v2.4.0.6
Derivative Financial Instruments And Hedging Activities (Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations) (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Derivatives $ 22 $ 17 $ 37 $ 19
Amount of Gain(Loss) Recognized in Income on Related Hedged Item 9 35 24 87
Amount of Gain(Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion) 27 [1] 26 [2] 26 [2] (4) [2]
Amount of Gain(Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 17 [1] 47 [1] 34 [1] 97 [1]
Amount of Gain(Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing) 5 [1]   6 [1]  
Eurodollar Futures [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)       1 [2]
Interest Income On Loans [Member] | Eurodollar Futures [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Reclassified from Accumulated OCI into Income (Effective Portion)       (2) [1]
Interest Rate Swaps [Member] | Other Non-Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Derivatives (5) 9 (21) (40)
Amount of Gain(Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing) 5 [1]   6 [1] (1) [1]
Interest Rate Swaps [Member] | Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Derivatives 27 43 58 94
Amount of Gain(Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)       (3) [2]
Amount of Gain(Loss) Reclassified from Accumulated OCI into Income (Effective Portion)       (3) [1]
Interest Rate Swaps [Member] | Interest Income On Loans [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion) 25 [1] 30 [2] 22 [2]  
Amount of Gain(Loss) Reclassified from Accumulated OCI into Income (Effective Portion) 21 [1] 50 [1] 41 [1] 98 [1]
Amount of Gain(Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)       1 [1]
Forward Commitments [Member] | Other Non-Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Derivatives   (35)   (35)
Forward Starting Swaps [Member] | Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion) 2 [1] (4) [2] 4 [2]  
Amount of Gain(Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (4) [1] (3) [1] (7) [1]  
Interest Rate Options [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)       (2) [2]
Interest Rate Options [Member] | Interest Income On Loans [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Reclassified from Accumulated OCI into Income (Effective Portion)       4 [1]
Debt/CDs [Member] | Other Non-Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Related Hedged Item 6 (4) 18 44
Debt/CDs [Member] | Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Related Hedged Item 3 4 6 8
Securities Available For Sale [Member] | Other Non-Interest Expense [Member]
        
Derivative Instruments And Hedging Activities [Line Items]        
Amount of Gain(Loss) Recognized in Income on Related Hedged Item   $ 35   $ 35
[1] Pre-tax
[2] After-tax