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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
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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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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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