Annual report pursuant to Section 13 and 15(d)

Mortgage Servicing Rights - Sensitivity Analysis (Details)

v2.4.0.6
Mortgage Servicing Rights - Sensitivity Analysis (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
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% 639
Change in Fair Value, Impact of 20% 1,375
Change in Fair Value, Impact of 100 bps 375
Change in Fair Value, Impact of 200 bps 782
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% (561)
Change in Fair Value, Impact of 20% (1,056)
Change in Fair Value, Impact of 100 bps (345)
Change in Fair Value, Impact of 200 bps (664)
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 P.29Y
Impact Of 20 Percent Change P.63Y
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.25Y
Impact Of 20 Percent Change P.48Y
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 P.14
Impact Of 20 Percent Change P.31
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.12
Impact Of 20 Percent Change P.23