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24. Benefit plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Benefit Plans Tables Abstract |
Benefit plans |
| 12.31.18 |  | 12.31.17
Non-current | 385,098 |  | 477,765
Current | 32,365 |  | 46,375
Total Benefit plans | 417,463 |  | 524,140
Benefit payment obligations |
| 12.31.18 |  | 12.31.17
Benefit payment obligations at beginning | 524,140 |  | 442,170
Current service cost | 32,904 |  | 42,500
Interest cost | 79,304 |  | 126,954
Actuarial losses | 5,638 |  | (22,219)
Result from exposure to inflation for the year | (169,169) |  | (8,692)
Benefits paid to participating employees | (55,354) |  | (56,573)
Benefit payment obligations at period end | 417,463 |  | 524,140
Detail of the charge recognized in the Statement of Comprehensive Income |
| 12.31.18 |  | 12.31.17 |  | 12.31.16
Cost | 32,904 |  | 42,500 |  | 46,320
Interest | 79,304 |  | 126,954 |  | 163,431
Actuarial results - Other comprehensive loss | 5,638 |  | (22,219) |  | (15,555)
| 117,846 |  | 147,235 |  | 194,196
Actuarial assumptions |
| 12.31.18 |  | 12.31.17
Discount rate | 5% |  | 5%
Salary increase | 1% |  | 1%
Inflation | 31% |  | 18%
Benefit plan sensitivity analysis |
|  |  | 12.31.2018
Discount Rate: 4% |  |  |
Obligation |  |  | 459,651
Variation |  |  | 42,188
|  |  | 10%
Discount Rate: 6% |  |  |
Obligation |  |  | 381,587
Variation |  |  | (35,876)
|  |  | (9%)
Salary Increase : 0% |  |  |
Obligation |  |  | 379,992
Variation |  |  | (37,471)
|  |  | (9%)
Salary Increase: 2% |  |  |
Obligation |  |  | 460,939
Variation |  |  | 43,476
|  |  | 10%
Expected payments of benefits |
| In 2019 |  | In 2020 |  | In 2021 |  | In 2022 |  | In 2023 |  | Between 2022 to 2028
At December 31, 2018 |  |  |  |  |  |  |  |  |  |  |
Benefit payment obligations | 32,365 |  | 6,221 |  | 6,207 |  | 6,450 |  | 2,059 |  | 11,128

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