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Retirement Plans | 9 Months Ended
--- | ---
Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract] |
Retirement Plans | Retirement Plans The components of the net periodic benefit cost for our plans were as follows:
| Defined Benefit Pension Plans
| 3 Months Ended | 9 Months Ended
| September 30, | September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Service cost | $ | 1.8 |  |  | $ | 2.0 |  |  | $ | 5.3 |  |  | $ | 6.1 |
Interest cost | 2.7 |  |  | 3.3 |  |  | 8.1 |  |  | 10.0 |
Expected return on assets | (2.8 | ) |  | (3.3 | ) |  | (8.4 | ) |  | (10.1 | )
Other | 1.1 |  |  | 1.0 |  |  | 3.3 |  |  | 3.0 |
Total benefit cost | $ | 2.8 |  |  | $ | 3.0 |  |  | $ | 8.3 |  |  | $ | 9.0 |
| Retiree Health Care Plan
| 3 Months Ended | 9 Months Ended
| September 30, | September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Interest cost | $ | 0.2 |  |  | $ | 0.2 |  |  | $ | 0.5 |  |  | $ | 0.6 |
Net loss | 0.4 |  |  | 0.1 |  |  | 0.1 |  |  | 0.1 |
Prior service credit | (0.6 | ) |  | — |  |  | (0.6 | ) |  | — |
Total benefit cost | $ | — |  |  | $ | 0.3 |  |  | $ | — |  |  | $ | 0.7 |
During the three and nine months ended September 30, 2015, contributions made to our pension plans were $2.8 and $8.1, respectively, and contributions made to our retiree health care plan were $0.2 and $0.9, respectively. During 2015, we expect to make total contributions of approximately $12.4 to our pension plans and to fund our retiree health care payments as incurred.

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