v2.4.0.6
Derivatives, Net Gains (Losses) in Income related to Derivatives Not Designated as Hedging Instruments (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Net gains recognized related to derivatives not designated as hedging instruments $ 5,414 $ 5,418
Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 5,278 3,900
Free standing derivatives (economic hedges) [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 136 1,518
Foreign Exchange Contract [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 698 565
Foreign Exchange Contract [Member] | Free standing derivatives (economic hedges) [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 70 103
Equity Contract [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 769 441
Equity Contract [Member] | Free standing derivatives (economic hedges) [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments (5) 0
Commodity Contract [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 124 65
Other Contract [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments (5) 10
Credit Contract [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments (200) (710)
Credit Contract [Member] | Free standing derivatives (economic hedges) [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments (18) (174)
Interest Rate Contracts Recognized In Noninterest Income Other [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 298 224
Interest Rate Contracts Recognized In Noninterest Income Other [Member] | Free standing derivatives (economic hedges) [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments (157) (22)
Interest Rate Contracts Recognized In Noninterest Income Mortgage Banking [Member] | Customer accommodation trading and other free standing derivatives [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments 3,594 3,305
Interest Rate Contracts Recognized In Noninterest Income Mortgage Banking [Member] | Free standing derivatives (economic hedges) [Member]
    
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]    
Gain (Loss) on Derivative Instruments $ 246 $ 1,611