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Pensions and Other Postretirement Benefits | 9 Months Ended
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Sep. 30, 2019
Retirement Benefits [Abstract] |
Pensions and Other Postretirement Benefits | Pensions and Other Postretirement Benefits
| Three Months Ended September 30, 2019 |  | Three Months Ended September 30, 2018
| Pension Benefits |  | Global OPEB Plans |  | Pension Benefits |  | Global OPEB Plans
| U.S. |  | Non-U.S. |  |  | U.S. |  | Non-U.S. |
Service cost | $ | 99 |  |  | $ | 38 |  |  | $ | 4 |  |  | $ | 83 |  |  | $ | 33 |  |  | $ | 5 |
Interest cost | 566 |  |  | 148 |  |  | 54 |  |  | 513 |  |  | 112 |  |  | 49 |
Expected return on plan assets | (871 | ) |  | (240 | ) |  | — |  |  | (972 | ) |  | (201 | ) |  | — |
Amortization of prior service cost (credit) | (1 | ) |  | 2 |  |  | (3 | ) |  | (1 | ) |  | 1 |  |  | (4 | )
Amortization of net actuarial losses | 2 |  |  | 31 |  |  | 7 |  |  | 2 |  |  | 35 |  |  | 14 |
Curtailments, settlements and other | — |  |  | 119 |  |  | — |  |  | — |  |  | 18 |  |  | — |
Net periodic pension and OPEB (income) expense | $ | (205 | ) |  | $ | 98 |  |  | $ | 62 |  |  | $ | (375 | ) |  | $ | (2 | ) |  | $ | 64 |
| Nine Months Ended September 30, 2019 |  | Nine Months Ended September 30, 2018
| Pension Benefits |  | Global OPEB Plans |  | Pension Benefits |  | Global OPEB Plans
| U.S. |  | Non-U.S. |  |  | U.S. |  | Non-U.S. |
Service cost | $ | 295 |  |  | $ | 102 |  |  | $ | 12 |  |  | $ | 248 |  |  | $ | 138 |  |  | $ | 15 |
Interest cost | 1,698 |  |  | 386 |  |  | 163 |  |  | 1,538 |  |  | 349 |  |  | 147 |
Expected return on plan assets | (2,610 | ) |  | (627 | ) |  | — |  |  | (2,917 | ) |  | (621 | ) |  | — |
Amortization of prior service cost (credit) | (3 | ) |  | 4 |  |  | (10 | ) |  | (3 | ) |  | 3 |  |  | (11 | )
Amortization of net actuarial losses | 8 |  |  | 90 |  |  | 22 |  |  | 7 |  |  | 109 |  |  | 40 |
Curtailments, settlements and other | — |  |  | 119 |  |  | — |  |  | — |  |  | 18 |  |  | — |
Net periodic pension and OPEB (income) expense | $ | (612 | ) |  | $ | 74 |  |  | $ | 187 |  |  | $ | (1,127 | ) |  | $ | (4 | ) |  | $ | 191 |
The curtailment and other charges recorded were primarily due to remeasurement of the General Motors Canada Company hourly pension plan as a result of transformation activities in the three and nine months ended September 30, 2019. Refer to Note 15 for additional information on transformation-related charges. The non-service cost components of net periodic pension and other postretirement benefits (OPEB) income of $125 million and $401 million in the three months ended September 30, 2019 and 2018 and $587 million and $1.2 billion in the nine months ended September 30, 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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