XML 208 R169.htm IDEA: XBRL DOCUMENT v3.8.0.1

Investments held to maturity (Details Text) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investments Held To Maturity Details Text [Abstract]
Financial instruments pledged as collateral and classified as held to maturity		R$ 431
Investments held to maturity pledged as a guarantee for liabilities	R$ 2,005	1,825
Losses on investments held-to-maturity	R$ 54,520	R$ 0	R$ 0

X

- Definition

Financial instruments pledged as collateral and classified as held to maturity

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Investments held to maturity (Details Text)

+ References

No definition available.

+ Details

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

Investments held to maturity pledged as a guarantee for liabilities

+ References

No definition available.

+ Details

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Namespace Prefix:	bbd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The gains (losses) on held-to-maturity investments. [Refer: Held-to-maturity investments]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 20
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_20_a_iii&doctype=Standard&book=B
-URIDate 2017-03-09

+ Details

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