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Defined Benefit and Postretirement Benefits | 6 Months Ended
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Jun. 30, 2020
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, 2020 and 2019 are as follows:
| Pension |  | Postretirement
(in millions) | 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 1.6 |  |  | $ | 1.3 |  |  | $ | 0.1 |  |  | $ | — |
Interest cost | 6.6 |  |  | 7.7 |  |  | 0.2 |  |  | 0.1 |
Expected return on plan assets | (14.0 | ) |  | (14.2 | ) |  | — |  |  | — |
Amortization of prior service cost | (0.1 | ) |  | (0.2 | ) |  | — |  |  |  |
Amortization of net loss (gain) | 4.9 |  |  | 3.3 |  |  | (0.3 | ) |  | (0.1 | )
Net periodic benefit | $ | (1.0 | ) |  | $ | (2.1 | ) |  | $ | — |  |  | $ | — |
For all plans, the components of net periodic benefit for the six months ended June 30, 2020 and 2019 are as follows:
| Pension |  | Postretirement
(in millions) | 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 3.2 |  |  | $ | 2.7 |  |  | $ | 0.1 |  |  | $ | — |
Interest cost | 13.2 |  |  | 15.4 |  |  | 0.4 |  |  | 0.2 |
Expected return on plan assets | (28.7 | ) |  | (28.6 | ) |  | — |  |  | — |
Amortization of prior service cost | (0.1 | ) |  | (0.3 | ) |  | — |  |  | — |
Amortization of net loss (gain) | 9.7 |  |  | 6.7 |  |  | (0.5 | ) |  | (0.2 | )
Net periodic benefit | $ | (2.7 | ) |  | $ | (4.1 | ) |  | $ | — |  |  | $ | — |
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. Based on current actuarial calculations, we expected to contribute $21.4 million to our pension plans. As permitted by the Coronavirus Aid, Relief, and Economic Security (CARES) Act, which was signed into law on March 27, 2020, we have chosen to defer pension contributions of $18.2 million until January 1, 2021. We now expect to contribute the following to our pension and postretirement plans:
(in millions) | Pension |  | Postretirement
Expected contributions in 2020 | $ | 3.2 |  |  | $ | 2.5 |
Amounts contributed during the six months ended June 30, 2020 | $ | 1.1 |  |  | $ | 1.2 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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