Allowance for Loan and Lease Losses Allowance for Loan and Lease Losses - Loss Sharing Arrangements (Details) - Loss Sharing Agreement [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Dec. 31, 2014 |
|
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | |||||
Reduction in Charge-offs due to loss sharing agreements | $ 47 | $ 40 | $ 136 | $ 121 | |
Reduction in provision for loan and lease losses | 64 | $ 48 | 183 | $ 130 | |
Expected reimbursement netted in allowance for loan losses | $ 190 | $ 190 | $ 143 |