REGULATORY MATTERS (Details 1) (BRL) In Millions, unless otherwise specified	Dec. 31, 2010	Dec. 31, 2009
Partial Consolidation [Member]
Fixed assets ratio	37.30%	32.90%
Capital excess in relation to fixed assets ratio	9,976	11,711
Full Consolidation [Member]
Fixed assets ratio	14.50%	15.40%
Capital excess in relation to fixed assets ratio	28,669	24,397

Tangible Capital divided by Tangible assets as defined in the regulations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Chapter 17
-Paragraph 15
-Subparagraph 3a
-IssueDate 2006-05-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-URI http://asc.fasb.org/extlink&oid=6918689&loc=d3e65071-112826
-Subparagraph (c)(2)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958568-112826

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant