XML 23 R67.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurements (Details 4) (Mortgage servicing rights, USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Mortgage servicing rights
 
Estimated change in fair value from adverse changes in significant assumptions  
Impact on fair value of 10% adverse change, Weighted-Average Prepayment Speed $ (54)
Impact on fair value of 20% adverse change, Weighted-Average Prepayment Speed (103)
Impact on fair value of 10% adverse change, Option Adjusted Spread (58)
Impact on fair value of 20% adverse change, Option Adjusted Spread (111)
Impact on fair value of 10% adverse change, Weighted Average Delinquency Rate (23)
Impact on fair value of 20% adverse change, Weighted Average Delinquency Rate $ (46)