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Derivative Instruments and Hedging Activities - Pre-Tax (Loss) Gain (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Derivative [Line Items] |  |  |  |
Total (loss) gain | $ (5) | $ 3 |  | $ 4
Exchange Contracts [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Total (loss) gain |  | 9 | 7 | 4
Forward Contracts [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Total (loss) gain |  |  | 2 | (1)
Metals Contracts [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Total (loss) gain | $ (5) | $ (6) | $ (9) | $ 1

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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