Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014 |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | $ 2,272 | $ 1,672 |
Loans held-for-sale | 2,005 | 1,196 |
Loans held-for-investment | 182 | 211 |
Mortgage servicing rights | 317 | 258 |
Derivative assets | 10 | 15 |
Total assets at fair value | 2,187 | 1,407 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (7) | |
Long-term debt | (36) | (84) |
Swap futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 3 | |
Interest rate swaps | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 6 | 6 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (6) | (6) |
Agency | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 907 | 929 |
Agency-collateralized mortgage obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 1,365 | 741 |
Municipal obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | | 2 |
Total Fair Value | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 2,272 | 1,672 |
Loans held-for-sale | 2,053 | 1,196 |
Loans held-for-investment | 5,033 | 3,998 |
Mortgage servicing rights | 317 | 258 |
Other investments | 100 | 100 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (6) | |
Warrant liabilities | (7) | (6) |
Long-term debt | (127) | (172) |
Level 1 | Total Fair Value | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 0 | 0 |
Loans held-for-sale | 0 | 0 |
Loans held-for-investment | 0 | 0 |
Mortgage servicing rights | 0 | 0 |
Other investments | | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | |
Warrant liabilities | 0 | 0 |
Long-term debt | 0 | 0 |
Level 2 | Residential first mortgage loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 41 | |
Level 2 | Total Fair Value | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 2,272 | 1,670 |
Loans held-for-sale | 2,053 | 1,196 |
Loans held-for-investment | | 26 |
Mortgage servicing rights | 0 | 0 |
Other investments | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (6) | |
Warrant liabilities | (7) | (6) |
Long-term debt | (91) | (88) |
Level 3 | Total Fair Value | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 0 | 2 |
Loans held-for-sale | 0 | 0 |
Loans held-for-investment | 4,992 | 3,972 |
Mortgage servicing rights | 317 | 258 |
Other investments | 100 | 100 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | |
Warrant liabilities | 0 | 0 |
Long-term debt | (36) | (84) |
Recurring | Total Fair Value | | |
Assets, Fair Value Disclosure [Abstract] | | |
Mortgage servicing rights | 317 | 258 |
Derivative assets | 56 | 46 |
Other investments | 100 | 100 |
Total assets at fair value | 4,932 | 3,483 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (17) | (20) |
Warrant liabilities | (7) | (6) |
Long-term debt | (36) | (84) |
DOJ litigation settlement | (84) | (82) |
Total liabilities at fair value | (144) | (192) |
Recurring | Total Fair Value | Rate lock commitments | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 33 | 31 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (3) | |
Recurring | Total Fair Value | Swap futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 2 | |
Recurring | Total Fair Value | U.S. Treasury and euro dollar futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 1 | 7 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | | (1) |
Recurring | Total Fair Value | Forward agency and loan sales | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 14 | |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (7) | (13) |
Recurring | Total Fair Value | Mortgage backed securities forwards | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | | 2 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (1) | |
Recurring | Total Fair Value | Interest rate swaps | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 6 | 6 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (6) | (6) |
Recurring | Total Fair Value | Residential first mortgage loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-sale | 2,005 | 1,196 |
Loans held-for-investment | 41 | 26 |
Recurring | Total Fair Value | Second mortgage | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 48 | 53 |
Recurring | Total Fair Value | Agency | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 907 | 929 |
Recurring | Total Fair Value | Agency-collateralized mortgage obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 1,365 | 741 |
Recurring | Total Fair Value | Municipal obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | | 2 |
Recurring | Total Fair Value | HELOC loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 93 | 132 |
Recurring | Level 1 | | |
Assets, Fair Value Disclosure [Abstract] | | |
Mortgage servicing rights | 0 | 0 |
Derivative assets | 1 | 9 |
Other investments | 0 | 0 |
Total assets at fair value | 1 | 9 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (1) | (1) |
Warrant liabilities | 0 | 0 |
Long-term debt | 0 | 0 |
DOJ litigation settlement | 0 | 0 |
Total liabilities at fair value | (1) | (1) |
Recurring | Level 1 | Rate lock commitments | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | |
