Variable Interest Entities - Securitization Activity (Details 4) (Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member], USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
All cash flows during the period:
Proceeds from new commercial and other securitizations received as securities	$ 1,900	$ 601	$ 5,000	$ 1,200
Prime [Member]
Securitization activity [Abstract]
Principal securitized	0	0	0	0
All cash flows during the period:
Proceeds from new securitizations	0	0	0	0
Servicing fees collected	109	77	223	241
Purchases of previously transferred financial assets (or the underlying collateral)	36	46	712	146
Cash flows received on the interests that continue to be held by the Firm	51	64	163	216
Subprime [Member]
Securitization activity [Abstract]
Principal securitized	0	0	0	0
All cash flows during the period:
Proceeds from new securitizations	0	0	0	0
Servicing fees collected	22	55	117	154
Purchases of previously transferred financial assets (or the underlying collateral)	1	0	11	6
Cash flows received on the interests that continue to be held by the Firm	4	6	12	18
Option Arms
Securitization activity [Abstract]
Principal securitized	0	0	0	0
All cash flows during the period:
Proceeds from new securitizations	0	0	0	0
Servicing fees collected	33	109	236	344
Purchases of previously transferred financial assets (or the underlying collateral)	0	0	10	0
Cash flows received on the interests that continue to be held by the Firm	1	8	3	19
Commercial mortgage [Member]
Securitization activity [Abstract]
Principal securitized	1,862	574	4,802	1,136
All cash flows during the period:
Proceeds from new securitizations	1,878	601	4,966	1,193
Servicing fees collected	1	1	3	3
Purchases of previously transferred financial assets (or the underlying collateral)	0	0	0	0
Cash flows received on the interests that continue to be held by the Firm	$ 55	$ 38	$ 135	$ 106

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

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- Definition

Proceeds from new commercial and other securitizations received as securities.

+ Details

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- Definition

Securitization activity.

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- Details

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- Definition

Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph h

-Clause 4

-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 FASB

-Name FASB Staff Position (FSP)

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

-Paragraph B11

-Subparagraph a

-Clause 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.

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- Definition

Cash Flows between a transferor and a transferee attributable to purchases of previously transferred financial assets (or its underlying collateral) related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

+ References

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- Definition

Cash flows between transferor and a transferee attributable to the transferor's interests related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor will have continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

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- Definition

Cash Flows between a transferee and a transferor attributable to servicing fees related to a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

+ References

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