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Financing Receivables (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Financing Receivable Recorded Investment [Line Items] |  |  |  |
Financing receivable | $ 343 us-gaap_NotesReceivableNet |  | $ 337 us-gaap_NotesReceivableNet |
Argentina [Member] |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |
Financing receivable | 272 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_AR |  | 278 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_AR |
CAMEROON |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |
Financing receivable | 44 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_CM | [1] | 44 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_CM | [1]
UNITED STATES |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |
Financing receivable | 16 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_US |  | 0 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_US |
Brazil [Member] |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |
Financing receivable | $ 11 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_BR |  | $ 15 us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_BR |
[1] | (1) Represents non-contingent consideration to be received in 2016 from the sale of the businesses in 2014. See Note 16—Discontinued Operations and Held-For-Sale Businesses.

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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + 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 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 + Details
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