Variable Interest Entities - Securitization Activity (Details 4) (USD $) In Millions	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member]
All cash flows during the period:
Proceeds from new commercial and other securitizations received as securities	$ 1,500	$ 592	$ 3,100	$ 592
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Prime [Member]
Securitization activity [Abstract]
Principal securitized	0	0	0
All cash flows during the period:
Proceeds from new securitizations	0		0
Servicing fees collected	50	89	114	164
Purchases of previously transferred financial assets (or the underlying collateral)	297	52	676	100
Cash flows received on the interests that continue to be held by the Firm	58	73	122	153
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Subprime [Member]
Securitization activity [Abstract]
Principal securitized	0	0	0
All cash flows during the period:
Proceeds from new securitizations	0		0
Servicing fees collected	36	53	95	99
Purchases of previously transferred financial assets (or the underlying collateral)	4	6	10	6
Cash flows received on the interests that continue to be held by the Firm	4	9	8	19
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Option Arms
Securitization activity [Abstract]
Principal securitized	0	0	0
All cash flows during the period:
Proceeds from new securitizations	0		0
Servicing fees collected	100	118	203	235
Purchases of previously transferred financial assets (or the underlying collateral)	4	0	10	0
Cash flows received on the interests that continue to be held by the Firm	1	6	2	12
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Commercial mortgage [Member]
Securitization activity [Abstract]
Principal securitized	1,447	562	2,940
All cash flows during the period:
Proceeds from new securitizations	1,530		3,088
Servicing fees collected	1	1	2	2
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	37	30	81	68
Prime [Member]
Securitization activity [Abstract]
Principal securitized				0
Subprime [Member]
Securitization activity [Abstract]
Principal securitized				0
Option Arms
Securitization activity [Abstract]
Principal securitized				0
Commercial mortgage [Member]
Securitization activity [Abstract]
Principal securitized				562
All cash flows during the period:
Proceeds from new securitizations		$ 592		$ 592

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.

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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).

+ References

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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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