Pension Plans | Other Benefit Plans | |||||||||||||
2015 | 2016 | 2017 | 2015 | 2016 | 2017 | |||||||||
Weighted average discount rate at December 31 (i) for: | ||||||||||||||
Benefit obligations | 3.8 | 2.6 | 2.5 | 4.1 | 3.9 | 3.6 | ||||||||
Net pension cost | 3.7 | 3.8 | 2.6 | 3.9 | 4.1 | 3.9 | ||||||||
Weighted average rate of compensation increase for: | ||||||||||||||
Benefit obligations | 3.8 | 3.9 | 4.0 | 4.6 | 4.6 | 4.6 | ||||||||
Net pension cost | 3.8 | 3.8 | 3.9 | 4.6 | 4.6 | 4.6 | ||||||||
Healthcare cost trend rates: | ||||||||||||||
Immediate trend | — | — | — | 6.2 | 5.9 | 5.8 | ||||||||
Ultimate trend | — | — | — | 4.5 | 4.5 | 4.5 | ||||||||
Year the ultimate trend rate is expected to be achieved | — | — | — | 2030 | 2030 | 2030 | ||||||||
(i) | The weighted average discount rate is determined using publicly available rates for highly-rated bonds by currency in countries where there is a pension or non-pension benefit plan. A lower discount rate would increase the present value of the benefit obligation. |