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Financial Instruments and Risk Management - Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | $ 43 | $ 36
Total Liability Derivatives | (4) | (1)
Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | 41 | 29
Total Liability Derivatives | (3) |
Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Other Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | 26 | 21
Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Other Payables And Accrued Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Liability Derivatives | (1) |
Designated as Hedging Instrument [Member] | Collars [Member] | Other Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | 10 | 8
Designated as Hedging Instrument [Member] | Collars [Member] | Other Payables And Accrued Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Liability Derivatives | (2) |
Designated as Hedging Instrument [Member] | Currency Options [Member] | Other Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | 5 |
Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | 2 | 7
Total Liability Derivatives | (1) | (1)
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Other Current Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Asset Derivatives | 2 | 7
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Other Payables And Accrued Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total Liability Derivatives | $ (1) | $ (1)

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- Definition Fair value before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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