Loans Held-for-Investment (Details) - USD ($)
$ in Millions |
Jun. 30, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
$ 5,822
|
$ 6,352
|
$ 4,448
|
| Residential first mortgage |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
2,075
|
3,100
|
2,193
|
| Second mortgage |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
127
|
135
|
149
|
| HELOC |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
346
|
384
|
257
|
| Other |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
32
|
31
|
31
|
| Total consumer loans |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
2,580
|
3,650
|
2,630
|
| Commercial real estate |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
976
|
814
|
620
|
| Commercial real estate | Commercial Borrower |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
221
|
188
|
|
| Commercial and industrial |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
615
|
552
|
429
|
| Warehouse lending |
|
|
|
| Loans and Leases Receivable, Net Amount [Abstract] |
|
|
|
| Loans held-for-investment |
$ 1,651
|
$ 1,336
|
$ 769
|