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
3 Months Ended
Mar. 31, 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% 650
Change in Fair Value, Impact of 20% 1,387
Change in Fair Value, Impact of 100 bps 435
Change in Fair Value, Impact Of 200 bps 909
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% (577)
Change in Fair Value, Impact of 20% (1,093)
Change in Fair Value, Impact of 100 bps (399)
Change in Fair Value, Impact Of 200 bps (766)
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(0.27)Y
Impact of 20 Percent Change P(0.51)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 P0.21Y
Impact of 20 Percent Change P0.45Y
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(0.18)Y
Impact of 20 Percent Change P(0.34)Y