XML 189 R61.htm IDEA: XBRL DOCUMENT v2.4.0.8
Loan Servicing (Analysis of Activity in Residential Mortgage Servicing Rights) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Loan Servicing [Abstract]    
Carrying value, beginning balance $ 627 $ 563
Additions 192 134
Prepayment speeds 218 12
Weighted Average Oas (44) (36)
Servicing costs (21) (22)
Realization of the expected net servicing cash flows (80) (73)
Carrying value, ending balance 892 578
Gains (losses) on derivative financial instruments used to mitigate the income statement effect of changes in fair value $ (133) $ 99