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Derivative Financial Instruments - Outstanding Foreign Currency Forward Contracts (Detail) In Millions, unless otherwise specified | Dec. 31, 2013 USD ($) | Dec. 31, 2013 CAD | Dec. 31, 2013 DKK | Dec. 31, 2013 EUR (€) | Dec. 31, 2013 GBP (£) | Dec. 31, 2013 NOK | Dec. 31, 2013 SGD | Dec. 31, 2012 USD ($) | Dec. 31, 2012 CAD | Dec. 31, 2012 DKK | Dec. 31, 2012 EUR (€) | Dec. 31, 2012 GBP (£) | Dec. 31, 2012 NOK | Dec. 31, 2012 SGD | Dec. 31, 2013 Forward Contracts [Member] USD ($) | Dec. 31, 2013 Forward Contracts [Member] BRL | Dec. 31, 2013 Forward Contracts [Member] CAD | Dec. 31, 2013 Forward Contracts [Member] DKK | Dec. 31, 2013 Forward Contracts [Member] EUR (€) | Dec. 31, 2013 Forward Contracts [Member] GBP (£) | Dec. 31, 2013 Forward Contracts [Member] NOK | Dec. 31, 2013 Forward Contracts [Member] RUB | Dec. 31, 2013 Forward Contracts [Member] SEK | Dec. 31, 2013 Forward Contracts [Member] SGD | Dec. 31, 2012 Forward Contracts [Member] USD ($) | Dec. 31, 2012 Forward Contracts [Member] BRL | Dec. 31, 2012 Forward Contracts [Member] CAD | Dec. 31, 2012 Forward Contracts [Member] DKK | Dec. 31, 2012 Forward Contracts [Member] EUR (€) | Dec. 31, 2012 Forward Contracts [Member] GBP (£) | Dec. 31, 2012 Forward Contracts [Member] NOK | Dec. 31, 2012 Forward Contracts [Member] RUB | Dec. 31, 2012 Forward Contracts [Member] SEK | Dec. 31, 2012 Forward Contracts [Member] SGD
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Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency, Cash flow hedging | $ 357 | 16 | 278 | € 406 | £ 23 | 10,503 | 17 | $ 331 |  | 134 | € 389 | £ 6 | 6,281 | 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency, Non-designated hedging |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 715 |  | 3 | 177 | € 310 | £ 14 | 3,257 | 2,149 | 4 | 3 | $ 967 | 135 | 2 | 177 | € 225 | £ 9 | 1,684 | 1,467 | 5 | 24

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- Definition Fair value as of the balance sheet date of all foreign currency derivatives designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(b),(c)(1) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Net fair value of all derivative instruments not designated as a hedging instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13495-108611 + Details
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