Securities Financing Activities (Details) (USD $)	Mar. 31, 2011	Dec. 31, 2010
Components of collateralized financings [Abstract]
Securities purchased under resale agreements	$ 216,988,000,000	$ 222,302,000,000
Securities borrowed	119,000,000,000	123,587,000,000
Securities sold under repurchase agreements	259,147,000,000	262,722,000,000
Securities loaned	23,124,000,000	10,592,000,000
Securities financing activities (Numeric) [Abstract]
Federal funds sold and securities purchased under resale agreements (included $20.0 and $20.3 at fair value)	217,356,000,000	222,554,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements (included $6.2 and $4.1 at fair value)	285,444,000,000	276,644,000,000
Resale and repurchase agreements that have been netted	125,300,000,000	112,700,000,000
Fair value [Member]
Components of collateralized financings [Abstract]
Securities borrowed	15,334,000,000	13,961,000,000
Securities financing activities (Numeric) [Abstract]
Federal funds sold and securities purchased under resale agreements (included $20.0 and $20.3 at fair value)	19,998,000,000	20,299,000,000
Federal funds purchased and securities loaned or sold under repurchase agreements (included $6.2 and $4.1 at fair value)	$ 6,214,000,000	$ 4,060,000,000

This is the carrying value as of the balance sheet date of securities resale and securities repurchase ageements with the same counterpay that have been netted.

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- Definition

Total federal funds purchased and securities loaned or sold under repurchase agreements classified as (1) Federal funds purchased and securities sold under agreements to repurchase and (2) Securities loaned. (1) The amount shown on the books that a bank with insufficient reserves borrows, at the federal funds rate, from another bank to meet its reserve requirements and the amount of securities that an institution sells and agrees to repurchase at a specified date for a specified price, net of any reductions or offsets. (2) The carrying value as of the balance sheet date of securities loaned to other broker dealers, typically used by such parties to cover short sales, secured by cash or other securities furnished by such parties until the borrowing is closed.

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- Definition

Includes: (1) the amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements (Federal Funds Sold) and (2) the dollar amount outstanding of funds lent in the form of security resale agreements regardless of maturity, if the agreement requires the bank to resell the identical security purchased or a security that meets the definition of substantially the same in the case of a dollar roll. Also include purchases of participations in pools of securities, regardless of maturity (Securities Purchased Under Agreements to Re-sell).

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Chapter V

-Section 563c.102

-Subsection I

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph m

-Subparagraph 1(i)

-Article 4

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- Definition

The carrying value as of the balance sheet date of securities borrowed from broker-dealers or institutions (a) to deliver them in place of securities not available because of short-sales or late or ineffective deliveries; (b) to lend them in connection with finder or conduit transactions; and (c) to be used for other purposes permitted under federal regulations.

+ References

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-BRD

-Chapter 7

-Paragraph 30, 31, 32, 33

-IssueDate 2006-05-01

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17, 93

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- Definition

The carrying value as of the balance sheet date of securities loaned to other broker dealers, typically used by such parties to cover short sales, secured by cash or other securities furnished by such parties until the borrowing is closed.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph a

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-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-BRD

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-Paragraph 32

-IssueDate 2006-05-01

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-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 91, 93

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- Definition

The carrying value of funds outstanding loaned in the form of security resale agreements if the agreement requires the purchaser to resell the identical security purchased or a security that meets the definition of "substantially the same" in the case of a dollar roll. Also includes purchases of participations in pools of securities that are subject to a resale agreement.

+ References

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

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 41

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 100

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Article 9

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-Number 210

-Section 08

-Paragraph m

-Subparagraph 1(i)

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-Section 08

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- Definition

The carrying value as of the balance sheet date of securities that an institution sells and agrees to repurchase (the identical or substantially the same securities) as a seller-borrower at a specified date for a specified price, also known as a repurchase agreement, or repo. Most repos involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit, are sometimes used in repos.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Subparagraph 1

-Article 9

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-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 100

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-Name Audit and Accounting Guide (AAG)

-Number AAG-BRD

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-Paragraph 36

-IssueDate 2006-05-01

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