Commitments and Contingencies Guarantees (Details) (USD $) In Millions, unless otherwise specified					6 Months Ended
Jun. 30, 2014 Customer Lines Of Credit For Brazilian Subsidiary	Dec. 31, 2013 Customer Lines Of Credit For Brazilian Subsidiary	Jun. 30, 2014 Guarantee of Indebtedness of Others	Dec. 31, 2013 Guarantee of Indebtedness of Others	Jun. 30, 2014 Line of Credit
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 356	$ 485	$ 1,500	$ 1,300	$ 50
Guarantor Obligations, Term					5

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.

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

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant