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EMPLOYEE BENEFIT PLANS | 6 Months Ended
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Jun. 30, 2018
Retirement Benefits [Abstract] |
EMPLOYEE BENEFIT PLANS | EMPLOYEE BENEFIT PLANS Net periodic benefit expense (income) for our pension and postretirement plans include the following components: Domestic Pension Plans
| Three months ended |  | Six months ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Service cost | $ | — |  |  | $ | 0.1 |  |  | $ | — |  |  | $ | 0.2 |
Interest cost | 3.0 |  |  | 3.3 |  |  | 6.1 |  |  | 6.6 |
Expected return on plan assets | (2.6 | ) |  | (2.5 | ) |  | (5.2 | ) |  | (5.0 | )
Net periodic pension benefit expense | $ | 0.4 |  |  | $ | 0.9 |  |  | $ | 0.9 |  |  | $ | 1.8 |
Foreign Pension Plans
| Three months ended |  | Six months ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 1.2 |  |  | 1.2 |  |  | 2.4 |  |  | 2.4 |
Expected return on plan assets | (1.9 | ) |  | (1.6 | ) |  | (3.8 | ) |  | (3.1 | )
Net periodic pension benefit income | $ | (0.7 | ) |  | $ | (0.4 | ) |  | $ | (1.4 | ) |  | $ | (0.7 | )
Postretirement Plans
| Three months ended |  | Six months ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 0.6 |  |  | 0.9 |  |  | 1.1 |  |  | 1.9 |
Amortization of unrecognized prior service credits | (1.0 | ) |  | (0.2 | ) |  | (2.0 | ) |  | (0.4 | )
Net periodic postretirement benefit (income) expense | $ | (0.4 | ) |  | $ | 0.7 |  |  | $ | (0.9 | ) |  | $ | 1.5 |

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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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