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Derivative Financial Instruments (Details) In Millions, unless otherwise specified | Dec. 31, 2011 SEK | Dec. 31, 2011 SGD | Mar. 31, 2012 Forward Contracts [Member] USD ($) | Mar. 31, 2012 Forward Contracts [Member] DKK | Mar. 31, 2012 Forward Contracts [Member] EUR (€) | Mar. 31, 2012 Forward Contracts [Member] GBP (£) | Mar. 31, 2012 Forward Contracts [Member] MXN | Mar. 31, 2012 Forward Contracts [Member] NOK | Mar. 31, 2012 Forward Contracts [Member] RUB | Mar. 31, 2012 Forward Contracts [Member] SEK | Mar. 31, 2012 Forward Contracts [Member] SGD | Dec. 31, 2011 Forward Contracts [Member] USD ($) | Dec. 31, 2011 Forward Contracts [Member] DKK | Dec. 31, 2011 Forward Contracts [Member] EUR (€) | Dec. 31, 2011 Forward Contracts [Member] GBP (£) | Dec. 31, 2011 Forward Contracts [Member] NOK | Dec. 31, 2011 Forward Contracts [Member] RUB
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Outstanding Foreign Currency Forward Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency, Cash flow hedging |  | 10 | $ 381 | 95 | € 405 | £ 17 | 306 | 5,813 |  |  | 7 | $ 402 | 98 | € 456 | £ 2 | 6,639 |
Foreign currency, Non-designated hedging | 4 | 5 | $ 440 | 121 | € 213 | £ 12 |  | 4,293 | 984 | 8 | 135 | $ 483 | 67 | € 161 | £ 9 | 2,310 | 786

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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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 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 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 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611 Reference 3: 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=6947722&loc=d3e13495-108611 + Details
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