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Mortgage Servicing Rights - Sensitivity Impacts (Details)

v3.5.0.2
Mortgage Servicing Rights - Sensitivity Impacts (Details)
$ in Millions
6 Months Ended
Jun. 30, 2016
USD ($)
Prepayment rates  
Impact of 10% decrease $ 175
Impact of 20% decrease 377
Impact of 10% increase (152)
Impact of 20% increase (286)
OAS level  
Impact of 100 bps decrease 79
Impact of 200 bps decrease 165
Impact of 100 bps increase (74)
Impact of 200 bps increase $ (142)
Fixed  
Change in Weighted-average Lives  
Impact of 10% decrease 3 months 15 days
Impact of 20% decrease 7 months 17 days
Impact of 10% increase 3 months
Impact of 20% increase 5 months 19 days
Adjustable  
Change in Weighted-average Lives  
Impact of 10% decrease 2 months 23 days
Impact of 20% decrease 5 months 27 days
Impact of 10% increase 2 months 12 days
Impact of 20% increase 4 months 17 days