OTHER NON-INTEREST INCOME AND EXPENSES (Details Textuals) (BRL) In Millions	12 Months Ended
Dec. 31, 2008	Dec. 31, 2009 Visa [Member]	Dec. 31, 2009 Allianz [Member]
Schedule of Equity Method Investments [Line Items]
Gain on sale of shares		345	25
Gain on exchange of shares of Bovespa Holding S.A.	424

Gain (loss) on entity's disposition of equity in securities of subsidiaries or 50 percent or less owned persons. Reflects the difference in the parent company's carrying amount of the equity interest in the subsidiary (or equity method investee) immediately before and after all stock transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 9
-Section 04
-Paragraph 13
-Subparagraph g

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13(g))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration