XML 223 R184.htm IDEA: XBRL DOCUMENT v3.8.0.1

Property and equipment (Details Text) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property And Equipment Details Text [Abstract]
Depreciation expense	R$ 1,237,328	R$ 1,141,636	R$ 1,057,722

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- Definition

Property and equipment (Details Text)

+ References

No definition available.

+ Details

Name:	bbd_PropertyAndEquipmentDetailsTextAbstract
Namespace Prefix:	bbd_
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Balance Type:	na
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- Definition

The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

+ Details

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Period Type:	duration