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Mortgage Servicing Rights - Sensitivity Impacts (Details)

v3.4.0.3
Mortgage Servicing Rights - Sensitivity Impacts (Details)
$ in Millions
3 Months Ended
Mar. 31, 2016
USD ($)
Prepayment rates  
Impact of 10% decrease $ 183
Impact of 20% decrease 394
Impact of 10% increase (161)
Impact of 20% increase (304)
OAS level  
Impact of 100 bps decrease 98
Impact of 200 bps decrease 203
Impact of 100 bps increase (90)
Impact of 200 bps increase $ (174)
Fixed  
Change in Weighted-average Lives  
Impact of 10% decrease 3 months 18 days
Impact of 20% decrease 7 months 20 days
Impact of 10% increase 3 months 3 days
Impact of 20% increase 5 months 23 days
Adjustable  
Change in Weighted-average Lives  
Impact of 10% decrease 2 months 26 days
Impact of 20% decrease 6 months 7 days
Impact of 10% increase 2 months 15 days
Impact of 20% increase 4 months 24 days