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Derivative Financial Instruments (Details) (Forward Contracts [Member]) In Millions, unless otherwise specified | Dec. 31, 2011 USD ($) | Dec. 31, 2011 DKK | Dec. 31, 2011 EUR (€) | Dec. 31, 2011 GBP (£) | Dec. 31, 2011 NOK | Dec. 31, 2011 RUB | Dec. 31, 2011 SEK | Dec. 31, 2011 SGD | Dec. 31, 2010 USD ($) | Dec. 31, 2010 DKK | Dec. 31, 2010 EUR (€) | Dec. 31, 2010 GBP (£) | Dec. 31, 2010 NOK | Dec. 31, 2010 RUB | Dec. 31, 2010 SEK | Dec. 31, 2010 SGD
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Outstanding Foreign Currency Forward Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency, Cash flow hedging | $ 402 | 98 | € 456 | £ 2 | 6,639 |  |  | 10 | $ 247 | 31 | € 122 | £ 4 | 4,983 |  |  | 0
Foreign currency, Fair value hedging | 0 |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Foreign currency, Non-designated hedging | $ 483 | 67 | € 161 | £ 9 | 2,310 | 786 | 4 | 5 | $ 328 | 115 | € 97 | £ 8 | 1,442 | 780 | 0 | 0

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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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6935481&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all derivatives designated as foreign currency fair value hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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