The value (monetary amount) of counterclaims that the defendant seeks from the plaintiff in the legal matter.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter, specifically in connection with recoveries.

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Information related to resources or markets associated with a loss contingency. Examples might be the size of a market (value in dollars). A resource can include financial assets or liabilities such as amounts of specific financial instruments or values of client accounts which are in dispute, such as in a litigation matter. The association of the resources or markets with the loss contingency does not imply that the value or size of the resources or markets represents a possible or potential loss.

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The currently claimed estimated value of an aggregate principal amount insured associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The value of interchange fees industry-wide associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The current estimated value of investments in medium-term notes associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The currently estimated value of mortgage-backed securities (“MBS”) offerings associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The current estimated value of annual market size for municipal derivatives associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The currently estimated value of securities issued by securitization trusts associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The currently estimated value of securities purchased in connection with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The value of a financial securitization associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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Number of shares issued and outstanding associated with a loss contingency, during the period described. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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Price per share of shares associated with a loss contingency, during the period described. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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The current estimated value of warrants issued associated with a loss contingency. The association of the line item with the loss contingency does not imply that the line item's value represents a possible or potential loss.

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Number of mortgage loans being sought by the plaintiff in a legal action for repurchase

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Number of causes of action against entity asserted in amended lawsuit complaint.

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Number of causes of action against entity asserted in amended lawsuit complaint that seek to avoid certain transfers made to entity, alleged to have been preferential or fraudulent under federal Bankruptcy Code and New York Debtor and Creditor Law.

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- Definition

Number of consent agreements for settlement, which have been finalized to date with North American Securities Administrators Association ("NASAA") member states.

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- Definition

This concept represents a count of various legal proceedings, including private, civil litigations and regulatory/government investigations.

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Number of offerings of which entity was either issuers or underwriters, related to a suit filed in which the entity is a defendant.

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- Definition

The limited number of tranches of mortgage backed securities in which named plaintiffs purchased that were made available by the court for plaintiffs to pursue asserted claims.

