Name:	us-gaap_LongTermDebtAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Article 5

Long-term debt (Details) In Millions	Mar. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Mar. 31, 2011 Foreign Debt [Member] USD ($)	Mar. 31, 2011 Foreign Debt [Member] EUR (€)	Dec. 31, 2010 Foreign Debt [Member] USD ($)	Dec. 31, 2010 Foreign Debt [Member] EUR (€)	Mar. 31, 2011 Brazilian debt [Member] USD ($)	Dec. 31, 2010 Brazilian debt [Member] USD ($)
Long-term debt
US dollars			$ 1,078		$ 2,384
US dollars			2,580		2,530
Others			22		18
Others			278		217
Fixed Rate Notes - US dollar denominated			0		0
Fixed Rate Notes - US dollar denominated			10,236		10,242
Fixed Rate Notes - EUR denominated				0		0
Fixed Rate Notes - EUR denominated				1,055		1,003
Perpetual notes			0		0
Perpetual notes			78		78
Accrued charges			189		233		175	110
Accrued charges			0		0		0	0
Long-term debt	1,558	2,823	1,289		2,635		269	188
Long-term debt	22,027	21,591	14,227		14,070		7,800	7,521
Brazilian Reais indexed to Long-term Interest Rate - TJLP/CDI							86	76
Brazilian Reais indexed to General Price Index-Market (IGPM)							3,991	3,891
Basket of currencies							5	1
Basket of currencies							142	125
Non-convertible debentures							0	0
Non-convertible debentures							2,844	2,767
US dollars denominated							3	1
US dollars denominated							$ 823	$ 738