Variable Interest Entities - Securitization Activity (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Commercial mortgage [Member]
Securitization activity [Abstract]
Principal securitized	$ 11,318	$ 5,421	$ 5,961
All cash flows during the period:
Proceeds from new securitizations	11,507	5,705	6,142
Servicing fees collected	5	4	4
Purchases of previously transferred financial assets (or the underlying collateral)	0	0	0
Cash flows received on the interests that continue to be held by the Firm	325	163	178
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Commercial mortgage [Member]
All cash flows during the period:
Weighted-average life (in years)	8 years 3 months 18 days	8 years 9 months 18 days	1 year 8 months 12 days
Discount rate	3.20%	3.60%	3.50%
Variable Interest Entity (VIE) or Potential VIE, Information Unavailability [Member] \| Residential mortgage-backed securities [Member]
Securitization activity [Abstract]
Principal securitized	1,404	0	0
All cash flows during the period:
Proceeds from new securitizations	1,410	0	0
Servicing fees collected	576	662	755
Purchases of previously transferred financial assets (or the underlying collateral)	294	222	772
Cash flows received on the interests that continue to be held by the Firm	156	185	235
Level 2 [Member] \| Residential mortgage-backed securities [Member]
All cash flows during the period:
Proceeds from new securitizations	1,410
Level 2 [Member] \| Residential and commercial mortgage securitizations [Member]
All cash flows during the period:
Proceeds from new securitizations	11,300		4,000
Level 3 [Member] \| Residential and commercial mortgage securitizations [Member]
All cash flows during the period:
Proceeds from new securitizations		5,700	2,100
Cash [Member] \| Level 2 [Member] \| Commercial mortgage [Member]
All cash flows during the period:
Proceeds from new securitizations	$ 207

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

No definition available.

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- Definition

Discount rate which is used to value residual cash flows generated by financial assets of the securitization, asset-backed financing arrangement, or similar transfer for initial fair value measurement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

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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 Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph d

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

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- Definition

Weighted average life of securitized assets for initial fair value measurement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107207-111719

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