Quarterly report pursuant to Section 13 or 15(d)

Mortgage Servicing Rights (Details 2)

v2.4.0.6
Mortgage Servicing Rights (Details 2) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Decrease [Member]
 
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Change in Fair Value, Impact of 10% 501
Change in Fair Value, Impact of 20% 1,071
Change in Fair Value, Impact of 100 bps 256
Change in Fair Value, Impact Of 200 bps 532
Increase [Member]
 
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Change in Fair Value, Impact of 10% (443)
Change in Fair Value, Impact of 20% (838)
Change in Fair Value, Impact of 100 bps (238)
Change in Fair Value, Impact Of 200 bps (459)
Fixed [Member] | Decrease [Member]
 
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Impact of 10 percent change P0.30Y
Impact of 20 percent change P0.65Y
Fixed [Member] | Increase [Member]
 
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Impact of 10 percent change P(0.26)Y
Impact of 20 percent change P(0.49)Y
Adjustable [Member] | Decrease [Member]
 
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Impact of 10 percent change P0.19Y
Impact of 20 percent change P0.41Y
Adjustable [Member] | Increase [Member]
 
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Impact of 10 percent change P(0.16)Y
Impact of 20 percent change P(0.31)Y