Annual report pursuant to Section 13 and 15(d)

Mortgage Servicing Rights - Sensitivity Analysis (Details)

v2.4.0.8
Mortgage Servicing Rights - Sensitivity Analysis (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
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% $ 266
Change in Fair Value, Impact of 20% 558
Change in Fair Value, Impact of 100 bps 268
Change in Fair Value, Impact of 200 bps 561
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% (244)
Change in Fair Value, Impact of 20% (469)
Change in Fair Value, Impact of 100 bps (247)
Change in Fair Value, Impact of 200 bps $ (474)
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% decrease 2 months 26 days
Impact of 20% decrease 6 months 3 days
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% decrease 2 months 19 days
Impact of 20% decrease 5 months 1 day
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% decrease 2 months 12 days
Impact of 20% decrease 5 months 1 day
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% decrease 2 months 1 day
Impact of 20% decrease 3 months 26 days