Variable Interest Entities - Consolidated VIE Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	$ 398,981		$ 398,988
Loans	764,185		757,336
Other assets, at fair value	99,796		102,597
Total assets	2,577,148	[1]	2,572,773	[1]	2,476,650
Beneficial interests issued by consolidated VIEs	51,091		52,362
Total liabilities	2,341,284	[1]	2,341,046	[1]
Variable Interest Entity, Primary Beneficiary
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	67,200		68,900
Other assets, at fair value	2,400		1,800
Total assets	77,300		79,800
Beneficial interests issued by consolidated VIEs	51,100		52,400
All other liabilities	900		900
Total liabilities	52,000		53,300
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	34,700		35,400
Variable Interest Entity, Primary Beneficiary | Long-term beneficial interests maturities under 1 year
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	9,000
Variable Interest Entity, Primary Beneficiary | Long-term beneficial interests maturities between 1 and 5 years
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	21,100
Variable Interest Entity, Primary Beneficiary | Long-term beneficial interests maturities over 5 years
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Beneficial interests issued by consolidated VIEs	4,600
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	7,700		9,100
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	47,900		48,300
Other assets, at fair value	800		700
Total assets	48,700		49,000
Beneficial interests issued by consolidated VIEs	31,400		31,200
All other liabilities	0		0
Total liabilities	31,400		31,200
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	16,500		17,700
Other assets, at fair value	0		100
Total assets	16,500		17,800
Beneficial interests issued by consolidated VIEs	11,800		12,000
All other liabilities	0		0
Total liabilities	11,800		12,000
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 bond 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	5,200		5,300
Beneficial interests issued by consolidated VIEs	4,700		4,900
All other liabilities	0		0
Total liabilities	4,700		4,900
Variable Interest Entity, Primary Beneficiary | Municipal bond vehicles | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	5,200		5,300
Variable Interest Entity, Primary Beneficiary | Mortgage securitization entities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	700		700
Other assets, at fair value	100		0
Total assets	2,900		4,000
Beneficial interests issued by consolidated VIEs	1,100		2,100
All other liabilities	800		800
Total liabilities	1,900		2,900
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	2,100		3,300
Variable Interest Entity, Primary Beneficiary | Student loan securitization entities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	2,100		2,200
Other assets, at fair value	100		0
Total assets	2,300		2,400
Beneficial interests issued by consolidated VIEs	2,000		2,100
All other liabilities	0		0
Total liabilities	2,000		2,100
Variable Interest Entity, Primary Beneficiary | Student loan securitization entities | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	100		200
Variable Interest Entity, Primary Beneficiary | Other consumer securitizations
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Loans	0		0
Other assets, at fair value	1,400		1,000
Total assets	1,700		1,300
Beneficial interests issued by consolidated VIEs	100		100
All other liabilities	100		100
Total liabilities	200		200
Variable Interest Entity, Primary Beneficiary | Other consumer securitizations | Debt and equity securities
Information on assets and liabilities related to VIEs that are consolidated by the Firm [Abstract]
Trading assets	$ 300		$ 300

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at March 31, 2015, and December 31, 2014. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.(in millions)Mar 31, 2015 Dec 31, 2014Assets Trading assets$7,703 $9,090Loans67,184 68,880All other assets2,350 1,815Total assets$77,237 $79,785Liabilities Beneficial interests issued by consolidated variable interest entities$51,091 $52,362All other liabilities911 949Total liabilities$52,002 $53,311The 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 March 31, 2015, and December 31, 2014, the Firm provided limited program-wide credit enhancement of $2.0 billion and $2.0 billion, respectively, related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 15.