The most significant assumptions used in the determination of the benefit obligation were as follows:
| 2017 | 2016 | |||||||||||||||||||||||||||
| Mexico | United States |
United Kingdom |
Range of rates in other countries |
Mexico | United States |
United Kingdom |
Rates ranges in other countries |
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Discount rates |
9.3 | % | 3.9 | % | 2.4 | % | 1.3% – 6.3% | 9.0 | % | 4.2 | % | 2.6 | % | 1.1% – 7.0% | ||||||||||||||
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Rate of return on plan assets |
9.3 | % | 3.9 | % | 2.4 | % | 1.3% – 6.3% | 9.0 | % | 4.2 | % | 2.6 | % | 1.1% – 7.0% | ||||||||||||||
|
Rate of salary increases |
4.0 | % | — | 3.2 | % | 1.5% – 6.0% | 4.0 | % | — | 3.3 | % | 1.5% – 6.0% | ||||||||||||||||
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The increase (decrease) that would have resulted in the PBO of pensions and other post-employment benefits as of December 31, 2017 are shown below:
| Pensions | Other benefits | Total | ||||||||||||||||||||||||||
| +50 bps | -50 bps | +50 bps | -50 bps | +50 bps | -50 bps | |||||||||||||||||||||||
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Assumptions: |
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Discount Rate Sensitivity |
Ps | (4,028 | ) | 4,426 | (72 | ) | 83 | (4,100 | ) | 4,509 | ||||||||||||||||||
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Salary Increase Rate Sensitivity |
154 | (138 | ) | 34 | (29 | ) | 189 | (166 | ) | |||||||||||||||||||
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Pension Increase Rate Sensitivity |
2,341 | (2,209 | ) | — | — | 2,341 | (2,209 | ) | ||||||||||||||||||||
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