Goodwill and Other Intangible Assets - Key Economic Assumptions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Weighted-average prepayment speed assumption (CPR)	9.80%	8.07%
Impact on fair value of 10% adverse change	$ (337)	$ (362)
Impact on fair value of 20% adverse change	(652)	(705)
Weighted-average option adjusted spread	9.43%jpm_WeightedAverageOptionAdjustedSpread	7.77%jpm_WeightedAverageOptionAdjustedSpread
Impact on fair value of 100 basis points adverse change	(300)	(389)
Impact on fair value of 200 basis points adverse change	$ (578)	$ (750)

Weighted-average option adjusted spread.

No definition available.

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- Definition

Impact on fair value of 100 basis points adverse change in the weighted-average option adjusted spread.

+ References

No definition available.

+ Details

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- Definition

Impact on fair value of 200 basis points adverse change in the weighted-average option adjusted spread.

+ References

No definition available.

+ Details

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- Definition

The hypothetical financial impact of a 10 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719

+ Details

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- Definition

The hypothetical financial impact of a 20 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

+ References

+ Details

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- Definition

A specified percentage variance in the prepayment speed assumption in the determination of fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities).

+ References

+ Details

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