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Commitments and Contingencies Guarantees (Details) (USD $) In Millions, unless otherwise specified |  |  |  |  | 3 Months Ended
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Mar. 31, 2014 Customer Lines Of Credit For Brazilian Subsidiary | Dec. 31, 2013 Customer Lines Of Credit For Brazilian Subsidiary | Mar. 31, 2014 Guarantee of Indebtedness of Others | Dec. 31, 2013 Guarantee of Indebtedness of Others | Mar. 31, 2014 Line of Credit
Guarantor Obligations [Line Items] |  |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 493 | $ 485 | $ 1,200 | $ 1,300 | $ 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 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 + Details
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