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Debt (Schedule Of Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified |  |  |  | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |
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Jan. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2011 6% Notes, Due 2012 [Member] | Dec. 31, 2010 6% Notes, Due 2012 [Member] | Aug. 31, 2010 6% Notes, Due 2012 [Member] | Dec. 31, 2011 5.375% Notes, Due 2013 [Member] | Dec. 31, 2010 5.375% Notes, Due 2013 [Member] | Dec. 31, 2011 6% Notes, Due 2013 [Member] | Dec. 31, 2010 6% Notes, Due 2013 [Member] | Dec. 31, 2011 5.25% Convertible Notes, Due 2014 [Member] | Dec. 31, 2010 5.25% Convertible Notes, Due 2014 [Member] | Dec. 31, 2011 5.55% Notes, Due 2017 [Member] | Dec. 31, 2010 5.55% Notes, Due 2017 [Member] | Dec. 31, 2011 6.5% Bonds, Due 2018 [Member] | Dec. 31, 2010 6.5% Bonds, Due 2018 [Member] | Dec. 31, 2011 6.75% Notes, Due 2018 [Member] | Dec. 31, 2010 6.75% Notes, Due 2018 [Member] | Dec. 31, 2011 5.72% Notes, Due 2019 [Member] | Dec. 31, 2010 5.72% Notes, Due 2019 [Member] | Dec. 31, 2011 6.15% Notes, Due 2020 [Member] | Dec. 31, 2010 6.15% Notes, Due 2020 [Member] | Dec. 31, 2011 5.40% Notes, Due 2021 [Member] | Dec. 31, 2010 5.40% Notes, Due 2021 [Member] | Dec. 31, 2011 5.87% Notes, Due 2022 [Member] | Dec. 31, 2010 5.87% Notes, Due 2022 [Member] | Dec. 31, 2011 5.9% Notes, Due 2027 [Member] | Dec. 31, 2010 5.9% Notes, Due 2027 [Member] | Dec. 31, 2011 6.75% Bonds, Due 2028 [Member] | Dec. 31, 2010 6.75% Bonds, Due 2028 [Member] | Dec. 31, 2011 5.95% Notes Due 2037 [Member] | Dec. 31, 2010 5.95% Notes Due 2037 [Member] | Dec. 31, 2010 BNDES Loans, Due 2012-2029 [Member] | Dec. 31, 2011 BNDES Loans, Due 2012-2029 [Member] | Dec. 31, 2011 Other [Member] | Dec. 31, 2010 Other [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  | $ 9,085 | $ 9,073 | $ 322 | $ 322 |  |  | $ 553 | $ 422 | $ 750 | $ 575 | $ 575 | $ 750 | $ 750 | $ 250 | $ 250 | $ 750 | $ 750 | $ 750 | $ 750 | $ 1,000 | $ 1,000 | $ 1,250 |  | $ 627 | $ 627 | $ 625 | $ 625 | $ 300 | $ 300 | $ 625 | $ 625 | $ 899 | $ 627 | $ 212 | [1] | $ 297 | [1]
Less: amount due within one year |  | 445 | 231 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, excluding amount due within one year |  | $ 8,640 | $ 8,842 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, interest rate | 6.00% |  |  | 6.00% |  | 6.00% | 5.375% |  | 6.00% |  | 5.25% |  | 5.55% |  | 6.50% |  | 6.75% |  | 5.72% |  | 6.15% |  | 5.40% |  | 5.87% |  | 5.90% |  | 6.75% |  | 5.95% |  |  |  |  |  |  |
Debt instrument, maturity date |  |  |  | 2012 |  |  | 2013 |  | 2013 |  | 2014 |  | 2017 |  | 2018 |  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2027 |  | 2028 |  | 2037 |  |  |  |  |  |  |
Debt instrument, maturity date range, start |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2012 |  |  |  |  |
[1] | Other includes various financing arrangements related to subsidiaries, unamortized debt discounts related to the outstanding notes and bonds listed in the table above, a beneficial conversion feature related to the convertible notes (see below), and adjustments to the carrying value of long-term debt related to interest swap contracts accounted for as fair value hedges (see the Derivatives section of Note X).

X
- Definition Debt instruments maturity date. + References No definition available. + Details
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X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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X
- Definition When presenting a range of maturity dates, the earliest date when the outstanding debt instruments are required to be repaid. May be presented in a variety of ways (for example: year only, month and year, day, month and year, and number of years). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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X
- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond 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 FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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X
- Definition 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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X
- Definition Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) 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 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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