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Retirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2018
Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans | The following tables provide the components of net periodic benefit cost for its major defined benefit plans and its other postretirement plans.
| Pension Benefits
| Three Months Ended September 30,
| 2018 |  | 2017
| U.S. |  | Non-U.S. |  | U.S. |  | Non-U.S.
Service cost | $ | 156 |  |  | $ | 520 |  |  | $ | 224 |  |  | $ | 520 |
Interest cost | 669 |  |  | 341 |  |  | 687 |  |  | 332 |
Expected return on plan assets | (991 | ) |  | (276 | ) |  | (986 | ) |  | (277 | )
Net amortization | 664 |  |  | 312 |  |  | 641 |  |  | 418 |
Net periodic benefit cost | $ | 498 |  |  | $ | 897 |  |  | $ | 566 |  |  | $ | 993 |
| Pension Benefits
| Nine Months Ended September 30,
| 2018 |  | 2017
| U.S. |  | Non-U.S. |  | U.S. |  | Non-U.S.
Service cost | $ | 665 |  |  | $ | 1,592 |  |  | $ | 732 |  |  | $ | 1,496 |
Interest cost | 1,975 |  |  | 1,053 |  |  | 2,008 |  |  | 957 |
Expected return on plan assets | (2,957 | ) |  | (848 | ) |  | (2,874 | ) |  | (811 | )
Net amortization | 2,034 |  |  | 964 |  |  | 1,924 |  |  | 1,195 |
Net periodic benefit cost | $ | 1,717 |  |  | $ | 2,761 |  |  | $ | 1,790 |  |  | $ | 2,837 |
Other Postretirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Postretirement Plans |
| Other Postretirement Benefits
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Service cost | $ | 167 |  |  | $ | 152 |  |  | $ | 502 |  |  | $ | 456 |
Interest cost | 202 |  |  | 203 |  |  | 608 |  |  | 611 |
Net amortization | (185 | ) |  | (198 | ) |  | (553 | ) |  | (595 | )
Net periodic benefit cost | $ | 184 |  |  | $ | 157 |  |  | $ | 557 |  |  | $ | 472 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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