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- Definition

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

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Litigation (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified			9 Months Ended					3 Months Ended		9 Months Ended						9 Months Ended			15 Months Ended		12 Months Ended	9 Months Ended		9 Months Ended											9 Months Ended				9 Months Ended					9 Months Ended						3 Months Ended
	Sep. 30, 2011 New York State Court [Member] Breach of Fiduciary Duty Litigation [Member] actions	Sep. 30, 2011 Federal District Court of New York [Member] Breach of Fiduciary Duty Litigation [Member] actions	Sep. 30, 2011 Western District Court of Washington [Member] Mortgage-Backed Securities Litigation and Regulatory Investigations [Member] tranches actions	Sep. 30, 2011 United States District Court, Southern Disctict of New York [Member] Mortgage Backed Securities Litigation Related to MBS Offerings Sponsored By EMC [Member] actions	Sep. 30, 2011 United States District Court, Southern Disctict of New York [Member] Plaintiff, Federal Housing Finance Administration [Member] actions	Sep. 30, 2011 Minimum [Member] Pending or Threatened Litigation [Member]	Sep. 30, 2011 Maximum [Member] Pending or Threatened Litigation [Member]	Sep. 30, 2011 Pending or Threatened Litigation [Member]	Sep. 30, 2010 Pending or Threatened Litigation [Member]	Sep. 30, 2011 Pending or Threatened Litigation [Member]	Sep. 30, 2010 Pending or Threatened Litigation [Member]	Sep. 30, 2011 Minimum [Member] Auction-Rate Securities Investigations and Litigation [Member]	Sep. 30, 2011 Auction-Rate Securities Investigations and Litigation [Member] agreements	Sep. 30, 2011 Minimum [Member] Bear Stearns Hedge Fund Matters [Member] Plaintiff, Bank of America [Member]	May 31, 2007 Bear Stearns Hedge Fund Matters [Member] Plaintiff, Bank of America [Member]	Sep. 30, 2011 Bear Stearns Hedge Fund Matters, Related to the Feeder Funds actions	Sep. 30, 2011 Maximum [Member] Bear Stearns Hedge Fund Matters, Feeder Funds, Enhanced Leverage Fund [Member]	Sep. 30, 2011 Maximum [Member] Bear Stearns Hedge Fund Matters, feeder funds, High Grade Fund [Member]	Mar. 14, 2008 Minimum [Member] Bear Stearns Shareholder Litigation and Related Matters [Member]	Mar. 14, 2008 Maximum [Member] Bear Stearns Shareholder Litigation and Related Matters [Member]	Dec. 31, 2010 Interchange Litigation [Member]	Sep. 30, 2011 Minimum [Member] Investment Management Litigation [Member]	Sep. 30, 2011 Investment Management Litigation [Member] actions	Sep. 30, 2011 Minimum [Member] Lehman Brothers Bankruptcy Proceedings [Member]	Sep. 30, 2011 Minimum [Member] Lehman Brothers Bankruptcy Proceedings [Member] Plaintiff, Lehman Brothers-related, SIPA Trustee	Sep. 30, 2011 Lehman Brothers Bankruptcy Proceedings [Member]	Sep. 30, 2011 Madoff Litigation [Member] causes	Sep. 30, 2011 Madoff Litigation [Member] Plaintiff, Madoff Litigation-related, liqudation trustee [Member]	Sep. 30, 2011 Madoff Litigation, related to Fairfield [Member]	Sep. 30, 2011 Mortgage-Backed Securities Litigation and Regulatory Investigations [Member] actions	Sep. 30, 2011 Minimum [Member] Mortgage Backed Securities Litigation Related to MBS Offerings Sponsored By EMC [Member] offerings	Sep. 30, 2011 Mortgage Backed Securities Litigation Related to MBS Offerings Sponsored By EMC [Member] actions	Sep. 30, 2011 Mortgage Foreclosure Investigations and Litigation [Member] actions	Sep. 30, 2011 Minimum [Member] Municipal Derivatives Investigations and Litigation [Member]	Sep. 30, 2011 Minimum [Member] Municipal Derivatives Investigations and Litigation [Member] Plaintiff, Municipal Derivatives-related, one insurer [Member]	Sep. 30, 2011 Minimum [Member] Municipal Derivatives Investigations and Litigation [Member] Plaintiff, Municipal Derivatives-related, the other insurer [Member]	Sep. 30, 2011 Maximum [Member] Municipal Derivatives Investigations and Litigation [Member]	Sep. 30, 2011 Maximum [Member] Municipal Derivatives Investigations and Litigation [Member] Plaintiff, Municipal Derivatives-related, one insurer [Member]	Sep. 30, 2010 Municipal Derivatives Investigations and Litigation [Member] Plaintiff, Municipal Derivatives-related, the other insurer [Member]	Sep. 30, 2011 Petters Bankruptcy and Related Matters [Member]	Sep. 30, 2011 Securities Lending Litigation [Member] actions	Sep. 30, 2011 Securities Lending Litigation, related to medium-term notes of Sigma Finance [Member] actions	Sep. 30, 2011 Securities Lending Litigation, related to medium-term notes of Lehman Brothers [Member]	Sep. 30, 2011 Service Members Civil Relief Act and Housing and Economic Recovery Act Investigations and Litigation [Member] Plaintiffs, SCRA and HERA, Borrowers Initially in Class Action [Member]	Sep. 30, 2011 Service Members Civil Relief Act and Housing and Economic Recovery Act Investigations and Litigation [Member] Plaintiffs, SCRA and HERA, Borrowers Subsequently Added to Class Action [Member]	Sep. 30, 2011 Minimum [Member] Washington Mutual Litigations [Member] Plaintiff, Deutsche Bank National Trust Company [Member]	Sep. 30, 2011 Maximum [Member] Washington Mutual Litigations [Member] Plaintiff, Deutsche Bank National Trust Company [Member]	Sep. 30, 2011 Washington Mutual Litigations, in connection with disputed trust securities [Member]	Sep. 30, 2011 Washington Mutual Litigations, in connection with disputed deposit accounts [Member]	Sep. 30, 2011 Plaintiff, National Credit Union Administration [Member] offerings	Sep. 30, 2011 Plaintiff, Federal Housing Finance Administration [Member] actions	Sep. 30, 2011 Minimum [Member] actions
Loss Contingency, Estimate [Abstract]
Loss Contingency, Range of Possible Loss, Portion Not Accrued						$ 0	$ 5,000,000,000
Litigation expense (benefit)								1,300,000,000	1,500,000,000	4,300,000,000	5,200,000,000
Loss Contingency, Information about Litigation Matters [Abstract]
Number of Legal Proceedings	5	1	3	2	4											4							4							3		4	4								4	3									3	10,000
Number of Tranches of Mortgage Backed Securities to Which Asserted Claims Are Limited			13
Number of Offerings by Entity Related to Filed Suit																																																		16
Number of Asserted Causes of Action Against Entity																											28
Number of Asserted Causes of Action Against Entity That Seek to Avoid Transfers to Entity																											20
Number of Finalized Consent Agreements with NASAA Member States													45
Number of Mortgage Loans Sought by Plaintiff for Repurchase																															800
Loss Contingency, Damages Sought, Value												200,000,000		3,000,000,000		700,000,000						1,000,000,000						19,000,000,000							400,000,000											6,000,000,000	10,000,000,000	4,000,000,000	4,000,000,000
Loss Contingency, Damages Sought, Recoveries, Value																										8,600,000,000		425,000,000	150,000,000										4,000,000	450,000,000
Loss Contingency, Damages Sought, Counterclaims, Value																								25,000,000,000
Loss Contingency, Information about related Resources or Markets [Abstract]
Loss Contingency, Insured Aggregate Principal Amount related to, Value																																				378,000,000		1,200,000,000
Loss Contingency, Interchange Fees Industry-Wide related to, Value																					40,000,000,000
Loss Contingency, Investments in Medium-Term Notes related to, Value																																										500,000,000	500,000,000
Loss Contingency, Mortgage-Backed Securities Offerings related to, Value																																3,200,000,000
Loss Contingency, Municipal Derivatives, Annual Market related to, Value																																		100,000,000,000			300,000,000,000
Loss Contingency, Securities Issued by Securitization Trusts related to, Value																														180,000,000,000
Loss Contingency, Securities Purchased in Connection With, Value																														8,000,000,000
Loss Contingency, Securitization related to, Value															4,000,000,000
Loss Contingency, Shares related to, Outstanding																			115	120
Loss Contingency, Shares related to, Price per Share																			$ 30	$ 172.61
Loss Contingency, Warrants Issued related to, Value																																		3,000,000,000
Loss Contingency, Settlement [Abstract]
Litigation Settlement, Gross													$ 25,000,000				$ 18,000,000	$ 19,000,000							$ 800,000,000																			$ 27,000,000	$ 8,000,000