Derivative Instruments (Details 3) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Cash flow hedges [Member] \| Pay Fixed Receive Floating Swaps Interest Rate Contract [Member]
Summary of effective portion of the gains (losses) recognized in other comprehensive income and the gains (losses) reclassified from other comprehensive income (Loss) into earnings
Gains (Losses) Recognized in Other Comprehensive Income (Loss)	$ (120)	$ (111)	$ (199)	$ (317)
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) into Earnings	(34)	(34)	(103)	(113)
Net investment hedges [Member] \| Foreign exchange forward contracts [Member]
Summary of effective portion of the gains (losses) recognized in other comprehensive income and the gains (losses) reclassified from other comprehensive income (Loss) into earnings
Gains (Losses) Recognized in Other Comprehensive Income (Loss)	$ (57)	$ (53)	$ (104)	$ (36)

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

-Subparagraph b

-Clause 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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