21. Employees benefits (Details 5) R$ in Thousands	12 Months Ended
Dec. 31, 2019 BRL (R$)
Employees Benefits Details 5Abstract
Service cost	R$ 8,610
Interest cost rates	233,039
Participants' contributions	(31,712)
Net profitability on financial assets	(192,965)
Expense to be recognized by employer	R$ 8,362

The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 147
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_147_b&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 148
-Subparagraph d
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_148_d_iii&doctype=Standard
-URIDate 2018-03-16

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