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
9 Months Ended
Sep. 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% 496
Change in Fair Value, Impact of 20% 1,063
Change in Fair Value, Impact of 100 bps 230
Change in Fair Value, Impact Of 200 bps 479
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% (438)
Change in Fair Value, Impact of 20% (826)
Change in Fair Value, Impact of 100 bps (214)
Change in Fair Value, Impact Of 200 bps (413)
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 P0.31Y
Impact of 20 percent change P0.66Y
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(0.27)Y
Impact of 20 percent change P(0.50)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 P0.42Y
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(0.17)Y
Impact of 20 percent change P(0.31)Y