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Postretirement benefits (Tables) | 6 Months Ended
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Jun. 30, 2024
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs [Table Text Block] | The components of net pension and other postretirement benefit costs (benefits) reflected in Net income in the Consolidated statements of operations were as follows:
| Pension Benefit Plans |  | Other Postretirement Benefit Plans
| 2024 |  | 2023 |  | 2024 |  | 2023
Three Months Ended June 30 | U.S. Plans |  | Non-U.S. Plans |  | U.S. Plans |  | Non-U.S. Plans |  |  |  |
(in millions of U.S. dollars) |  |  |  |
Service cost | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 2 |  |  | $ | — |  |  | $ | — |
Non-service cost (benefit): |  |  |  |  |  |  |  |  |  |  |
Interest cost | 34 |  |  | 9 |  |  | 34 |  |  | 9 |  |  | — |  |  | 1 |
Expected return on plan assets | (61) |  |  | (12) |  |  | (56) |  |  | (13) |  |  | (1) |  |  | (1) |
Amortization of net actuarial (gain) loss | (1) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Settlements | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total non-service cost (benefit) | (28) |  |  | (3) |  |  | (22) |  |  | (4) |  |  | (1) |  |  | — |
Net periodic benefit cost (benefit) | $ | (28) |  |  | $ | — |  |  | $ | (22) |  |  | $ | (2) |  |  | $ | (1) |  |  | $ | — |
| Pension Benefit Plans |  | Other Postretirement Benefit Plans
| 2024 |  | 2023 |  | 2024 |  | 2023
Six Months Ended June 30 | U.S. Plans |  | Non-U.S. Plans |  | U.S. Plans |  |  | Non-U.S. Plans |  |  |  |
(in millions of U.S. dollars) |  |  |  |  |  |
Service cost: | $ | — |  |  | $ | 5 |  |  | $ | — |  |  |  | $ | 4 |  |  | $ | — |  |  | $ | — |
Non-service cost (benefit): |  |  |  |  |  |  |  |  |  |  |  |
Interest cost | 67 |  |  | 18 |  |  | 68 |  |  |  | 18 |  |  | 1 |  |  | 1 |
Expected return on plan assets | (122) |  |  | (25) |  |  | (112) |  |  |  | (25) |  |  | (2) |  |  | (2) |
Amortization of net actuarial (gain) loss | (1) |  |  | 1 |  |  | — |  |  |  | — |  |  | (1) |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  |  | — |  |  | — |  |  | — |
Settlements | — |  |  | — |  |  | — |  |  |  | — |  |  | — |  |  | — |
Total non-service cost (benefit) | (56) |  |  | (6) |  |  | (44) |  |  |  | (7) |  |  | (2) |  |  | (1) |
Net periodic benefit cost (benefit) | $ | (56) |  |  | $ | (1) |  |  | $ | (44) |  |  |  | $ | (3) |  |  | $ | (2) |  |  | $ | (1) |
The line items in which the service cost and non-service cost (benefit) components of net periodic cost (benefit) are included in the Consolidated statements of operations were as follows:
| Pension Benefit Plans |  | Other Postretirement Benefit Plans
Three Months Ended June 30 | 2024 |  | 2023 |  | 2024 |  | 2023
(in millions of U.S. dollars) |  |  |
Service cost: |  |  |  |  |  |  |
Losses and loss expenses | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Administrative expenses | 3 |  |  | 2 |  |  | — |  | — |
Total service cost | 3 |  |  | 2 |  | — |  | —
Non-service cost (benefit): |  |  |  |  |  |  |
Losses and loss expenses | (3) |  |  | (3) |  |  | — |  | —
Administrative expenses | (28) |  |  | (23) |  |  | (1) |  |  | — |
Total non-service cost (benefit) | (31) |  |  | (26) |  |  | (1) |  |  | — |
Net periodic benefit cost (benefit) | $ | (28) |  |  | $ | (24) |  |  | $ | (1) |  |  | $ | — |
| Pension Benefit Plans |  | Other Postretirement Benefit Plans
Six Months Ended June 30 | 2024 |  | 2023 |  | 2024 |  | 2023
(in millions of U.S. dollars) |  |  |
Service cost: |  |  |  |  |  |  |
Losses and loss expenses | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Administrative expenses | 5 |  | 4 |  |  | — |  | —
Total service cost | 5 |  | 4 |  |  | — |  | —
Non-service cost (benefit): |  |  |  |  |  |  |
Losses and loss expenses | (6) |  |  | (5) |  |  | — |  | —
Administrative expenses | (56) |  |  | (46) |  |  | (2) |  |  | (1) |
Total non-service cost (benefit) | (62) |  |  | (51) |  |  | (2) |  |  | (1) |
Net periodic benefit cost (benefit) | $ | (57) |  |  | $ | (47) |  |  | $ | (2) |  |  | $ | (1) |

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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 -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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