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Retirement Benefits | 6 Months Ended
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Jun. 30, 2020
Retirement Benefits [Abstract] |
Retirement Benefits | Retirement Benefits The following table presents the components of net periodic pension cost and amounts recognized in other comprehensive income (loss) for our pension plans:
|  | Three Months Ended |  |  |  | Six Months Ended |  |
|  | June 30, |  |  |  | June 30, |  |
(in millions) |  | 2020 |  | 2019 |  | 2020 |  | 2019
Components of net periodic pension cost: |  |  |  |  |  |  |  |
Service cost |  | $ | 0.3 |  |  | $ | 0.4 |  |  | $ | 0.7 |  |  | $ | 0.9 |
Interest cost |  | 0.6 |  |  | 0.5 |  |  | 1.3 |  |  | 1.0 |
Expected return on plan assets |  | (0.9) |  |  | (0.6) |  |  | (2.0) |  |  | (1.3) |
Amortization of net actuarial losses(a) |  | 0.2 |  |  | 0.1 |  |  | 0.5 |  |  | 0.3 |
Net periodic pension cost |  | $ | 0.2 |  |  | $ | 0.4 |  |  | $ | 0.5 |  |  | $ | 0.9 |
(a)Reflects amounts reclassified from accumulated other comprehensive income to net income. In the six months ended June 30, 2020, we contributed $0.7 million to our pension plans. In 2020, we expect to contribute approximately $1.4 million to our pension plans.

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