Business Segments - Narrative (Details) (USD $)			3 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2013 Asset Management [Member]	Dec. 31, 2012 Minimum [Member] Commercial Banking [Member]	Dec. 31, 2012 Maximum [Member] Commercial Banking [Member]
Segment Reporting Information [Line Items]
Number of JPMorgan Chase & Co business segments	4
Client revenue			$ 20,000,000	$ 2,000,000,000
Assets under supervision		$ 2,300,000,000,000