Total cost of shares purchased divided by the total number of shares purchased in a business combination.

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- Definition

Describes the conversion rate at which each outstanding share of the acquired entity's common stock can be used for receiving shares of acquirer's common stock.

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Period Type:	instant

- Definition

The total debt assumed in a business acquisition.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total net assets acquired in a business acquisition.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The number of shares of voting equity interests acquired in the business combination.

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Balance Type:	na
Period Type:	duration

- Definition

Pro forma adjustments to reflect the results of operations of the acquiree, including purchase accounting, valuation and accounting conformity adjustments.

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- Definition

The amount of the excess of the net assets acquired over the cost of the acquired entity in a business combination.

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- Definition

The amount of the excess of the net assets acquired over the cost of the acquired entity in a business combination that was allocated as a pro rata reduction of the amounts that otherwise would have been assigned to acquired assets.

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- Definition

The amount of the excess of the net assets acquired over the cost of the acquired entity in a business combination that was recognized as an extraordinary gain.

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Data Type:	xbrli:monetaryItemType
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- Definition

Business Changes and Developments Numeric.

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- Definition

In a business combination achieved in stages, this element represents the acquisition-date percentage of equity in the acquiree held by the acquirer immediately before the acquisition date.

+ Details

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Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents movements included in the capital surplus section of the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.

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Data Type:	xbrli:monetaryItemType
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- Definition

The percentage of the business retained from a joint venture after its dissolution.

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Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The per share dividend rate in effect before an annouced adjustment.

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount placed in escrow by an equity method investee to cover liabilities related to litigation.

+ Details

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

- Definition

The amount placed in escrow by an equity method investee to cover liabilities related to litigation in conjuction with an equity transaction.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The gain (loss) from the sale of an interest in an investment in an entity in which the reporting entity shares control of the entity with another party or group.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Quantifies the contract amount of the entity's exposure to the variable interest entity.

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Name:	jpm_VariableInterestSubordinatedLoanContractAmount
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of cash paid to acquire the entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(1)

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interests acquired in the business combination.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph c

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Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

In a business combination achieved in stages, this element represents the acquisition-date percentage of equity in the acquiree held by the acquirer immediately before the acquisition date.

+ Details

Name:	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Value of common stock issued to a trust (for example, a 'rabbi trust') set up specifically to accumulate stock for the sole purpose of distribution to participating employees. This trust does not allow employees to immediately or after a holding period diversify into nonemployer securities. The deferred compensation plan for which this trust is set up must be settled by the delivery of a fixed number of shares of employer stock.

+ References

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 97-14

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 32

+ Details

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Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The difference between the book value and the sale price of investments in joint ventures and entities in which the reporting entity has an equity ownership interest, generally of 20 to 50 percent, and exercises significant influence. This element refers to the non cash gain (loss).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the excess of the fair value of acquired net assets over the cost of an acquired business after pro rata reduction of the amounts that otherwise would have been assigned to acquired assets except financial assets other than investments accounted for by the equity method, assets to be disposed of by sale, deferred tax assets, prepaid assets relating to pension and postretirement benefit plans, and other current assets. This amount is considered an extraordinary item and often referred to as negative goodwill. This element is gross of the related tax effect.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 44, 45, 46

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Data Type:	xbrli:monetaryItemType
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- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company before stock transaction.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

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- Definition

Describes disclosure of qualitative and quantitative information about the enterprise's involvement (giving consideration to both explicit arrangements and implicit variable interests) with the VIE, including, but not limited to, the nature, purpose, size, and activities of the VIE, including how the entity is financed. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either (a) does not have equity investors with voting rights or (b) has equity investors that do not provide sufficient financial resources for the entity to support its activities. A VIE often holds financial assets, including loans or receivables, real estate or other property. A VIE may be essentially passive or it may engage in research and development or other activities on behalf of another company.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS140-4 and FIN46(R)-8

