Noninterest Expense (Details) (USD $) In Millions	3 Months Ended
Mar. 31, 2011	Mar. 31, 2010
Components of noninterest expense [Abstract]
Compensation expense	$ 8,263	$ 7,276
Noncompensation expense:
Occupancy expense	978	869
Technology, communications and equipment expense	1,200	1,137
Professional and outside services	1,735	1,575
Marketing	659	583
Other expense	2,943	4,441
Amortization of intangibles	217	243
Total noncompensation expense	7,732	8,848
Total noninterest expense	$ 15,995	$ 16,124

Components Of Noninterest Expense.

Name:	jpm_ComponentsOfNoninterestExpenseAbstract
Namespace Prefix:	jpm
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Noncompensation expense.

+ Details

Name:	jpm_NoncompensationExpenseAbstract
Namespace Prefix:	jpm
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of costs of a merger or acquisition including compensation, occupancy, communications, technology, legal, accounting, and other costs that were charged to expense during the period.

+ Details

Name:	jpm_NoninterestExpenseOtherThanLaborAndRelatedExpenseTotal
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of net occupancy expense that may include items, such as furniture and fixtures, lease expenses, property taxes and property and casualty insurance expense. Excludes depreciation of equipment.

+ Details

Name:	jpm_OccupancyExpense
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Combination of: 1) Professional and contract service expense includes cost reimbursements for support services related to contracted projects, outsourced management, technical and staff support. 2) This represents the company's cost incurred during an accounting period for managing the money in a fund, which will be billed back to the client and is a component of noninterest expenses. 3) Fees paid to an agent employed by a corporation or mutual fund to maintain shareholder records, including purchases, sales, and account balances. Also includes custodian fees incurred during an accounting period from an agent, bank, trust company, or other organization that holds and safeguards an individual's, mutual fund's, or investment company's assets for them. These fees will be billed back to the client and are a component of noninterest expense. 4) Fees paid by the Entity to sales representatives based on commission payout contracts covering the sale of mutual funds and insurance products. 5) The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees and clearance fees. 6) Sub-advisory fees for mutual funds. Sub-advisory fees that the funds adviser pays for out of the management fee, which it receives from the fund. Funds that are sub-advised report both their management fees and the portion paid to the sub-adviser. The advisers of some mutual funds contract with unaffiliated third-party investment managers for management of all or a portion of their funds portfolios. The third-party manager called a sub-adviser, holds a position equivalent to that of an external investment manager to a pension plan. 7) Consultant, mortgage appraisal fees, credit card processing, credit service and collection agency, data processing and assessments.

+ Details

Name:	jpm_ProfessionalAndOutsideServices
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Combination of: 1)The amount of expense in the period for communications and data processing expense and 2)This element represents equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item excludes furniture expenses.

+ Details

Name:	jpm_TechnologyCommunicationsAndEquipmentExpense
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(2)

+ Details

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including share-based compensation, and pension and other postretirement benefit expense.

+ Details

Name:	us-gaap_LaborAndRelatedExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total expense recognized in the period for promotion, public relations, and brand or product advertising.

+ Details

Name:	us-gaap_MarketingAndAdvertisingExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Total aggregate amount of all noninterest expense.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Chapter V

-Section 563c.102

-Paragraph 14

-Subsection II

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 14

-Article 9

+ Details

Name:	us-gaap_NoninterestExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Other noninterest expenses that are not separately presented in any other noninterest expense category.

+ Details

Name:	us-gaap_OtherNoninterestExpense
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration