension plans and retiree medical plans that provide post-retirement health and life insurance benefits. The components of net periodic pension and retiree medical (income) loss were as follows (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Interest cost | $ | 7.8 |  |  | $ | 7.4 |  |  | $ | 23.2 |  |  | $ | 22.2 |
Expected return on plan assets | (7.4) |  |  | (7.9) |  |  | (21.9) |  |  | (23.7) |
Amortization of net gain | (0.2) |  |  | (0.1) |  |  | (0.6) |  |  | (0.5) |
Net periodic pension and retiree medical (income) loss (1) | $ | 0.2 |  |  | $ | (0.6) |  |  | $ | 0.7 |  |  | $ | (2.0) |
(1)Included in Other, net in our Condensed Consolidated Statements of Operations.

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