Financing Receivables (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2013 agreement		Sep. 30, 2012	Dec. 31, 2012
Financing Receivable Recorded Investment [Line Items]
Financing receivable	$ 217			$ 239
Derivative Assets, Gross	198			100
Number of Foninvemem Agreements	3
Foninvemem Agreement, collection period			10 years
Number of Foninvemem Agreements with active collections	2
Argentina [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	182	[1]		196	[1]
Argentina [Member] | Excluded From Financing Receivables [Member]
Financing Receivable Recorded Investment [Line Items]
Noncurrent receivables	127			120
Derivative Assets, Gross	97			69
Dominican Republic [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	12			35
Brazil [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	$ 23			$ 8

[1] Excludes noncurrent receivables of $127 million and $120 million, respectively, as of September 30, 2013 and December 31, 2012, which have not been converted into financing receivables and do not have contractual maturities of greater than one year. Also, excludes the foreign currency-related embedded derivative assets associated with the financing receivables which had a fair value of $97 million and $69 million, respectively, as of September 30, 2013 and December 31, 2012.