Derivative Instruments - Credit Derivatives, Protection Sold, Notional and Fair Value (Details 4b) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Protection sold credit derivatives and credit related notes ratings/maturity profile
Protection sold credit derivatives and credit related notes ratings/maturity profile - less than one year	$ (409,397)	$ (324,052)
Protection sold credit derivatives and credit-related notes ratings/maturity profile - from one to five years	(2,108,718)	(1,897,333)
Protection sold credit derivatives and credit-related notes ratings/maturity profile - more than five years	(576,342)	(533,639)
Total notional amount	(3,094,457)	(2,755,024)
Fair value	(77,522)	(77,200)
Noninvestment-grade
Protection sold credit derivatives and credit related notes ratings/maturity profile
Protection sold credit derivatives and credit related notes ratings/maturity profile - less than one year	(190,728)	(148,434)
Protection sold credit derivatives and credit-related notes ratings/maturity profile - from one to five years	(658,364)	(702,638)
Protection sold credit derivatives and credit-related notes ratings/maturity profile - more than five years	(157,522)	(197,330)
Total notional amount	(1,006,614)	(1,048,402)
Fair value	(52,238)	(59,939)
Investment-grade
Protection sold credit derivatives and credit related notes ratings/maturity profile
Protection sold credit derivatives and credit related notes ratings/maturity profile - less than one year	(218,669)	(175,618)
Protection sold credit derivatives and credit-related notes ratings/maturity profile - from one to five years	(1,450,354)	(1,194,695)
Protection sold credit derivatives and credit-related notes ratings/maturity profile - more than five years	(418,820)	(336,309)
Total notional amount	(2,087,843)	(1,706,622)
Fair value	$ (25,284)	$ (17,261)

Protection sold credit derivatives and credit related notes ratings(a)/maturity profile.

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- Definition

Protection sold on credit derivatives and credit-related notes; ratings/maturity profile for maturities for more than five years.

+ Details

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- Definition

Protection sold on credit derivatives and credit-related notes; ratings/maturity profile for maturities from one to five years.

+ Details

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- Definition

Protection sold on credit derivatives and credit- related notes; ratings/maturity profile for maturities less than one year.

+ Details

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- Definition

Discloses the fair value of the credit derivative (or each group of similar credit derivatives) as of the date of the statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708775-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph c
-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.

+ Details

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Balance Type:	credit
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- Definition

Represents the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative or each group of similar credit derivatives before reduction for potential recoveries under recourse or collateralization provisions in the credit derivative.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Credit Derivative
-URI http://asc.fasb.org/extlink&oid=6854095

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708775-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44DD
-Subparagraph b
-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.

+ Details

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Balance Type:	credit
Period Type:	instant