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Loan Servicing (Tables)
6 Months Ended
Jun. 30, 2011
Loan Servicing  
Summary of Residential Mortgage Loans Managed or Securitized and Related Delinquencies and Net Charge-Offs
Schedule of Residential Mortgage Servicing Assets
Schedule of Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets, or Servicing Liabilities [Text Block]
     Residential
Mortgage Servicing Rights
June 30, 2011
 
     (Dollars in millions)  

Fair value of residential mortgage servicing rights

   $ 879  

Composition of residential loans serviced for others:

  

Fixed-rate mortgage loans

     99

Adjustable-rate mortgage loans

     1  
  

 

 

 

Total

     100
  

 

 

 

Weighted average life

     5.9  yrs 

Prepayment speed

     11.7

Effect on fair value of a 10% increase

   $ (37

Effect on fair value of a 20% increase

     (70

Weighted average discount rate

     10.3

Effect on fair value of a 10% increase

   $ (36

Effect on fair value of a 20% increase

     (68
Schedule of Commercial Mortgage Servicing Rights
     Commercial Mortgage Servicing Rights
Six Months Ended
June 30,
 
     2011     2010  
     (Dollars in millions)  

Carrying value, January 1,

   $ 103     $ 101  

Additions

     15       8  

Amortization expense

     (11     (9
  

 

 

   

 

 

 

Carrying value, June 30,

   $ 107     $ 100  
  

 

 

   

 

 

 
Schedule of Commercial Mortgage Servicing Rights Sensitivity
     Commercial Mortgage
Servicing Rights
June 30, 2011
 
     (Dollars in millions)  

Fair value of commercial mortgage servicing rights

   $ 124   

Weighted average life

     7.1 yrs 

Prepayment speed

     0.0

Weighted average discount rate

     12.3

Effect on fair value of a 10% increase

   $ (4

Effect on fair value of a 20% increase

     (8