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Derivative Instruments and Hedging Activities - Pre-Tax (Losses) Gains (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Derivative [Line Items] |  |  |
Total (losses) gains |  | $ (1) | $ 8
Exchange Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Total (losses) gains | (2) | 3 | 3
Forward Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Total (losses) gains |  | 3 | (2)
Metals Contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Total (losses) gains | $ 2 | $ (7) | $ 7

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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=7476318&loc=SL5618551-113959 + Details
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- Details
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