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Postretirement benefit plans (Tables) | 6 Months Ended
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Jun. 30, 2021
Retirement Benefits [Abstract] |
Expense Related to Defined Benefit and Retiree Health Care Benefit Plans | Expenses related to defined benefit and retiree health care benefit plans are as follows:
| U.S. Defined Benefit |  | U.S. Retiree Health Care |  | Non-U.S. Defined Benefit
For Three Months Ended June 30, | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | 6 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 9 |  |  | $ | 8 |
Interest cost | 7 |  |  | 8 |  |  | 2 |  |  | 3 |  |  | 10 |  |  | 10 |
Expected return on plan assets | (9) |  |  | (9) |  |  | (3) |  |  | (3) |  |  | (21) |  |  | (20) |
Recognized net actuarial loss | 4 |  |  | 2 |  |  | — |  |  | — |  |  | 2 |  |  | 4 |
Net periodic benefit costs | 8 |  |  | 6 |  |  | — |  |  | — |  |  | — |  |  | 2 |
Settlement losses | 4 |  |  | 3 |  |  | — |  |  | — |  |  | — |  |  | — |
Total, including other postretirement losses | $ | 12 |  |  | $ | 9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2 |
| U.S. Defined Benefit |  | U.S. Retiree Health Care |  | Non-U.S. Defined Benefit
For Six Months Ended June 30, | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | 11 |  |  | $ | 9 |  |  | $ | 2 |  |  | $ | 1 |  |  | $ | 18 |  |  | $ | 16 |
Interest cost | 15 |  |  | 17 |  |  | 5 |  |  | 6 |  |  | 19 |  |  | 19 |
Expected return on plan assets | (17) |  |  | (18) |  |  | (6) |  |  | (6) |  |  | (41) |  |  | (38) |
Recognized net actuarial loss | 8 |  |  | 4 |  |  | — |  |  | — |  |  | 4 |  |  | 7 |
Net periodic benefit costs | 17 |  |  | 12 |  |  | 1 |  |  | 1 |  |  | — |  |  | 4 |
Settlement losses | 8 |  |  | 7 |  |  | — |  |  | — |  |  | 1 |  |  | 1 |
Total, including other postretirement losses | $ | 25 |  |  | $ | 19 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 5 |

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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=118255775&loc=d3e1928-114920 + Details
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