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Postretirement Benefits | 3 Months Ended
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Mar. 31, 2018
Defined Benefit Plan [Abstract] |
Pension and Other Postretirement Benefits | Postretirement Benefits The Company has defined contribution plans, qualified and nonqualified defined benefit pension plans and other postretirement benefit plans covering substantially all of its employees. The Company's contributions to its defined contribution plans include matching and annual discretionary contributions which are based on various percentages of compensation, and in some instances are based on the amount of the employees' contributions to the plans. See Note 17 in the Notes to Consolidated Financial Statements in the 2017 Form 10-K for further details regarding these plans. Pension and other postretirement benefit costs included the following components for the three months ended March 31, 2018 and April 1, 2017:
| Pension Benefits |  | Other Postretirement Benefits
(in millions) | March 31, 2018 |  | April 1, 2017 |  | March 31, 2018 |  | April 1, 2017
Interest cost | $ | 5.7 |  |  | $ | 7.1 |  |  | $ | 0.3 |  |  | $ | 0.3 |
Expected return on plan assets | (6.3 | ) |  | (8.4 | ) |  | — |  |  | — |
Amortization of prior service credits | — |  |  | — |  |  | (0.2 | ) |  | (0.2 | )
Amortization of net actuarial losses | 2.5 |  |  | 3.6 |  |  | — |  |  | — |
Net pension and other benefit costs | $ | 1.9 |  |  | $ | 2.3 |  |  | $ | 0.1 |  |  | $ | 0.1 |
Employer Contributions and Benefit Payments. The Company did not make contributions to its qualified pension plans during the three months ended March 31, 2018. During the three months ended April 1, 2017, the Company contributed $35.0 million to its qualified pension plans. Company contributions are subject to change based on funding regulations and Company discretion. During the three months ended March 31, 2018 and April 1, 2017, the Company contributed $1.0 million and $1.2 million, respectively, to fund benefit payments to its nonqualified pension plan.

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- References No definition available. + Details
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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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