-Paragraph C4

-Subparagraph d

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Business Changes and Developments (Details Textuals) (USD $)	12 Months Ended			1 Months Ended			12 Months Ended					12 Months Ended		12 Months Ended			1 Months Ended				12 Months Ended			12 Months Ended
	Dec. 31, 2010	Dec. 31, 2008	Apr. 08, 2008	Dec. 31, 2008 Washington Mutual [Member]	Sep. 25, 2008 Washington Mutual [Member]	Sep. 25, 2008 Washington Mutual [Member] Nonfinancial Assets [Member]	Dec. 31, 2008 Share Exchange Transaction [Member] Bear Stearns [Member]	Dec. 31, 2008 Share Cash Purchase Transaction [Member] Bear Stearns [Member]	Dec. 31, 2008 Bear Stearns [Member]	May 31, 2008 Bear Stearns [Member]	Apr. 08, 2008 Bear Stearns [Member]	Dec. 31, 2008 Bear Stearns [Member] Common stock [Member]	Jun. 30, 2010 RBS Sempra [Member]	Dec. 31, 2010 J.P. Morgan Cazenove [Member]	Dec. 31, 2008 Chase PayMentech Solutions [Member]	Nov. 01, 2008 Chase PayMentech Solutions [Member]	Dec. 31, 2010 Visa [Member]	Dec. 31, 2009 Visa [Member]	Dec. 31, 2008 Visa [Member]	Mar. 28, 2008 Visa [Member]	Dec. 31, 2008 Visa [Member]	Dec. 31, 2009 Highbridge Capital Management [Member]	Jan. 31, 2008 Highbridge Capital Management [Member]	Dec. 31, 2008 Share Cash Purchase Transaction [Member]	Feb. 23, 2009 Common stock [Member]
Business Changes and Developments (Numeric) [Abstract]
Dividend Rate Per Share Before Adjustment																									0.38
Dividends Payable, Amount Per Share																									0.05
Business Acquisition, Cost of Acquired Entity, Cash Paid					$ 1,938,000,000					$ 298,000,000
Business Acquisition, Cost of Acquired Entity, Purchase Price					1,941,000,000					1,496,000,000
Gain on Purchase of Business				1,900,000,000
Business Acquisition, Purchase Price Allocation, Negative Goodwill Recognized As An Extraordinary Gain					2,000,000,000	2,000,000,000
Business Acquisition, Purchase Price Allocation, Negative Goodwill					1,982,000,000
Business Acquisition, Purchase Price Allocation, Negative Goodwill					8,076,000,000
Business Acquisition, Number of Shares Acquired							95,000,000	24,000,000																24,000,000
Percentage of voting equity interests acquired in Bear Stearns			39.50%								39.50%												77.50%
JPMorgan Chase common stock newly issued in acquisition of Bear Stearns									26,473,000			20,700,000
Business Acquisition, Average Cost Per Share Acquired								12.37
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage										0.494
Business Acquisition, Conversion Rate of Acquirer to Acquiree Common Stock										0.21753
Variable Interest Entity, Description of Entity	In conjunction with the Bear Stearns merger, in June 2008, the Federal Reserve Bank of New York ("FRBNY") took control, through an LLC formed for this purpose, of a portfolio of $30.0 billion in assets, based on the value of the portfolio as of March 14, 2008. The assets of the LLC were funded by a $28.85 billion term loan from the FRBNY and a $1.15 billion subordinated loan from JPMorgan Chase.								In conjunction with the Bear Stearns merger, in June 2008, the Federal Reserve Bank of New York ("FRBNY") took control, through an LLC formed for this purpose, of a portfolio of $30 billion in assets, based on the value of the portfolio as of March 14, 2008. The assets of the LLC were funded by a $28.85 billion term loan from the FRBNY and a $1.15 billion subordinated loan from JPMorgan Chase.
Variable Interest Subordinated Loan Contract Amount	1,150,000,000									1,150,000,000
The number of shares of JPMorgan Chase stock exchanged for shares of Bear Stearns stock held in the RSU trust										6,000,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage Acquired										50.60%
Business Acquisition, Pro Forma Adjustments		1,300,000,000
Adjustment to capital surplus resulting from the purchase of the remaining interest in J.P. Morgan Cazenove														1,273,000,000								228,000,000
Net assets of of RBS Sempra Commodities' global oil, global metals and European power and gas businesses acquired by JPMorgan Chase													1,700,000,000
Debt of RBS Sempra Commodities' global oil, global metals and European power and gas businesses acquired by JPMorgan Chase, which was immediately repaid													3,300,000,000
The percentage of the business retained of the Chase Paymentech Solutions joint venture after its dissolution																51.00%
Gain (loss) from Divestiture of Interest in Joint Venture															627,000,000
Sale of Stock, Percentage of Ownership before Transaction																				13.00%
Gain (Loss) on Sale of Equity Method Investments																					1,500,000,000
Equity method investee, amount held in escrow for litigation																				3,000,000,000
Equity method investee, additional amount added to escrow Held For Litigation																	$ 1,300,000,000	$ 700,000,000	$ 1,100,000,000