Long-Term Financing Receivables (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 agreement		Dec. 31, 2012
Financing Receivable Recorded Investment [Line Items]
Financing receivable	$ 290		$ 239
Argentina [Member]
Financing Receivable Recorded Investment [Line Items]
Number of Foninvemem Agreements	3
Foninvemem Agreement, collection period	10 years
Number of Foninvemem Agreements with active collections	2
Noncurrent receivables	63		120
Financing receivable	247	[1]	196	[1]
Dominican Republic [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	27		35
Brazil [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	$ 16		$ 8

[1] Excludes noncurrent receivables of $63 million and $120 million, respectively, as of June 30, 2013 and December 31, 2012, which have not been converted into long-term financing receivables and currently have no due date.