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Postretirement benefits Postretirement benefits | 9 Months Ended
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Sep. 30, 2017
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:
| Three Months Ended September 30 |
| Pension Benefits |  |  | Other Postretirement Benefits |
| U.S. Plans |  |  | Non-U.S. Plans |  |  | Total |  |  | U.S. Plans |  |  | Non-U.S. Plans |  |  | Total |
(in millions of U.S. dollars) |  |  |  |  |
2017 |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 15 |  |  | $ | 6 |  |  | $ | 21 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 27 |  |  | 6 |  |  | 33 |  |  | 1 |  |  | 1 |  |  | 2 |
Expected return on plan assets | (47 | ) |  | (11 | ) |  | (58 | ) |  | (2 | ) |  | — |  |  | (2 | )
Amortization of net actuarial loss | — |  |  | 1 |  |  | 1 |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | (22 | ) |  | — |  |  | (22 | )
Curtailments | — |  |  | — |  |  | — |  |  | (32 | ) |  | — |  |  | (32 | )
Net periodic (benefit) cost | $ | (5 | ) |  | $ | 2 |  |  | $ | (3 | ) |  | $ | (55 | ) |  | $ | 1 |  |  | $ | (54 | )
2016 |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 20 |  |  | $ | 6 |  |  | $ | 26 |  |  | $ | 4 |  |  | $ | — |  |  | $ | 4 |
Interest cost | 26 |  |  | 8 |  |  | 34 |  |  | 4 |  |  | — |  |  | 4 |
Expected return on plan assets | (42 | ) |  | (10 | ) |  | (52 | ) |  | (3 | ) |  | — |  |  | (3 | )
Amortization of net actuarial loss | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Curtailments | (4 | ) |  | — |  |  | (4 | ) |  | — |  |  | — |  |  | — |
Settlements | (1 | ) |  | — |  |  | (1 | ) |  | — |  |  | — |  |  | — |
Net periodic (benefit) cost | $ | (1 | ) |  | $ | 4 |  |  | $ | 3 |  |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |
| Nine Months Ended September 30 |
| Pension Benefits |  |  | Other Postretirement Benefits |
| U.S. Plans |  |  | Non-U.S. Plans |  |  | Total |  |  | U.S. Plans |  |  | Non-U.S. Plans |  |  | Total |
(in millions of U.S. dollars) |  |  |  |  |
2017 |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 47 |  |  | $ | 14 |  |  | $ | 61 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | 2 |
Interest cost | 79 |  |  | 20 |  |  | 99 |  |  | 2 |  |  | 1 |  |  | 3 |
Expected return on plan assets | (142 | ) |  | (31 | ) |  | (173 | ) |  | (4 | ) |  | — |  |  | (4 | )
Amortization of net actuarial loss | — |  |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | (68 | ) |  | — |  |  | (68 | )
Curtailments | — |  |  | (8 | ) |  | (8 | ) |  | (32 | ) |  | — |  |  | (32 | )
Net periodic (benefit) cost | $ | (16 | ) |  | $ | (3 | ) |  | $ | (19 | ) |  | $ | (101 | ) |  | $ | 2 |  |  | $ | (99 | )
2016 |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 57 |  |  | $ | 15 |  |  | $ | 72 |  |  | $ | 8 |  |  | $ | 1 |  |  | $ | 9 |
Interest cost | 80 |  |  | 24 |  |  | 104 |  |  | 13 |  |  | — |  |  | 13 |
Expected return on plan assets | (121 | ) |  | (30 | ) |  | (151 | ) |  | (7 | ) |  | — |  |  | (7 | )
Amortization of net actuarial loss | — |  |  | 2 |  |  | 2 |  |  | — |  |  | — |  |  | — |
Curtailments | (4 | ) |  | — |  |  | (4 | ) |  | — |  |  | — |  |  | — |
Settlements | (1 | ) |  | — |  |  | (1 | ) |  | — |  |  | — |  |  | — |
Net periodic cost | $ | 11 |  |  | $ | 11 |  |  | $ | 22 |  |  | $ | 14 |  |  | $ | 1 |  |  | $ | 15 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -URI http://asc.fasb.org/topic&trid=2127225 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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- References No definition available. + Details
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