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Postretirement benefits | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Compensation and Employee Benefit Plans [Text Block] | Postretirement benefits 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
| 2021 |  | 2020 |  | 2021 |  | 2020
Three Months Ended September 30 | U.S. Plans |  | Non-U.S. Plans |  | U.S. Plans |  | Non-U.S. Plans |  |  |  |
(in millions of U.S. dollars) |  |  |  |
Service cost | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | — |
Non-service cost (benefit): |  |  |  |  |  |  |  |  |  |  |
Interest cost | 18 |  |  | 5 |  |  | 24 |  |  | 6 |  |  | 1 |  |  | 1 |
Expected return on plan assets | (64) |  |  | (10) |  |  | (56) |  |  | (11) |  |  | (1) |  |  | (1) |
Amortization of net actuarial loss | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost (1) | — |  |  | — |  |  | — |  |  | 1 |  |  | — |  |  | (20) |
Settlements | 1 |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |
Total non-service cost (benefit) | (45) |  |  | (5) |  |  | (31) |  |  | (4) |  |  | — |  |  | (20) |
Net periodic benefit cost (benefit) | $ | (45) |  |  | $ | (4) |  |  | $ | (31) |  |  | $ | (3) |  |  | $ | 1 |  |  | $ | (20) |
(1) At June 30, 2021, the remaining prior service cost amortization related to the 2016 harmonization of our U.S. retirement program was fully amortized. Refer to Note 13 to the Consolidated Financial Statements of our 2020 Form 10-K for additional information.
| Pension Benefit Plans |  | Other Postretirement Benefit Plans
| 2021 |  | 2020 |  | 2021 |  | 2020
Nine Months Ended September 30 | U.S. Plans |  | Non-U.S. Plans |  | U.S. Plans |  | Non-U.S. Plans |  |  |  |
(in millions of U.S. dollars) |  |  |  |
Service cost | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 3 |  |  | $ | 1 |  |  | $ | — |
Non-service cost (benefit): |  |  |  |  |  |  |  |  |  |  |
Interest cost | 53 |  |  | 14 |  |  | 74 |  |  | 17 |  |  | 1 |  |  | 2 |
Expected return on plan assets | (191) |  |  | (32) |  |  | (168) |  |  | (32) |  |  | (1) |  |  | (3) |
Amortization of net actuarial loss | — |  |  | 2 |  |  | — |  |  | 1 |  |  | — |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | 1 |  |  | (26) |  |  | (60) |
Settlements | 1 |  |  | — |  |  | 3 |  |  | — |  |  | — |  |  | — |
Total non-service cost (benefit) | (137) |  |  | (16) |  |  | (91) |  |  | (13) |  |  | (26) |  |  | (61) |
Net periodic benefit cost (benefit) | $ | (137) |  |  | $ | (13) |  |  | $ | (91) |  |  | $ | (10) |  |  | $ | (25) |  |  | $ | (61) |
The line items in which the service cost and non-service cost (benefit) components of net periodic benefit cost (benefit) are included in the Consolidated statements of operations were as follows:
|  | Pension Benefit Plans |  | Other Postretirement Benefit Plans
Three Months Ended September 30 |  | 2021 |  | 2020 |  | 2021 |  | 2020
(in millions of U.S. dollars) |  |  |  |
Service cost: |  |  |  |  |  |  |  |
Losses and loss expenses |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Administrative expenses |  | 1 |  |  | 1 |  |  | 1 |  |  | — |
Total service cost |  | 1 |  |  | 1 |  |  | 1 |  |  | — |
Non-service cost (benefit): |  |  |  |  |  |  |  |
Losses and loss expenses |  | (5) |  |  | (3) |  |  | — |  |  | (2) |
Administrative expenses |  | (45) |  |  | (32) |  |  | — |  |  | (18) |
Total non-service cost (benefit) |  | (50) |  |  | (35) |  |  | — |  |  | (20) |
Net periodic benefit cost (benefit) |  | $ | (49) |  |  | $ | (34) |  |  | $ | 1 |  |  | $ | (20) |
|  | Pension Benefit Plans |  | Other Postretirement Benefit Plans
Nine Months Ended September 30 |  | 2021 |  | 2020 |  | 2021 |  | 2020
(in millions of U.S. dollars) |  |  |  |
Service cost: |  |  |  |  |  |  |  |
Losses and loss expenses |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Administrative expenses |  | 3 |  |  | 3 |  |  | 1 |  |  | — |
Total service cost |  | 3 |  |  | 3 |  |  | 1 |  |  | — |
Non-service cost (benefit): |  |  |  |  |  |  |  |
Losses and loss expenses |  | (14) |  |  | (9) |  |  | (3) |  |  | (6) |
Administrative expenses |  | (139) |  |  | (95) |  |  | (23) |  |  | (55) |
Total non-service cost (benefit) |  | (153) |  |  | (104) |  |  | (26) |  |  | (61) |
Net periodic benefit cost (benefit) |  | $ | (150) |  |  | $ | (101) |  |  | $ | (25) |  |  | $ | (61) |

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -URI http://asc.fasb.org/topic&trid=2127225 Reference 4: 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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