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Receivables (Tables) | 12 Months Ended
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Dec. 31, 2012
Receivables [Abstract] |
Receivables, net | Receivables consisted of the following (in millions):
| December 31,
| 2012 |  | 2011
Accounts receivable | $ | 8,061 |  |  | $ | 8,366 |
Commodity derivative and foreign currency contract receivables | 136 |  |  | 174 |
Notes receivable and other | 26 |  |  | 214 |
| 8,223 |  |  | 8,754 |
Allowance for doubtful accounts | (56 | ) |  | (48 | )
Receivables, net | $ | 8,167 |  |  | $ | 8,706 |
Changes in allowance for doubtful accounts | Changes in the allowance for doubtful accounts consisted of the following (in millions):
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
Balance as of beginning of year | $ | 48 |  |  | $ | 42 |  |  | $ | 45 |
Increase in allowance charged to expense | 21 |  |  | 21 |  |  | 14 |
Accounts charged against the allowance, net of recoveries | (13 | ) |  | (14 | ) |  | (17 | )
Foreign currency translation | — |  |  | (1 | ) |  | — |
Balance as of end of year | $ | 56 |  |  | $ | 48 |  |  | $ | 42 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + 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 210.5-02.3,4) -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, 4 -Article 5 + Details
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- Definition Tabular disclosure of the changes in carrying amount of the allowance for doubtful accounts. + References No definition available. + Details
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