Income Taxes (Net Operating Loss Carry Forwards) (Details) - USD ($) $ in Millions |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Operating Loss Carryforwards [Line Items] | ||
| Temporary differences related to provision for loan losses not expected to reverse therefore not included in deferred tax assets | $ 4 | |
| Operating loss carryforwards, amount subject to annual use limitation | 154 | |
| Total state net operating loss carryforwards | 621 | |
| State deferred tax assets expected to be realized | 11 | |
| Valuation allowance, state | 22 | |
| Federal | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 660 | $ 743 |
| State and Local Jurisdiction | ||
| Operating Loss Carryforwards [Line Items] | ||
| Total state deferred tax asset | $ 33 |