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Retirement employee benefits | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Retirement Benefits [Abstract] |
Retirement employee benefits |
18. | Retirement employee benefits
| a. | Defined contribution plans – Under Mexican legislation, the Company makes payments equivalent to 2% of its workers’ daily comprehensive salary to a defined contribution plan that is part of the retirement savings system. The expense was Ps. 4,986, Ps. 6,001 and Ps. 7,162 in 2016, 2017 and 2018, respectively.
In Jamaica, the Company operates a defined contribution pension plan, which is managed by an independent trust. The Company has no further obligation other than its contribution mandated under the plan. The pension plan is financed primarily by payments from employees and the Company.
| b. | Defined benefit plans – According to the Federal Labor Law in Article 162, the Company is required to pay in Mexico a seniority premium as postemployment benefits if an employee leaves and if have at least 15 years of service, which consist of a payment of 12 days per worked year based on the last salary, not to exceed twice the legal minimum wage established by law. The present value of the retirement benefit obligation and the current service cost and past service costs were calculated by independent experts using the projected unit credit method.
The defined benefit plans in Mexico usually expose the Company to actuarial risks such as: interest rate risk, longevity risk and salary risk.
Interest risk |  | A decrease in the interest rate of the 30 years bond will increase the plan liability.
Longevity risk |  | The present value of the defined benefit plan liability is calculated by reference to the best estimate of the mortality of the plan participants, during and after their employment. An increase in the life expectancy of the plan participants will increase the plan’s liability.
Salary risk |  | The present value of the defined benefit plan liability is calculated by reference to the future salaries of the plan participants. As such, an increase in the salary of the plan participants will increase the plan’s liability.
The amount included in the statement of financial position arising from the obligation of the entity for defined benefit plans on December 31, 2016, 2017 and 2018 is as follows:
|  | 2016 |  |  | 2017 |  |  | 2018 |
Present value of defined benefit obligations |  | Ps. |  | 92,575 |  |  | Ps. |  | 112,980 |  |  | Ps. |  | 120,606 |
The table below shows the movements in the present value of defined benefit obligations:
|  | 2016 |  |  | 2017 |  |  | 2018 |
Opening defined benefit obligation |  | Ps. |  | 93,367 |  |  | Ps. |  | 92,575 |  |  | Ps. |  | 112,980 |
Current service cost |  |  |  | 7,233 |  |  |  |  | 9,459 |  |  |  |  | 12,775 |
Interest cost |  |  |  | 7,365 |  |  |  |  | 8,344 |  |  |  |  | 8,907 |
Actuarial (gains) / losses |  |  |  | — |  |  |  |  | — |  |  |  |  | (3,359 | )
Cost per service passed for modification or reduction |  |  |  | — |  |  |  |  | — |  |  |  |  | (10,858 | )
New measurement (gains) / losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial (gains) losses resulting from changes in financial and demographic assumptions |  |  |  | (7,165 | ) |  |  |  | 2,602 |  |  |  |  | 161 |
Actuarial (gains) and losses arising from adjustments for actuarial experience |  |  |  | (8,225 | ) |  |  |  | — |  |  |  |  | — |
Ending defined benefit obligation |  | Ps. |  | 92,575 |  |  | Ps. |  | 112,980 |  |  | Ps. |  | 120,606 |
Below are the amounts for the years ended December 31, 2016, 2017 and 2018 that were recognized in the consolidated statements of profit or loss and other comprehensive income:
|  | 2016 |  |  | 2017 |  |  | 2018 |
Current service cost |  | Ps. |  | 7,233 |  |  | Ps. |  | 9,459 |  |  | Ps. |  | 12,775 |
Interest cost |  |  |  | 7,365 |  |  |  |  | 8,344 |  |  |  |  | 8,907 |
Actuarial (gains) / losses |  |  |  | — |  |  |  |  | — |  |  |  |  | (3,359 | )
Cost per service passed for modification or reduction |  |  |  | — |  |  |  |  | — |  |  |  |  | (10,858 | )
Components of defined benefit costs recognized in net income (Note 24) |  |  |  | 14,598 |  |  |  |  | 17,803 |  |  |  |  | 7,465 |
Measurement of net defined benefit liability: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial (gains) losses arising from changes in financial and demographic assumptions |  |  |  | (7,165 | ) |  |  |  | 2,602 |  |  |  |  | 161 |
Actuarial (gains) and losses arising from adjustments for actuarial experience |  |  |  | (8,225 | ) |  |  |  | — |  |  |  |  | — |
Components of defined benefit costs recognized in other comprehensive income |  |  |  | (15,390 | ) |  |  |  | 2,602 |  |  |  |  | 161 |
Total recognized as employee benefit cost |  | Ps. |  | (792 | ) |  | Ps. |  | 20,405 |  |  | Ps. |  | 7,626 |
The main actuarial assumptions at the reporting date (expressed as weighted average nominal rates) are shown below:
|  | 2016 |  |  | 2017 |  |  | 2018 |
Discount of the projected benefit obligation at present value |  | 7.4% |  |  | 7.6% |  |  | 9.2% |
Salary increase |  | 5.0% |  |  | 5.0% |  |  | 6.0% |
Remaining labor life |  | 18.2 years |  |  | 17.7 years |  |  | 18.6 years |
Inflation |  | 3.4% |  |  | 4.2% |  |  | 6.7% |
The discount rate is determined based on the structure of the interest rate curve of government bonds for 30 years. The net interest cost on the retirement benefit obligation is recorded in profit and loss within the cost of services, in conjunction with the other components of liabilities for retirement benefits. If the discount rate had a variation of 100 basis points upward or downward, the effect on the liability for retirement benefits would be impacted by Ps. 14,321. Assumptions related to expected mortality are based on statistics and experience of the Mexican population. The average life expectancy of an individual retiring at age 65 is 17 years for men and 19 years for women (Demographic Mortality Experience for Active people, EMSSA 2009).

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