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Long-Term Employee Benefit Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Long-Term Employee Benefit Liabilities | Long-term employee benefit liabilities consist of:
|  | 2017 |  |  | 2016 |
Defined benefit pension plans and other [a] |  | $ | 264 |  |  | $ | 313 |
Termination and long service arrangements [b] |  |  | 368 |  |  |  | 319 |
Retirement medical benefits plans [c] |  |  | 31 |  |  |  | 29 |
Other long-term employee benefits |  |  | 7 |  |  |  | 6 |
Long-term employee benefit obligations |  | $ | 670 |  |  | $ | 667 |
Schedule of Company's Defined Benefit Pension Plans | Information about the Company’s defined benefit pension plans is as follows:
|  | 2017 |  |  | 2016 |
Projected benefit obligation |  |  |  |  |  |  |  |
Beginning of year |  | $ | 624 |  |  | $ | 493 |
Current service cost |  |  | 13 |  |  |  | 14 |
Interest cost |  |  | 18 |  |  |  | 21 |
Actuarial losses and changes in actuarial assumptions |  |  | 8 |  |  |  | 28 |
Benefits paid |  |  | (23 | ) |  |  | (22 | )
Benefits paid – settlements [ii] |  |  | — |  |  |  | (32 | )
Acquisition |  |  | — |  |  |  | 129 |
Gain on settlement |  |  | — |  |  |  | (5 | )
Foreign exchange |  |  | 47 |  |  |  | (2 | )
End of year |  |  | 687 |  |  |  | 624 |
Plan assets at fair value [iii] |  |  |  |  |  |  |  |
Beginning of year |  |  | 330 |  |  |  | 326 |
Return on plan assets |  |  | 33 |  |  |  | 22 |
Employer contributions [i] |  |  | 82 |  |  |  | 19 |
Benefits paid |  |  | (18 | ) |  |  | (17 | )
Benefits paid – settlements [ii] |  |  | — |  |  |  | (32 | )
Acquisition |  |  | — |  |  |  | 8 |
Foreign exchange |  |  | 16 |  |  |  | 4 |
End of year |  |  | 443 |  |  |  | 330 |
Ending funded status |  | $ | 244 |  |  | $ | 294 |
Amounts recorded in the consolidated balance sheet |  |  |  |  |  |  |  |
Non-current asset [note 13] |  | $ | (23 | ) |  | $ | (21 | )
Current liability |  |  | 3 |  |  |  | 2 |
Non-current liability |  |  | 264 |  |  |  | 313 |
Net amount |  | $ | 244 |  |  | $ | 294 |
Amounts recorded in accumulated other comprehensive income Unrecognized actuarial losses |  | $ | (135 | ) |  | $ | (144 | )
Net periodic benefit cost |  |  |  |  |  |  |  |
Current service cost |  | $ | 13 |  |  | $ | 14 |
Interest cost |  |  | 18 |  |  |  | 21 |
Return on plan assets |  |  | (20 | ) |  |  | (20 | )
Benefits paid – settlements [ii] |  |  | — |  |  |  | 13 |
Actuarial losses |  |  | 4 |  |  |  | 3 |
Net periodic benefit cost |  | $ | 15 |  |  | $ | 31 |
[i] | During the fourth quarter of 2017, the Company contributed $60 million to fund the Company’s U.S. defined benefit pension plans.
[ii] | During the fourth quarter of 2016, the Company offered a limited lump-sum payout to certain terminated vested plan participants on its U.S. defined benefit pension plan. Under this offer, certain participants were able to voluntarily elect an early payout of their pension benefits, in the form of a lump-sum payment. The lump-sum payment was equal to the present value of the participant’s pension benefits. In connection with the partial settlement, payments of $32 million were distributed from existing defined benefit pension plan assets, and the Company recognized a $13 million non-cash settlement charge [note 3].
