SHARE BASED COMPENSATION (Details) (Simple Stock Options [Member], BRL)	12 Months Ended
Dec. 31, 2010
Simple Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payments outstanding at the beginning of the year	61,145,491
Share based payments granted	7,549,166
Share based payments exercised (in shares)	(13,038,777)
Share based payments forfeited	(538,426)
Share based payments outstanding at end of the year	55,117,454
Share based payments exercisable as of the year-end	12,744,501
Weighted average exercise price of share based payments outstanding at the beginning of the year	25.46
Weighted average exercise price of share based payments granted	41.48
Weighted average exercise price of share based payments exercised	20.59
Weighted average exercise price of share based payments forfeited	31.04
Weighted average exercise price of share based payments outstanding at end of the year	31.38
Weighted average exercise price of share based payments exercisable as of the year-end	24.12

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 weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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Net number of share options (or share units) granted during the period.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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Number of share options (or share units) exercised during the current period.

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