Noninterest Revenue (Details) (USD $)	12 Months Ended						3 Months Ended	12 Months Ended																			3 Months Ended	6 Months Ended	12 Months Ended								1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Debit valuation adjustment [Member]	Dec. 31, 2012 Debit valuation adjustment [Member]	Dec. 31, 2011 Debit valuation adjustment [Member]	Dec. 31, 2013 Derivative or Structured Note Funding Valuation Adjustment [Member]	Dec. 31, 2013 Commodity [Member]	Dec. 31, 2012 Commodity [Member]	Dec. 31, 2011 Commodity [Member]	Dec. 31, 2013 Interest rate [Member]	Dec. 31, 2012 Interest rate [Member]	Dec. 31, 2011 Interest rate [Member]	Dec. 31, 2013 Credit [Member]	Dec. 31, 2012 Credit [Member]	Dec. 31, 2011 Credit [Member]	Dec. 31, 2013 Foreign exchange [Member]	Dec. 31, 2012 Foreign exchange [Member]	Dec. 31, 2011 Foreign exchange [Member]	Dec. 31, 2013 Equity [Member]	Dec. 31, 2012 Equity [Member]	Dec. 31, 2011 Equity [Member]	Dec. 31, 2013 Commodity [Member]	Dec. 31, 2012 Commodity [Member]	Dec. 31, 2011 Commodity [Member]	Dec. 31, 2012 Federal Reserve Bank of New York [Member]	Sep. 30, 2012 Chief Investment Office [Member] Credit [Member]	Jun. 30, 2012 Chief Investment Office [Member] Credit [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Equity securities [Member]	Dec. 31, 2012 Equity securities [Member]	Dec. 31, 2011 Equity securities [Member]	Dec. 31, 2013 Debt securities [Member]	Dec. 31, 2012 Debt securities [Member]	Dec. 31, 2011 Debt securities [Member]	Dec. 31, 2013 VISA [Member]
Components of investment banking fees [Abstract]
Underwriting	$ 5,036,000,000	$ 4,316,000,000	$ 4,115,000,000																												$ 1,499,000,000	$ 1,026,000,000	$ 1,181,000,000	$ 3,537,000,000	$ 3,290,000,000	$ 2,934,000,000
Advisory	1,318,000,000	1,492,000,000	1,796,000,000
Total investment banking fees	6,354,000,000	5,808,000,000	5,911,000,000
Principal transactions revenue
Trading revenue	9,339,000,000	4,765,000,000	8,898,000,000				(1,500,000,000)				776,000,000	3,922,000,000	(873,000,000)	2,424,000,000	(5,460,000,000)	3,393,000,000	1,540,000,000	1,436,000,000	1,154,000,000	2,526,000,000	2,504,000,000	2,401,000,000	2,073,000,000	2,363,000,000	2,823,000,000		(400,000,000)	(5,800,000,000)
Private equity gains	802,000,000	771,000,000	1,107,000,000
Principal transactions	10,141,000,000	5,536,000,000	10,005,000,000	(452,000,000)	(930,000,000)	1,400,000,000
Pretax gain on expected recovery of subordinated loan																										665,000,000
Gain (losses) related to commodity fair value hedges	331,000,000	(860,000,000)	1,392,000,000					(819,000,000)	(1,399,000,000)	(1,100,000,000)
Asset management:
Investment management fees	8,044,000,000	6,744,000,000	6,449,000,000
All other asset management fees	505,000,000	357,000,000	241,000,000
Asset Management Fees	8,549,000,000	7,101,000,000	6,690,000,000
Total administration fees	2,101,000,000	2,135,000,000	2,171,000,000
Commission and other fees:
Brokerage commissions	2,321,000,000	2,331,000,000	2,753,000,000
All other commissions and fees	2,135,000,000	2,301,000,000	2,480,000,000
Total commissions and fees	4,456,000,000	4,632,000,000	5,233,000,000
Total asset management, administration and commissions	15,106,000,000	13,868,000,000	14,094,000,000
Credit card revenue sharing agreement terms																													3 years	10 years
Operating lease income	1,500,000,000	1,300,000,000	1,200,000,000
Gain (loss) on sale of securities, net																																					$ 1,300,000,000