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Derivative Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Foreign Currency Contracts |  |  |  |
Total gain (loss) | $ 3 | $ (1) | $ 4 | $ (7)
Exchange Contract [Member] |  |  |  |
Foreign Currency Contracts |  |  |  |
Total gain (loss) | 9 | 1 | 4 | (7)
Forward Contracts [Member] |  |  |  |
Foreign Currency Contracts |  |  |  |
Total gain (loss) |  | (1) | (1) | 1
Metal Contract [Member] |  |  |  |
Foreign Currency Contracts |  |  |  |
Total gain (loss) | $ (6) | $ (1) | $ 1 | $ (1)

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- Definition Net Increase or Decrease in the fair value of the derivative or group of derivatives included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959 + Details
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