Business Segments - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 segment
Segment Reporting Information [Line Items]
Number of JPMorgan Chase & Co business segments	4
Asset Management
Segment Reporting Information [Line Items]
Assets under supervision	2,400,000,000,000
Minimum | Commercial Banking
Segment Reporting Information [Line Items]
Client revenue	20,000,000
Maximum | Commercial Banking
Segment Reporting Information [Line Items]
Client revenue	2,000,000,000