Derivative Financial Instruments (Details 5) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Trading assets [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	$ 98,414	$ 93,768
Trading assets [Member] \| Interest rate contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	70,557	60,719
Trading assets [Member] \| Foreign exchange contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	15,305	15,654
Trading assets [Member] \| Equity contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	847	1,165
Trading assets [Member] \| Precious Metals contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	965	1,842
Trading assets [Member] \| Credit contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	10,739	14,388
Trading assets [Member] \| Other [Member]
Fair value of derivative instruments held for trading purposes
Derivative Assets	1
Trading Liabilities [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	97,859	93,390
Trading Liabilities [Member] \| Interest rate contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	70,631	61,280
Trading Liabilities [Member] \| Foreign exchange contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	14,584	15,413
Trading Liabilities [Member] \| Equity contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	844	1,164
Trading Liabilities [Member] \| Precious Metals contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	847	1,248
Trading Liabilities [Member] \| Credit contracts [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	10,948	14,285
Trading Liabilities [Member] \| Other [Member]
Fair value of derivative instruments held for trading purposes
Derivative Liabilities	$ 5

Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

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-Name FASB Staff Position (FSP)

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

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-Name Statement of Financial Accounting Standard (FAS)

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-Glossary Current Assets

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

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-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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+ Details

- Definition

Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FIN39-1

-Paragraph 10A, 10B

-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 AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 7

-Chapter 3

-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

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-Name Accounting Standards Codification

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-Glossary Current Liabilities

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-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 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details