Derivatives and Hedging Activities (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Fair values, Volume of activity and gain/loss information related to derivative instruments
Derivative asset designated as hedging instrument	$ 459	$ 458	$ 615
Derivative asset not designated as hedging instrument	1,660	1,846	2,199
Derivative liability designated as hedging instrument	151	257	338
Derivative liability not designated as hedging instrument	1,687	1,850	2,176
Netting adjustments	(1,219)	(1,298)	(1,661)
Netting adjustments	(847)	(965)	(1,193)
Notional Amount, Total	68,119	71,191	94,030
Derivative Assets, Total	900	1,006	1,153
Derivative Liabilities, Total	991	1,142	1,321
Interest rate [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Derivative asset designated as hedging instrument	459	458	601
Derivative asset not designated as hedging instrument	1,149	1,308	1,624
Derivative liability designated as hedging instrument	1	17	4
Derivative liability not designated as hedging instrument	1,180	1,319	1,611
Interest rate [Member] | Designated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	9,713	10,586	14,168
Interest rate [Member] | Nondesignated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	46,355	48,344	65,173
Foreign exchange [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Derivative asset designated as hedging instrument	0	0	14
Derivative asset not designated as hedging instrument	178	180	183
Derivative liability designated as hedging instrument	150	240	334
Derivative liability not designated as hedging instrument	169	164	163
Foreign exchange [Member] | Designated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	1,188	1,093	1,383
Foreign exchange [Member] | Nondesignated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	6,001	5,946	7,617
Energy and commodity [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Derivative asset not designated as hedging instrument	295	318	344
Derivative liability not designated as hedging instrument	303	335	364
Energy and commodity [Member] | Nondesignated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	1,896	1,827	2,031
Credit [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Derivative asset not designated as hedging instrument	34	39	47
Derivative liability not designated as hedging instrument	31	31	37
Credit [Member] | Nondesignated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	2,934	3,375	3,640
Equity [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Derivative asset not designated as hedging instrument	4	1	1
Derivative liability not designated as hedging instrument	4	1	1
Equity [Member] | Nondesignated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	32	20	18
Designated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	10,901	11,679	15,551
Nondesignated [Member]
Fair values, Volume of activity and gain/loss information related to derivative instruments
Notional Amount	$ 57,218	$ 59,512	$ 78,479