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Commitments and Contingencies Guarantees (Details) (USD $) In Millions, unless otherwise specified |  |  |  |  | 60 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 Customer Lines Of Credit For Brazilian Subsidiary | Dec. 31, 2012 Customer Lines Of Credit For Brazilian Subsidiary | Jun. 30, 2013 Guarantee of Indebtedness of Others | Dec. 31, 2012 Guarantee of Indebtedness of Others | Dec. 15, 2017 Line of Credit | Jun. 30, 2013 Line of Credit
Guarantor Obligations [Line Items] |  |  |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 388 | $ 449 | $ 1,400 | $ 1,400 |  | $ 50
Guarantor Obligations, Term |  |  |  |  | 5 |

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Describe the approximate term of the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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