Variable Interest Entities - Consolidated VIE Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	$ 410,657		$ 374,664
Loans	743,257		738,418
Other assets, at fair value	100,568		110,101
Total assets	2,527,005	[1]	2,415,689	[1]	2,463,309
Beneficial interests issued by consolidated VIEs	47,564		49,617
Total liabilities	2,295,728	[1]	2,204,511	[1]
Variable Interest Entity, Primary Beneficiary
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	66,400		70,100
Other assets, at fair value	1,800		2,200
Total assets	79,200		78,700
Beneficial interests issued by consolidated VIEs	47,600		49,600
Other liabilities	1,000		1,100
Total liabilities	48,600		50,700
Variable Interest Entity, Primary Beneficiary | Long Term Beneficial Interests
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	34,300		31,800
Variable Interest Entity, Primary Beneficiary | Long Term Beneficial Interests Maturities Under One Year
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	8,700
Variable Interest Entity, Primary Beneficiary | Long Term Beneficial Interests Maturities Between One And Five Years
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	18,900
Variable Interest Entity, Primary Beneficiary | Long Term Beneficial Interests Maturities Over Five Years
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	6,700
Variable Interest Entity, Primary Beneficiary | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	11,000		6,400
Variable Interest Entity, Primary Beneficiary | Firm-sponsored credit card trusts
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	47,600		46,900
Other assets, at fair value	700		1,100
Total assets	48,300		48,000
Beneficial interests issued by consolidated VIEs	29,000		26,600
Other liabilities	0		0
Total liabilities	29,000		26,600
Variable Interest Entity, Primary Beneficiary | Firm-sponsored credit card trusts | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	0		0
Variable Interest Entity, Primary Beneficiary | Firm-administered multi-seller conduits
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	15,800		19,000
Other assets, at fair value	0		100
Total assets	15,800		19,100
Beneficial interests issued by consolidated VIEs	8,400		14,900
Other liabilities	0		0
Total liabilities	8,400		14,900
Variable Interest Entity, Primary Beneficiary | Firm-administered multi-seller conduits | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	0		0
Variable Interest Entity, Primary Beneficiary | Municipal bonds vehicles
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	0		0
Other assets, at fair value	0		0
Total assets	5,400		3,400
Beneficial interests issued by consolidated VIEs	4,800		2,900
Other liabilities	0		0
Total liabilities	4,800		2,900
Variable Interest Entity, Primary Beneficiary | Municipal bonds vehicles | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	5,400		3,400
Variable Interest Entity, Primary Beneficiary | Mortgage securitization entities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	800		1,700
Other assets, at fair value	0		0
Total assets	5,400		4,000
Beneficial interests issued by consolidated VIEs	2,700		2,900
Other liabilities	800		900
Total liabilities	3,500		3,800
Variable Interest Entity, Primary Beneficiary | Mortgage securitization entities | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	4,600		2,300
Variable Interest Entity, Primary Beneficiary | Student Loans
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	2,200		2,400
Other assets, at fair value	100		100
Total assets	2,500		2,500
Beneficial interests issued by consolidated VIEs	2,200		2,200
Other liabilities	0		0
Total liabilities	2,200		2,200
Variable Interest Entity, Primary Beneficiary | Student Loans | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	200		0
Variable Interest Entity, Primary Beneficiary | Other
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	0		100
Other assets, at fair value	1,000		900
Total assets	1,800		1,700
Beneficial interests issued by consolidated VIEs	500		100
Other liabilities	200		200
Total liabilities	700		300
Variable Interest Entity, Primary Beneficiary | Other | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	$ 800		$ 700

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at September 30, 2014, and December 31, 2013. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.(in millions)Sep 30, 2014 Dec 31, 2013Assets Trading assets$10,962 $6,366Loans66,413 70,072All other assets1,814 2,168Total assets$79,189 $78,606Liabilities Beneficial interests issued by consolidated variable interest entities$47,564 $49,617All other liabilities958 1,061Total liabilities$48,522 $50,678The 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 September 30, 2014, and December 31, 2013, the Firm provided limited program-wide credit enhancement of $2.0 billion and $2.6 billion, respectively, related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 15.