Noninterest Revenue (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Underwriting:
Equity	$ 276	$ 379
Debt	823	982
Total underwriting	1,099	1,361
Advisory	282	432
Total investment banking fees	1,381	1,793
Principal transactions revenue
Trading revenue	2,359	3,940
Private equity gains/(losses)	363	805
Principal transactions	2,722	4,745
Asset management:
Investment management fees	1,446	1,494
All other asset management fees	162	144
Total asset management fees	1,608	1,638
Total administration fees	535	551
Commission and other fees:
Brokerage commissions	655	763
All other commissions and fees	594	654
Total commissions and fees	1,249	1,417
Total asset management, administration and commissions	3,392	3,606
Interest rate
Principal transactions revenue
Trading revenue	1,345	527
Credit
Principal transactions revenue
Trading revenue	(984)	1,248
Foreign exchange
Principal transactions revenue
Trading revenue	548	560
Equity
Principal transactions revenue
Trading revenue	823	1,039
Commodity
Principal transactions revenue
Trading revenue	627	566
Debit Valuation Adjustment [Member]
Principal transactions revenue
Principal transactions	$ (907)	$ (46)

All other asset management fees.

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Combination of: 1) Revenue recognized in the period for (A) performance (incentive) fees based on the investment results achieved for management of certain institutional accounts and hedge funds, (B) schedule-based fees earned for management of mutual funds and closed-end funds, based either on average daily net assets or on a combination of the average daily net assets and gross income, and (C) other investment management and advisory fees. 2) Acting as an agent, a broker-dealer may buy and sell securities on behalf of its customers. In return for such services, the broker-dealer charges a commission. Each time a customer enters into a buy or sell transaction, a commission is earned by the broker-dealer for its selling and administrative efforts. For securities purchased, the commission is recorded as a receivable from customers; for securities sold, it is recorded as reductions in the payable to customers. Commissions earned are usually related to the broker-dealer's customers' trading volume and the dollar amounts of the trades. In general, commissions are for smaller trades of exchange-listed stocks and bonds made by retail customers. 3)Income from services rendered by trust departments or by any consolidated subsidiaries acting in a fiduciary capacity, including fees earned for (A) acting as an agent for fiduciary placement and loans and (B) custody or investment advisory services when such fees are not separately billed to the customer. This item excludes commissions and fees received for the accumulation or disbursement of funds deposited to Individual Retirement or Keogh plan accounts when such are not handled by the reporting entity's trust department. 4) Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products. 5) Revenues from providing transfer agent services to corporations. Such services include maintaining records of investors and account balances and transactions, canceling and issuing certificates, processing investor mailings and dealing with any associated problems (i.e. lost or stolen certificates). 6) Service revenue earned by a depository institution that holds the account balances of other financial institutions and provides services thereto. Such services include check collection and item processing. 7) Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy, such as ADR fees, fund accounting fees, etc.

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The commission a broker-dealer charges when buying and selling securities on behalf of its customers. Acting as an agent, a broker-dealer may buy and sell securities on behalf of its customers. In return for such services, the broker-dealer charges a commission. Each time a customer enters into a buy or sell transaction, a commission is earned by the broker-dealer for its selling and administrative efforts. Commissions earned are usually related to the broker-dealer's customers' trading volume and the dollar amounts of the trades. In general, commissions are for smaller trades of exchange-listed stocks and bonds made by retail customers.

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Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy.

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Aggregate revenue from both affiliated and unaffiliated entities earned during the period from providing administrative services to investment managers or funds seeking to outsource all or part of their mutual fund service functions. Examples of such administrative or support services include the following: legal advice, centralized cash management, filing of reports with the SEC and the IRS, registering of fund shares, corresponding with shareholders, and determination of compliance with various restrictions. An affiliate is a party that, directly or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with the entity.

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