Variable Interest Entities (Details 10) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Securitization activity [Abstract]
Pretax gains		22
All cash flows during the period:
Servicing fees collected		$ 1,251
Other cash flows received		5,000
Purchases of previously transferred financial assets (or the underlying collateral)		0
Cash flows received on the interests that continue to be held by the Firm		261
Collateralized Credit Card Securities [Member]
Securitization activity [Abstract]
Principal securitized		26,538	21,390
Pretax gains			151
All cash flows during the period:
Proceeds from new securitizations		26,538	21,389
Servicing fees collected			1,162
Other cash flows received			4,985
Proceeds from collections reinvested in revolving securitizations		161,428	152,399
Cash flows received on the interests that continue to be held by the Firm			117
Key assumptions used to measure retained interests originated during the year (rates per annum):
Prepayment rate		16.70%	19.10%
Weighted-average life (in years)		0.5	0.4
Expected credit losses		8.90%	4.60%
Discount rate		16.00%	12.50%
Option ARMs [Member]
Securitization activity [Abstract]
Principal securitized	0	0
Pretax gains	0	0
All cash flows during the period:
Proceeds from new securitizations	0	0
Servicing fees collected	448	494	129
Other cash flows received	0	0
Proceeds from collections reinvested in revolving securitizations	0	0	0
Purchases of previously transferred financial assets (or the underlying collateral)	1	29	6
Cash flows received on the interests that continue to be held by the Firm	5	38	53
Subprime [Member]
Securitization activity [Abstract]
Principal securitized	0	0
Pretax gains	0	0
All cash flows during the period:
Proceeds from new securitizations	0	0
Servicing fees collected	209	185	146
Other cash flows received	0	4	16
Proceeds from collections reinvested in revolving securitizations	0	0	0
Purchases of previously transferred financial assets (or the underlying collateral)	109	0	13
Cash flows received on the interests that continue to be held by the Firm	26	25	23
Prime [Member]
Securitization activity [Abstract]
Principal securitized	35	0
Pretax gains	0	0
All cash flows during the period:
Proceeds from new securitizations	36	0
Servicing fees collected	311	432	279
Other cash flows received	0	7	23
Proceeds from collections reinvested in revolving securitizations	0	0	0
Purchases of previously transferred financial assets (or the underlying collateral)	211	136	217
Cash flows received on the interests that continue to be held by the Firm	288	475	267
Key assumptions used to measure retained interests originated during the year (rates per annum):
Prepayment rate	0.00%
Weighted-average life (in years)	0
Expected credit losses	0.00%
Discount rate	0.00%
Commercial and other [Member]
Securitization activity [Abstract]
Principal securitized	2,237	500	1,023
Pretax gains	0	0
All cash flows during the period:
Proceeds from new securitizations	2,369	542	989
Servicing fees collected	4	11	11
Other cash flows received	0	0
Proceeds from collections reinvested in revolving securitizations	0	0	0
Purchases of previously transferred financial assets (or the underlying collateral)		0	0
Cash flows received on the interests that continue to be held by the Firm	143	109	455
Key assumptions used to measure retained interests originated during the year (rates per annum):
Prepayment rate	100.00%	100.00%	1.50%
Weighted-average life (in years)	7.1	9.0	2.1
Expected credit losses	0.00%	0.00%	1.50%
Discount rate	7.70%	10.70%	25.00%
Student [Member]
Securitization activity [Abstract]
Principal securitized	0
Pretax gains	0
All cash flows during the period:
Proceeds from new securitizations	0
Servicing fees collected		3	4
Other cash flows received	0
Proceeds from collections reinvested in revolving securitizations		0	0
Purchases of previously transferred financial assets (or the underlying collateral)		0
Cash flows received on the interests that continue to be held by the Firm		7
Auto Loans [Member]
Securitization activity [Abstract]
Principal securitized	0
Pretax gains	0
All cash flows during the period:
Proceeds from new securitizations	0
Servicing fees collected		4	15
Other cash flows received	0
Proceeds from collections reinvested in revolving securitizations		0	0
Purchases of previously transferred financial assets (or the underlying collateral)		249	359
Cash flows received on the interests that continue to be held by the Firm		$ 4	$ 43

Other servicing-related cash flows received, including excess servicing fees and other ancillary fees received from securitization or asset-backed financing arrangement SPE.

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Key assumptions used to measure retained interests originated during the year.

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The principal amount of financial assets transferred during the period in securitizations accounted for as sales.

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Securitization activity.

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The discount rate which is used to value residual cash flows generated by financial assets of the securitization or asset-backed financing arrangement. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, at the time of securitization or asset-backed financing.

+ References

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

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-Name FASB Staff Position (FSP)

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-Paragraph B11

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph h(3)

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The rate at which principal will not be repaid on securitized financial assets. This is used as a key input and assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, at the time of securitization or asset-backed financing.

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Estimated speed of prepayments of principal on financial assets. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, at the time of securitization or asset-backed financing.

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The weighted average life of securitized assets. This is used as a key input and assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, at the time of securitization or asset-backed financing.

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- Definition

This amount represents total cash flows received from retained interests by the transferor other than servicing fees. Other cash flows include, for example, all cash flows from interest-only strips and cash above the minimum required level in cash collateral accounts.

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The amount of proceeds from collections reinvested in previous securitization or asset-backed financing arrangement.

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-Publisher FASB

-Name FASB Staff Position (FSP)

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph h(4)

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- Definition

The amount of proceeds from new securitizations or asset-backed financing arrangements during this reporting period for this class of securitization or asset-backed financing arrangement.

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

-Publisher FASB

-Name FASB Staff Position (FSP)

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-Paragraph B11

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-Name Statement of Financial Accounting Standard (FAS)

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The amount of cash outflow used to purchase previously transferred financial assets (or its underlying collateral), including delinquent or foreclosed assets, from the securitization or asset-backed financing arrangement SPE.

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-Publisher FASB

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The amount of servicing fees from the securitization or asset-backed financing arrangement SPE.

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS140-4 and FIN46(R)-8

-Paragraph B11

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph h(4)

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- Definition

Difference between the sale price and the carrying value when a financial asset transferred in a securitization or asset-backing financing arrangement is accounted for as a sale.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

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-Paragraph B11

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph h(2)

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