Derivatives and Hedging Activities (Details 3) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Pre-tax net gains (losses) on derivatives not designated as hedging instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	$ 18	$ 22
Interest rate [Member]
Pre-tax net gains (losses) on derivatives not designated as hedging instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	6	7
Foreign exchange [Member]
Pre-tax net gains (losses) on derivatives not designated as hedging instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	20	20
Energy and commodity [Member]
Pre-tax net gains (losses) on derivatives not designated as hedging instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	2	4
Credit [Member]
Pre-tax net gains (losses) on derivatives not designated as hedging instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net, Total	$ (10)	$ (9)