[iii] | The asset allocation of the Company’s defined benefit pension plans at December 31, 2017 and the target allocation for 2018 is as follows:
|  | 2018 |  |  | 2017 |
Equity securities |  |  | 55-75 | % |  |  | 50 | %
Fixed income securities |  |  | 25-45 | % |  |  | 35 | %
Cash and cash equivalents |  |  | 0-15 | % |  |  | 15 | %
|  |  | 100 | % |  |  | 100 | %
Future Benefit Payments |
[d] | Future benefit payments
|  | Defined benefit pension plans |  |  | Termination and long service arrangements |  |  | Retirement medical benefits plans |  |  | Total |
Expected employer contributions - 2018 |  | $ | 19 |  |  | $ | 10 |  |  | $ | 2 |  |  | $ | 31 |
Expected benefit payments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 23 |  |  | $ | 10 |  |  | $ | 2 |  |  | $ | 35 |
2019 |  |  | 23 |  |  |  | 11 |  |  |  | 2 |  |  |  | 36 |
2020 |  |  | 24 |  |  |  | 14 |  |  |  | 2 |  |  |  | 40 |
2021 |  |  | 25 |  |  |  | 15 |  |  |  | 2 |  |  |  | 42 |
2022 |  |  | 26 |  |  |  | 18 |  |  |  | 2 |  |  |  | 46 |
Thereafter |  |  | 143 |  |  |  | 99 |  |  |  | 9 |  |  |  | 251 |
|  | $ | 264 |  |  | $ | 167 |  |  | $ | 19 |  |  | $ | 450 |
Termination and Long Service Arrangements [Member] |
Summary of Weighted Average Significant Actuarial Assumptions Adopted in Measuring Company's Obligations and Cost | The weighted average significant actuarial assumptions adopted in measuring the Company’s projected termination and long service benefit obligations and net periodic benefit cost are as follows:
|  | 2017 |  |  | 2016 |
Discount rate |  |  | 2.6 | % |  |  | 2.9 | %
Rate of compensation increase |  |  | 2.6 | % |  |  | 2.7 | %
Schedule of Company's Defined Benefit Pension Plans | Information about the Company’s termination and long service arrangements is as follows:
|  | 2017 |  |  | 2016 |
Projected benefit obligation |  |  |  |  |  |  |  |
Beginning of year |  | $ | 327 |  |  | $ | 295 |
Current service cost |  |  | 20 |  |  |  | 20 |
Interest cost |  |  | 7 |  |  |  | 8 |
Actuarial (gains) losses and changes in actuarial assumptions |  |  | (7 | ) |  |  | 15 |
Benefits paid |  |  | (11 | ) |  |  | (11 | )
Acquisition |  |  | — |  |  |  | 16 |
Foreign exchange |  |  | 42 |  |  |  | (16 | )
Ending funded status |  | $ | 378 |  |  | $ | 327 |
Amounts recorded in the consolidated balance sheet |  |  |  |  |  |  |  |
Current liability |  | $ | 10 |  |  | $ | 8 |
Non-current liability |  |  | 368 |  |  |  | 319 |
Net amount |  | $ | 378 |  |  | $ | 327 |
Amounts recorded in accumulated other comprehensive income |  |  |  |  |  |  |  |
Unrecognized actuarial losses |  | $ | (73 | ) |  | $ | (84 | )
Net periodic benefit cost |  |  |  |  |  |  |  |
Current service cost |  | $ | 20 |  |  | $ | 20 |
Interest cost |  |  | 7 |  |  |  | 8 |
Actuarial losses |  |  | 3 |  |  |  | 1 |
Net periodic benefit cost |  | $ | 30 |  |  | $ | 29 |
Retirement Medical Benefits Plans [Member] |
Summary of Weighted Average Significant Actuarial Assumptions Adopted in Measuring Company's Obligations and Cost | The weighted average discount rates used in measuring the Company’s projected retirement medical benefit obligations and net periodic benefit cost are as follows:
|  | 2017 |  |  | 2016 |
Retirement medical benefit obligations |  |  | 3.4 | % |  |  | 3.8 | %
Net periodic benefit cost |  |  | 3.8 | % |  |  | 3.9 | %
Health care cost inflation |  |  | 6.6 | % |  |  | 7.0 | %
Schedule of Company's Defined Benefit Pension Plans | Information about the Company’s retirement medical benefits plans are as follows:
|  | 2017 |  |  | 2016 |
Projected benefit obligation |  |  |  |  |  |  |  |
Beginning of year |  | $ | 31 |  |  | $ | 32 |
Interest cost |  |  | 1 |  |  |  | 1 |
Actuarial losses (gains) and changes in actuarial assumptions |  |  | 2 |  |  |  | (1 | )
Benefits paid |  |  | (2 | ) |  |  | (1 | )
Foreign exchange |  |  | 1 |  |  |  | — |
Ending funded status |  | $ | 33 |  |  | $ | 31 |
Amounts recorded in the consolidated balance sheet |  |  |  |  |  |  |  |
Current liability |  | $ | 2 |  |  | $ | 2 |
Non-current liability |  |  | 31 |  |  |  | 29 |
Net amount |  | $ | 33 |  |  | $ | 31 |
Amounts recorded in accumulated other comprehensive income |  |  |  |  |  |  |  |
Unrecognized past service costs |  | $ | 1 |  |  | $ | 1 |
Unrecognized actuarial gains |  |  | 8 |  |  |  | 11 |
Total accumulated other comprehensive income |  | $ | 9 |  |  | $ | 12 |
Net periodic benefit cost |  |  |  |  |  |  |  |
Interest cost |  | $ | 1 |  |  | $ | 1 |
Actuarial gains |  |  | (1 | ) |  |  | (1 | )
Net periodic benefit cost |  | $ | — |  |  | $ | — |
Pension Plan, Defined Benefit [Member] |
Summary of Weighted Average Significant Actuarial Assumptions Adopted in Measuring Company's Obligations and Cost | The weighted average significant actuarial assumptions adopted in measuring the Company’s obligations and costs are as follows:
|  | 2017 |  |  | 2016 |
Projected benefit obligation |  |  |  |  |  |  |  |
Discount rate |  |  | 2.9 | % |  |  | 3.1 | %
Rate of compensation increase |  |  | 2.6 | % |  |  | 2.3 | %
Net periodic benefit cost |  |  |  |  |  |  |  |
Discount rate |  |  | 3.1 | % |  |  | 3.2 | %
Rate of compensation increase |  |  | 2.5 | % |  |  | 2.4 | %
Expected return on plan assets |  |  | 5.8 | % |  |  | 5.8 | %

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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