Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Accumulated other comprehensive income (loss) |
|
|
| Beginning balance |
$ 1,529
|
$ 1,373
|
| Ending balance |
1,286
|
1,504
|
| Accumulated Other Comprehensive Income (Loss) |
|
|
| Accumulated other comprehensive income (loss) |
|
|
| Beginning balance |
2
|
8
|
| Net unrealized loss, net of tax |
(27)
|
4
|
| Reclassifications out of AOCI |
5
|
|
| Transfer of net unrealized loss from AFS to HTM |
|
0
|
| Ending balance |
(20)
|
12
|
| Securities | Held-to-Maturity Securities |
|
|
| Accumulated other comprehensive income (loss) |
|
|
| Beginning balance |
5
|
0
|
| Net unrealized loss, net of tax |
0
|
0
|
| Reclassifications out of AOCI |
(1)
|
|
| Transfer of net unrealized loss from AFS to HTM |
|
5
|
| Ending balance |
4
|
5
|
| Securities | Available-for-Sale Securities |
|
|
| Accumulated other comprehensive income (loss) |
|
|
| Beginning balance |
0
|
8
|
| Net unrealized loss, net of tax |
17
|
9
|
| Reclassifications out of AOCI |
(4)
|
|
| Transfer of net unrealized loss from AFS to HTM |
|
(5)
|
| Ending balance |
13
|
12
|
| Cash Flow Hedges |
|
|
| Accumulated other comprehensive income (loss) |
|
|
| Beginning balance |
(3)
|
0
|
| Net unrealized loss, net of tax |
(44)
|
(5)
|
| Reclassifications out of AOCI |
10
|
|
| Transfer of net unrealized loss from AFS to HTM |
|
0
|
| Ending balance |
$ (37)
|
$ (5)
|