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Defined Benefit and Postretirement Benefits | 6 Months Ended
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Jun. 30, 2021
Retirement Benefits [Abstract] |
Defined Benefit and Postretirement Benefits | Defined Benefit and Postretirement Benefits For all plans, the components of net periodic benefit for the three months ended June 30, 2021 and 2020 are as follows:
| Pension |  | Postretirement
(in millions) | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | 1.7 |  |  | $ | 1.6 |  |  | $ | 0.1 |  |  | $ | 0.1 |
Interest cost | 5.2 |  |  | 6.6 |  |  | 0.2 |  |  | 0.2 |
Expected return on plan assets | (15.7) |  |  | (14.0) |  |  | — |  |  | — |
Amortization of prior service cost | (0.1) |  |  | (0.1) |  |  | (0.3) |  |  | (0.3) |
Amortization of net loss | 6.5 |  |  | 4.9 |  |  | — |  |  | — |
Net periodic benefit | $ | (2.4) |  |  | $ | (1.0) |  |  | $ | — |  |  | $ | — |
For all plans, the components of net periodic benefit for the six months ended June 30, 2021 and 2020 are as follows:
| Pension |  | Postretirement
(in millions) | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | 3.2 |  |  | $ | 3.2 |  |  | $ | 0.2 |  |  | $ | 0.1 |
Interest cost | 10.4 |  |  | 13.2 |  |  | 0.3 |  |  | 0.4 |
Expected return on plan assets | (29.8) |  |  | (28.7) |  |  | — |  |  | — |
Recognized curtailment gain | (0.7) |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost | (0.1) |  |  | (0.1) |  |  | (0.5) |  |  | (0.5) |
Amortization of net loss | 13.1 |  |  | 9.7 |  |  | — |  |  | — |
Net periodic benefit | $ | (3.9) |  |  | $ | (2.7) |  |  | $ | — |  |  | $ | — |
The components of net periodic benefit, other than the service cost component, are included in “Miscellaneous income, net” in our Condensed Consolidated Statements of Operations. Service cost is recorded within “Cost of sales” and “Selling, general and administrative” in our Condensed Consolidated Statements of Operations. We expect to contribute the following to our pension and postretirement plans:
(in millions) | Pension |  | Postretirement
Expected contributions in 2021 | $ | 20.7 |  |  | $ | 2.6 |
Amounts contributed during the six months ended June 30, 2021 | $ | 16.9 |  |  | $ | 0.3 |

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