Income taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income taxes

Summary of income tax expense reconciled to the statutory rates

	Three-month period ended (unaudited)
	December 31, 2011						September 30, 2011						December 31, 2010
	Brazil		Foreign		Total		Brazil		Foreign		Total		Brazil		Foreign		Total
Income before discontinued operations, income taxes, equity results and noncontrolling interests	5,259		294		5,553		4,187		793		4,980		5,581		1,301		6,882
Exchange variation (not taxable) or not deductible	—		96		96		—		(188	)	(188	)	—		114		114
	5,259		390		5,649		4,187		605		4,792		5,581		1,415		6,996
Tax at Brazilian composite rate	(1,788	)	(133	)	(1,921	)	(1,424	)	(207	)	(1,631	)	(1,898	)	(481	)	(2,379	)
Adjustments to derive effective tax rate:
Tax benefit on interest attributed to stockholders	383		—		383		578		—		578		369		—		369
Difference on tax rates of foreign income	—		117		117		—		331		331		—		699		699
Tax incentives	274		—		274		67		—		67		198		—		198
Social contribution contingency payment	—		—		—		506		—		506		—		—		—
Reversal/Constitution of provisions for loss of tax loss carryfoward	129		(285	)	(156	)	—		—		—		—		—		—
Other non-taxable, income/non deductible expenses	63		93		156		36		(238	)	(202	)	82		(106	)	(24	)
Income tax per consolidated statements of income	(939	)	(208	)	(1,147	)	(237	)	(114	)	(351	)	(1,249	)	112		(1,137	)
	Year ended as of
	December 31, 2011						December 31, 2010						December 31, 2009
	Brazil		Foreign		Total		Brazil		Foreign		Total		Brazil		Foreign		Total
Income before discontinued operations, income taxes, equity results and noncontrolling interests	21,267		5,532		26,799		16,586		3,728		20,314		10,024		(2,901	)	7,123
Exchange variation (not taxable) or not deductible	—		26		26		—		265		265		—		5,162		5,162
	21,267		5,558		26,825		16,586		3,993		20,579		10,024		2,261		12,285
Tax at Brazilian composite rate	(7,231	)	(1,890	)	(9,121	)	(5,639	)	(1,358	)	(6,997	)	(3,408	)	(769	)	(4,177	)
Tax benefit on interest attributed to stockholders	1,655		—		1,655		995		—		995		502		—		502
Difference on tax rates of foreign income	—		1,415		1,415		—		1,673		1,673		—		1,079		1,079
Tax incentives	704		—		704		642		—		642		148		—		148
Social contribution contingency payment	506		—		506		—		—		—		—		—		—
Reversal/Constitution of provisions for loss of tax loss carryfoward	129		(426	)	(297	)	—		—		—		—		—		—
Other non-taxable, income/non deductible expenses	48		(192	)	(144	)	13		(31	)	(18	)	100		248		348
Income tax per consolidated statements of income	(4,189	)	(1,093	)	(5,282	)	(3,989	)	284		(3,705	)	(2,658	)	558		(2,100	)

Reconciliation of amounts due to uncertainty in income taxes

	Three-month period ended (unaudited)						Year ended as of December 31,
	December 31, 2011		September 30, 2011		December 31, 2010		2011		2010		2009
Beginning of the period	338		372		392		2,555		396		657
Increase resulting from tax positions taken	1		1		2,121		1,076		2,130		47
Decrease resulting from tax positions taken (a)	(90	)	(2	)	(2	)	(3,409	)	(24	)	(474	)
Cumulative translation adjustments	14		(33	)	44		41		53		166
End of the period	263		338		2,555		263		2,555		396

(a) In July 2011, we made a payment as a consequence of a Brazilian court decision in a case related to the exemption of the Social Contribution (Contribuição Social sobre o Lucro Líquido).

Schedule of deferred tax assets and liabilities

	December 31, 2011		December 31, 2010
Current deferred tax assets
Accrued expenses deductible only when disbursed	203		386
Assets
Related to provision for losses and write-downs of investments
Employee postretirement benefits provision	640		665
Tax loss carryforwards	916		732
Fair value of financial instruments	610		379
Asset retirement obligation	389		322
Other temporary differences (mainly contingencies provisions)	794		855
	3,349		2,953
Liabilities
Prepaid retirement benefit	(509	)	(617	)
Fair value adjustments in business combinations	(7,311	)	(7,745	)
Social contribution	—		(2,145	)
Other temporary differences	(463	)	(421	)
	(8,283	)	(10,928	)
Valuation allowance
Beginning balance	(110	)	(106	)
Change in allowance	(16	)	(4	)
Ending balance	(126	)	(110	)
Net long-term deferred tax liabilities	(5,060	)	(8,085	)
Asset	594		—
Liabilities	(5,654	)	(8,085	)
Total	(5,060	)	(8,085	)