Fair Value Measurement - Credit Adjustments Reflected on Balance Sheet (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Credit adjustments [Abstract]
Derivative receivables balance	$ 65,759	$ 74,983
Derivative payables	57,314	70,656
Derivative Credit Risk Valuation Adjustment, Derivative Assets	(2,352)	(4,238)
Derivative Credit Risk and Funding Valuation Adjustments	(322)
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities	715	830
Structured Notes Balance Net Of DVA	48,808	48,112
Structured note credit adjustments	(271)	(835)	927
Plain Vanilla Financial Instruments [Member]
Credit adjustments [Abstract]
Structured Notes Balance Net Of DVA	1,146	1,100
Structured Finance [Member]
Credit adjustments [Abstract]
Derivative Credit Risk and Funding Valuation Adjustments	952
Derivative Credit Risk Valuation Adjustment, Derivative Liabilities	1,375	1,712
Credit Valuation Adjustment [Member]
Credit adjustments [Abstract]
Derivative credit adjustments	1,886	2,698	(2,574)
Debit Valuation Adjustment and Funding Valuation Adjustment] [Member]
Credit adjustments [Abstract]
Derivative credit adjustments	(1,152)
Structured note credit adjustments	(760)
Debit valuation adjustment [Member]
Credit adjustments [Abstract]
Derivative credit adjustments	(115)	(590)	538
Structured note credit adjustments	$ (337)	$ (340)	$ 899

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Amount of credit risk valuation adjustment to derivative liabilities to properly reflect the credit quality of the entity, and amount of funding valuation adjustment to properly reflect the funding cost or benefit that a relevant market participant would consider in the transfer of an OTC derivative or structured note.

+ References

No definition available.

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- Definition

This item represents disclosure of all significant concentrations of credit risk arising from structured notes, whether from an individual counterparty or groups of counterparties, net of derivative valuation adjustments.

+ References

No definition available.

+ Details

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

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-Name Accounting Standards Codification

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- Definition

Amount of credit risk valuation adjustment to derivative assets to properly reflect the credit quality of the counterparties.

+ References

No definition available.

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- Definition

Amount of credit risk valuation adjustment to derivative liabilities to properly reflect the credit quality of the entity.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959

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

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-Paragraph 4C

-Subparagraph (a),(c),(d),(e)

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

+ Details

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- Definition

This item represents the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk of liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (d)(1)

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