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Employee benefits (Tables) | 12 Months Ended
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Dec. 31, 2018
Employee benefits |
Schedule of key actuarial economic and biometric assumptions used in the calculations of liability |
|  | 12/31/2018 |  | 12/31/2017 |
Discount rate - health plan |  | 4.91% p.a |  | 5.39% p.a |
Discount rate - life insurance |  | 4.91% p.a |  | 5.39% p.a |
Medical cost growth rate above basic inflation |  | 3.25% p.a |  | 3.25% p.a |
Economic inflation |  | 4.00% p.a |  | 4.40% p.a |
Biometric table of general mortality |  | AT-2000 |  | AT-2000 |
Biometric table of mortality of disabled persons |  | IAPB 57 |  | IAPB 57 |
Summary of sensitivity analysis of actuarial liabilities | On December 31, 2018, the sensitivity of the balance of actuarial liabilities to the changes in the main assumptions used, considering that all others remain unchanged, is as follows:
|  | Change |  | Increase in liability |  | Decrease in liabiliy |
Discount rate |  | 0.50% |  | Decrease of 5.67% |  | Increase of 6.25% |
Medical cost growth rate |  | 0.50% |  | Increase of 6.41% |  | Decrease of 5.86% |
Mortality |  | 1 year |  | Increase of 0.47% |  | Decrease of 2.27% |
Schedule of changes in actuarial liabilities |
Opening balance on December 31, 2016 |  | 339,009
Interest on actuarial liability |  | 38,022
Actuarial gain |  | (4,173)
Benefits paid in the year |  | (21,595)
Balance at December 31, 2017 |  | 351,263
Interest on actuarial liability |  | 35,920
Actuarial loss |  | 69,305
Benefits paid in the year |  | (26,061)
Closing balance on December 31, 2018 |  | 430,427

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- Definition The disclosure of a net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_140_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The disclosure of a sensitivity analysis for significant actuarial assumptions used to determine the present value of a defined benefit obligation. [Refer: Actuarial assumptions [member]; Defined benefit obligation, at present value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 145 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_145&doctype=Standard -URIDate 2018-03-16 + Details
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