Variable Interest Entities - Consolidated VIE Assets and Liabilities (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	$ 450,028		$ 443,963
Loans	733,796		723,720
Other assets, at fair value	101,775		104,131
Total assets(a)	2,359,141	[1]	2,265,792	[1]	2,117,605
Beneficial interest liability, at fair value	63,191		65,977
Total liabilities(a)	2,155,072	[1]	2,082,219	[1]
Variable Interest Entity, Primary Beneficiary [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	82,700		86,800
Other assets, at fair value	2,100		2,600
Total assets(a)	96,800		101,500
Beneficial interest liability, at fair value	63,200		66,000
All other liabilities	1,200		1,500
Total liabilities(a)	64,400		67,500
Variable Interest Entity, Primary Beneficiary [Member] | Long Term Beneficial Interests [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interest liability, at fair value	35,000		39,700
Variable Interest Entity, Primary Beneficiary [Member] | Long Term Beneficial Interests Maturities Under One Year [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interest liability, at fair value	11,900
Variable Interest Entity, Primary Beneficiary [Member] | Long Term Beneficial Interests Maturities Between One And Five Years [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interest liability, at fair value	16,000
Variable Interest Entity, Primary Beneficiary [Member] | Long Term Beneficial Interests Maturities Over Five Years [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interest liability, at fair value	7,100
Variable Interest Entity, Primary Beneficiary [Member] | Debt and equity securities [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	12,000		12,100
Variable Interest Entity, Primary Beneficiary [Member] | Firm Sponsored Credit Card Securitization Trusts [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	51,900		50,700
Other assets, at fair value	800		800
Total assets(a)	52,700		51,500
Beneficial interest liability, at fair value	30,100		32,500
All other liabilities	0		0
Total liabilities(a)	30,100		32,500
Variable Interest Entity, Primary Beneficiary [Member] | Firm Sponsored Credit Card Securitization Trusts [Member] | Debt and equity securities [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	0		0
Variable Interest Entity, Primary Beneficiary [Member] | Multi-seller conduits
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	25,400		29,700
Other assets, at fair value	100		200
Total assets(a)	25,500		29,900
Beneficial interest liability, at fair value	17,200		18,700
All other liabilities	0		0
Total liabilities(a)	17,200		18,700
Variable Interest Entity, Primary Beneficiary [Member] | Multi-seller conduits | Debt and equity securities [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	0		0
Variable Interest Entity, Primary Beneficiary [Member] | Municipal Bonds [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	0		0
Other assets, at fair value	100		100
Total assets(a)	9,900		9,300
Beneficial interest liability, at fair value	11,000		9,200
All other liabilities	0		0
Total liabilities(a)	11,000		9,200
Variable Interest Entity, Primary Beneficiary [Member] | Municipal Bonds [Member] | Debt and equity securities [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	9,800		9,200
Variable Interest Entity, Primary Beneficiary [Member] | Mortgage securitization entities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	2,000		2,300
Other assets, at fair value	0		0
Total assets(a)	3,400		3,700
Beneficial interest liability, at fair value	2,300		2,300
All other liabilities	1,100		1,300
Total liabilities(a)	3,400		3,600
Variable Interest Entity, Primary Beneficiary [Member] | Mortgage securitization entities | Debt and equity securities [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	1,400		1,400
Variable Interest Entity, Primary Beneficiary [Member] | Other consumer securitizations
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	3,400		4,100
Other assets, at fair value	1,100		1,500
Total assets(a)	5,300		7,100
Beneficial interest liability, at fair value	2,600		3,300
All other liabilities	100		200
Total liabilities(a)	2,700		3,500
Variable Interest Entity, Primary Beneficiary [Member] | Other consumer securitizations | Debt and equity securities [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	800		1,500
Student Loans [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 3,300		$ 4,100

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at December 31, 2012 and 2011. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.December 31, (in millions)2012 2011Assets Trading assets$11,966 $12,079Loans82,723 86,754All other assets2,090 2,638Total assets$96,779 $101,471Liabilities Beneficial interests issued by consolidated variable interest entities$63,191 $65,977All other liabilities1,244 1,487Total liabilities$64,435 $67,464The assets of the consolidated VIEs are used to settle the liabilities of those entities. The holders of the beneficial interests do not have recourse to the general credit of JPMorgan Chase. At both December 31, 2012 and 2011, the Firm provided limited program-wide credit enhancement of $3.1 billion related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 16 on pages 280–291 of this Annual Report.