Off-Balance Sheet Lending-Related Financial Instruments, Guarantees and Other Commitments - Other Off-Balance Sheet Arrangements (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other off-balance sheet arrangements - supplemental information [Abstract]
Other expense		$ 9,593	$ 11,146	$ 20,398
Allowance for lending-related commitments		148	275
Chase Paymentech Solutions
Other off-balance sheet arrangements - supplemental information [Abstract]
Other expense		12	10	14
Aggregate volume processed by electronic payment services business		949,300	847,900	$ 750,100
Allowance for lending-related commitments		20	4
Cash collateral held		$ 136	$ 174
JPMorgan Chase Financial Company LLC
Other off-balance sheet arrangements - supplemental information [Abstract]
Direct-owned finance subsidiary ownership	100.00%