HELD TO MATURITY SECURITIES (Details) (BRL) In Millions	Dec. 31, 2010	Dec. 31, 2009
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,110	2,124
Unrealized Gains	604	362
Unrealized Losses	0	0
Fair value	3,110	2,124
Brazilian Federal Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	2,099	1,273
Unrealized Gains	569	299
Unrealized Losses	0	0
Fair value	2,668	1,572
Brazilian Government External Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	226	238
Unrealized Gains	28	42
Unrealized Losses	0	0
Fair value	254	280
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	16	17
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair value	16	17
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	165	234
Unrealized Gains	7	21
Unrealized Losses	0	0
Fair value	172	255

This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

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As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

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- Definition

As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss.

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