31. Net Operating Revenue (Details 2) - Facilities sharing R$ in Thousands	Dec. 31, 2018 BRL (R$)
DisclosureOfReceivablesFromNoncancelableLeasesLineItems [Line Items]
Receivables from non-cancelable leases	R$ 23,663
Less than 1 year
DisclosureOfReceivablesFromNoncancelableLeasesLineItems [Line Items]
Receivables from non-cancelable leases	1,142
1 to 5 years
DisclosureOfReceivablesFromNoncancelableLeasesLineItems [Line Items]
Receivables from non-cancelable leases	5,710
Over 5 years
DisclosureOfReceivablesFromNoncancelableLeasesLineItems [Line Items]
Receivables from non-cancelable leases	R$ 16,811

The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer that is unconditional. A right to consideration is unconditional if only the passage of time is required before payment of that consideration is due.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2018-01-01
-Paragraph 105
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2018-03-01&anchor=para_105&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2018-01-01
-Paragraph 116
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2018-03-01&anchor=para_116_a&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_ReceivablesFromContractsWithCustomers
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant