COMMITMENTS AND CONTINGENT LIABILITIES (Details) (BRL) In Millions	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Loss Contingencies [Line Items]
Contingent liabilities (Note 30b)	2,907	2,535	2,440
Lawsuits Related To Civil Labor Tax and Social Security [Member]
Loss Contingencies [Line Items]
Opening balance (Note 18)	7,651	5,219
Balance arising from business combinations	0	2,989
Reclassification	0	111
Contingencies guaranteed by indemnity clauses (Note 2u)	(707)	(692)
Subtotal	6,944	7,627
Contingent liabilities (Note 30b)	2,907	2,535
Interest and monetary correction	324	433
Increase	3,579	2,505
Reversal	(996)	(403)
Payments	(1,675)	(3,218)
Subtotal	8,176	6,944
Contingencies guaranteed by indemnity clauses (Note 2u)	1,466	707
Closing balance (Note 18)	9,642	7,651
Escrow deposits	4,076	3,219

Commitment and contingencies before changes in the period reflected in income.

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Commitment and contingencies before contingencies guaranteed by indemnity clauses addition.

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Aggregate amount of changes in commitments and contingencies reflected in income attributable to increase during the period.

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Aggregate amount of changes in commitments and contingencies reflected in income attributable to interest and monetary correction.

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Aggregate amount of changes in commitments and contingencies reflected in income attributable to reversal during the period.

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Contingencies guaranteed by indemnity clauses.

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Contingencies guaranteed by indemnity clauses.

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Reclassification of provision for contingent liabilities.

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The net amount, measured at acquisition-date fair value, of all the assets acquired and liabilities assumed that arise from contingencies and were recognized by the entity.

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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities.

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The payments made in the period which reduced loss contingency liabilities.

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The increase (decrease) in the period in loss contingency liabilities.

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