Regulatory Matters (Details) - USD ($)
$ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
|
|
| Tangible capital (to tangible assets), Actual, Amount |
$ 1,225
|
$ 1,435
|
| Tangible capital (to tangible assets), Actual, Ratio |
8.88%
|
11.51%
|
| Tier 1 capital (to adjusted tangible assets), Actual, Amount |
$ 1,225
|
$ 1,435
|
| Tier 1 capital (to adjusted tangible assets), Actual, Ratio (as a percent) |
8.88%
|
11.51%
|
| Tier 1 capital (to adjusted tangible assets), For Capital Adequacy Purposes, Amount |
$ 552
|
$ 499
|
| Tier 1 capital (to adjusted tangible assets), For Required Adequacy Purposes, Ratio (as a percent) |
4.00%
|
4.00%
|
| Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount |
$ 690
|
$ 624
|
| Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent) |
5.00%
|
5.00%
|
| Common equity Tier 1 capital (to RWA), Actual, Amount |
$ 1,056
|
$ 1,065
|
| Common equity Tier 1 capital (to RWA), Actual, Ratio (as a percent) |
12.04%
|
14.09%
|
| Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Amount |
$ 395
|
$ 340
|
| Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Ratio (as a percent) |
4.50%
|
4.50%
|
| Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Amount |
$ 570
|
$ 491
|
| Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Ratio (as a percent) |
6.50%
|
6.50%
|
| Tier 1 capital (to risk-weighted assets), Actual, Amount |
$ 1,225
|
$ 1,435
|
| Tier 1 capital (to risk-weighted assets), Actual, Ratio (as a percent) |
13.98%
|
18.98%
|
| Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount |
$ 526
|
$ 454
|
| Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent) |
6.00%
|
6.00%
|
| Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount |
$ 701
|
$ 605
|
| Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent) |
8.00%
|
8.00%
|
| Total capital (to risk-weighted assets), Actual, Amount |
$ 1,338
|
$ 1,534
|
| Total capital (to risk-weighted assets), Actual, Ratio (as a percent) |
15.26%
|
20.28%
|
| Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount |
$ 701
|
$ 605
|
| Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent) |
8.00%
|
8.00%
|
| Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount |
$ 877
|
$ 756
|
| Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent) |
10.00%
|
10.00%
|
| Bank |
|
|
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |
|
|
| Tangible capital (to tangible assets), Actual, Amount |
$ 1,459
|
$ 1,472
|
| Tangible capital (to tangible assets), Actual, Ratio |
10.55%
|
11.79%
|
| Tier 1 capital (to adjusted tangible assets), Actual, Amount |
$ 1,459
|
$ 1,472
|
| Tier 1 capital (to adjusted tangible assets), Actual, Ratio (as a percent) |
10.55%
|
11.79%
|
| Tier 1 capital (to adjusted tangible assets), For Capital Adequacy Purposes, Amount |
$ 553
|
$ 500
|
| Tier 1 capital (to adjusted tangible assets), For Required Adequacy Purposes, Ratio (as a percent) |
4.00%
|
4.00%
|
| Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount |
$ 691
|
$ 625
|
| Tier 1 capital (to adjusted tangible assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent) |
5.00%
|
5.00%
|
| Common equity Tier 1 capital (to RWA), Actual, Amount |
$ 1,459
|
$ 1,472
|
| Common equity Tier 1 capital (to RWA), Actual, Ratio (as a percent) |
16.59%
|
19.42%
|
| Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Amount |
$ 396
|
$ 341
|
| Common equity Tier 1 capital (to RWA), Required for Capital Adequacy, Ratio (as a percent) |
4.50%
|
4.50%
|
| Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Amount |
$ 572
|
$ 493
|
| Common equity Tier 1 capital (to RWA), Required to Be Well Capitalized, Ratio (as a percent) |
6.50%
|
6.50%
|
| Tier 1 capital (to risk-weighted assets), Actual, Amount |
$ 1,459
|
$ 1,472
|
| Tier 1 capital (to risk-weighted assets), Actual, Ratio (as a percent) |
16.59%
|
19.42%
|
| Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount |
$ 528
|
$ 455
|
| Tier 1 capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent) |
6.00%
|
6.00%
|
| Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount |
$ 704
|
$ 607
|
| Tier 1 capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent) |
8.00%
|
8.00%
|
| Total capital (to risk-weighted assets), Actual, Amount |
$ 1,571
|
$ 1,570
|
| Total capital (to risk-weighted assets), Actual, Ratio (as a percent) |
17.87%
|
20.71%
|
| Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Amount |
$ 704
|
$ 607
|
| Total capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio (as a percent) |
8.00%
|
8.00%
|
| Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Amount |
$ 879
|
$ 758
|
| Total capital (to risk-weighted assets), Well Capitalized Under Prompt Corrective Action Provisions, Ratio (as a percent) |
10.00%
|
10.00%
|