Recurring | Level 1 | Swap futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | |
Recurring | Level 1 | U.S. Treasury and euro dollar futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 1 | 7 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | | (1) |
Recurring | Level 1 | Forward agency and loan sales | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | 0 |
Recurring | Level 1 | Mortgage backed securities forwards | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | | 2 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (1) | |
Recurring | Level 1 | Interest rate swaps | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | 0 |
Recurring | Level 1 | Residential first mortgage loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-sale | 0 | 0 |
Loans held-for-investment | 0 | 0 |
Recurring | Level 1 | Second mortgage | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 0 | 0 |
Recurring | Level 1 | Agency | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 0 | 0 |
Recurring | Level 1 | Agency-collateralized mortgage obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 0 | 0 |
Recurring | Level 1 | Municipal obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | | 0 |
Recurring | Level 1 | HELOC loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 0 | 0 |
Recurring | Level 2 | | |
Assets, Fair Value Disclosure [Abstract] | | |
Mortgage servicing rights | 0 | 0 |
Derivative assets | 22 | 6 |
Other investments | 0 | 0 |
Total assets at fair value | 4,340 | 2,898 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (13) | (19) |
Warrant liabilities | (7) | (6) |
Long-term debt | 0 | 0 |
DOJ litigation settlement | 0 | 0 |
Total liabilities at fair value | (20) | (25) |
Recurring | Level 2 | Rate lock commitments | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | |
Recurring | Level 2 | Swap futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 2 | |
Recurring | Level 2 | U.S. Treasury and euro dollar futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | | 0 |
Recurring | Level 2 | Forward agency and loan sales | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 14 | |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (7) | (13) |
Recurring | Level 2 | Mortgage backed securities forwards | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | |
Recurring | Level 2 | Interest rate swaps | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 6 | 6 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (6) | (6) |
Recurring | Level 2 | Residential first mortgage loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-sale | 2,005 | 1,196 |
Loans held-for-investment | 41 | 26 |
Recurring | Level 2 | Second mortgage | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 0 | 0 |
Recurring | Level 2 | Agency | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 907 | 929 |
Recurring | Level 2 | Agency-collateralized mortgage obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 1,365 | 741 |
Recurring | Level 2 | Municipal obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | | 0 |
Recurring | Level 2 | HELOC loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 0 | 0 |
Recurring | Level 3 | | |
Assets, Fair Value Disclosure [Abstract] | | |
Mortgage servicing rights | 317 | 258 |
Derivative assets | 33 | 31 |
Other investments | 100 | 100 |
Total assets at fair value | 591 | 576 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (3) | 0 |
Warrant liabilities | 0 | 0 |
Long-term debt | (36) | (84) |
DOJ litigation settlement | (84) | (82) |
Total liabilities at fair value | (123) | (166) |
Recurring | Level 3 | Rate lock commitments | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 33 | 31 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | (3) | |
Recurring | Level 3 | Swap futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | |
Recurring | Level 3 | U.S. Treasury and euro dollar futures | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | | 0 |
Recurring | Level 3 | Forward agency and loan sales | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | 0 |
Recurring | Level 3 | Mortgage backed securities forwards | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | |
Recurring | Level 3 | Interest rate swaps | | |
Assets, Fair Value Disclosure [Abstract] | | |
Derivative assets | 0 | 0 |
Liabilities, Fair Value Disclosure [Abstract] | | |
Derivative liabilities | 0 | 0 |
Recurring | Level 3 | Residential first mortgage loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-sale | 0 | 0 |
Loans held-for-investment | 0 | 0 |
Recurring | Level 3 | Second mortgage | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | 48 | 53 |
Recurring | Level 3 | Agency | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 0 | 0 |
Recurring | Level 3 | Agency-collateralized mortgage obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | 0 | 0 |
Recurring | Level 3 | Municipal obligations | | |
Assets, Fair Value Disclosure [Abstract] | | |
Investment securities | | 2 |
Recurring | Level 3 | HELOC loans | | |
Assets, Fair Value Disclosure [Abstract] | | |
Loans held-for-investment | $ 93 | $ 132 |