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Retirement Plans | 6 Months Ended
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Jul. 01, 2017
Compensation and Retirement Disclosure [Abstract] |
Retirement Plans | RETIREMENT PLANS The following is a summary of net pension and Supplemental Executive Retirement Plan (“SERP”) expense recognized by the Company.
(In millions) | 13 Weeks Ended July 1, 2017 |  | 12 Weeks Ended June 18, 2016 |  | 26 Weeks Ended July 1, 2017 |  | 24 Weeks Ended June 18, 2016
Service cost pertaining to benefits earned during the period | $ | 1.8 |  |  | $ | 1.5 |  |  | $ | 3.6 |  |  | $ | 3.0 |
Interest cost on projected benefit obligations | 4.4 |  |  | 4.4 |  |  | 8.8 |  |  | 8.8 |
Expected return on pension assets | (4.9 | ) |  | (4.7 | ) |  | (9.8 | ) |  | (9.3 | )
Net amortization loss | 2.5 |  |  | 1.2 |  |  | 4.9 |  |  | 2.3 |
Net pension expense | $ | 3.8 |  |  | $ | 2.4 |  |  | $ | 7.5 |  |  | $ | 4.8 |

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