Loans - Credit Card Loans, by Portfolio, by FICO Scores (Details 10c) (Credit Card, Chase Credit Card Portfolio Excluding Washington Mutual [Member])	Mar. 31, 2012	Dec. 31, 2011
Credit Card \| Chase Credit Card Portfolio Excluding Washington Mutual [Member]
Credit Card Loans, by Portfolio Segment [Line Items]
Retained Loans Percentage Fico Score Six Hundred Sixty Or Greater	81.50%	81.40%
Retained Loans Percentage Fico Score Less Than Six Hundred Sixty	18.50%	18.60%

Percentage of recorded investment in retained loans that have estimated refreshed FICO scores equal or greater than 660.

No definition available.

Name:	jpm_RetainedLoansPercentageFicoScoreSixHundredSixtyOrGreater
Namespace Prefix:	jpm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant