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Loans Held for Investment portfolio and Related Allowance for Loan and Lease Losses (Detail) (USD $)
In Millions
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Dec. 31, 2009
Individually evaluated$ 3,906 $ 4,083   
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment479 605   
Collectively evaluated113,117 111,400   
Total evaluated117,023 115,483   
Loans carried at fair value452 492   
Total117,475 115,975   
Individually evaluated479 605   
Collectively evaluated2,121 2,369   
Total evaluated2,600 2,974   
Total LHFI2,6002,7442,9743,0863,1563,120
Commercial Portfolio Segment
      
Individually evaluated711 906   
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment79 175   
Collectively evaluated53,991 52,578   
Total evaluated54,702 53,484   
Loans carried at fair value3 4   
Total54,705 53,488   
Individually evaluated79 175   
Collectively evaluated1,022 1,128   
Total evaluated1,101 1,303   
Total LHFI1,1011,2001,3031,4021,4471,353
Residential Mortgage Loans
      
Individually evaluated3,183 3,166   
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment398 428   
Collectively evaluated41,360 42,867   
Total evaluated44,543 46,033   
Loans carried at fair value449 488   
Total44,992 46,521   
Individually evaluated398 428   
Collectively evaluated954 1,070   
Total evaluated1,352 1,498   
Total LHFI1,3521,3951,4981,5021,5381,592
Consumer Portfolio Segment
      
Individually evaluated12 11   
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment2 2   
Collectively evaluated17,766 15,955   
Total evaluated17,778 15,966   
Loans carried at fair value0 0   
Total17,778 15,966   
Individually evaluated2 2   
Collectively evaluated145 171   
Total evaluated147 173   
Total LHFI$ 147$ 149$ 173$ 182$ 171$ 175