Financial Instruments (Fair Value of Derivatives) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives	$ 342,000
Percentage Of Notional Amount That Is Associated With Reducing Or Eliminating Interest Rate, Currency, Or Market Risk	88.00%
Derivative liabilities	2,366
Netting adjustment of derivative gross asset	(3,583)	(3,867)
Netting adjustment of derivative gross liability	(3,573)	(3,857)
Derivative asset, fair value	7,207	7,489
Derivative liability, fair value	2,366	2,799
Cumulative gain (loss) adjustment for non performance risk	(10)	(10)
Interest Rate Contract [Member] \| Derivatives Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	5,213	5,959
Derivative liabilities	2,364	2,675
Interest Rate Contract [Member] \| Derivatives Not Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	195	294
Derivative liabilities	289	552
Foreign Exchange Contract [Member] \| Derivatives Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	3,036	2,965
Derivative liabilities	2,452	2,533
Foreign Exchange Contract [Member] \| Derivatives Not Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1,905	1,602
Derivative liabilities	795	846
Other Contract [Member] \| Derivatives Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2	5
Derivative liabilities	0	0
Other Contract [Member] \| Derivatives Not Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	439	531
Derivative liabilities	39	50
Derivatives Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	8,251	8,929
Derivative liabilities	4,816	5,208
Derivatives Not Accounted For As Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,539	2,427
Derivative liabilities	1,123	1,448
Derivatives Associated With Interest Rate, Currency Or Market Risk Reduction Or Elimination [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives	$ 300,000

This item represents the cumulative gain or loss adjustment for non-performance risk included in fair value of derivatives.

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- Definition

Derivative Fair Value Of Derivative Assets Net Of Master Netting Agreement

+ Details

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- Definition

Derivative Fair Value Of Derivative Liability, Net Of Master Netting Agreement

+ Details

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- Definition

This item represents the impact of netting across all derivative types which reflects the impact of legally enforceable master netting agreements to settle positive and negative positions, and the cumulative adjustment for non-performance risk.

+ Details

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- Definition

+ Details

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- Definition

Percentage Of Notional Amount That Is Associated With Reducing Or Eliminating Interest Rate, Currency, Or Market Risk between Financial Assets and Liabilities in the Financial Services businesses

+ Details

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- Definition

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ 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),(c)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph a
-Clause 1
-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 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.

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Notional Amount
-URI http://asc.fasb.org/extlink&oid=6519104

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