Subordinated liabilities (Details 2) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Currency Subordinated Liabilities [Abstract]
Real	R$ 519,230	R$ 466,246	R$ 8,097,304
Total	R$ 519,230	R$ 466,246	R$ 8,097,304
Average Interest Rate (%)
Real	7.50%	9.60%	14.60%
Total	7.50%	9.60%	14.60%

The amount of liabilities that are subordinate to other liabilities with respect to claims.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant