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Pensions and Other Postretirement Benefits | 3 Months Ended
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Mar. 31, 2019
Retirement Benefits [Abstract] |
Pensions and Other Postretirement Benefits | Pensions and Other Postretirement Benefits
| Three Months Ended March 31, 2019 |  | Three Months Ended March 31, 2018
| Pension Benefits |  | Global OPEB Plans |  | Pension Benefits |  | Global OPEB Plans
| U.S. |  | Non-U.S. |  |  | U.S. |  | Non-U.S. |
Service cost | $ | 98 |  |  | $ | 35 |  |  | $ | 4 |  |  | $ | 83 |  |  | $ | 66 |  |  | $ | 5 |
Interest cost | 566 |  |  | 120 |  |  | 54 |  |  | 513 |  |  | 120 |  |  | 50 |
Expected return on plan assets | (868 | ) |  | (195 | ) |  | — |  |  | (973 | ) |  | (212 | ) |  | — |
Amortization of prior service cost (credit) | (1 | ) |  | 1 |  |  | (3 | ) |  | (1 | ) |  | 1 |  |  | (4 | )
Amortization of net actuarial losses | 3 |  |  | 29 |  |  | 8 |  |  | 2 |  |  | 37 |  |  | 13 |
Net periodic pension and OPEB (income) expense | $ | (202 | ) |  | $ | (10 | ) |  | $ | 63 |  |  | $ | (376 | ) |  | $ | 12 |  |  | $ | 64 |
The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $230 million and $421 million in the three months ended March 31, 2019 and 2018 are presented in Interest income and other non-operating income, net.

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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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