Securities - Expected Maturity (Details) - USD ($)
$ in Millions |
Mar. 31, 2016 |
Dec. 31, 2015 |
| Amortized cost of HTM debt securities |
|
|
| Due in One Year or Less, Amount |
$ 0
|
|
| Due in One Year or Less, Yield |
0.00%
|
|
| Due after One Year through Five Years, Amount |
$ 55,230
|
|
| Due after One Year through Five Years, Yield |
2.20%
|
|
| Due after Five Years through Ten Years, Amount |
$ 42,499
|
|
| Due after Five Years though Ten Years, Yield |
2.55%
|
|
| Due after Ten Years, Amount |
$ 249
|
|
| Due after Ten Years, Yield |
3.37%
|
|
| Amortized Cost |
$ 97,978
|
$ 84,625
|
| Total, Yield |
2.35%
|
|
| Debt securities carried at fair value |
|
|
| Total, Amount |
$ 302,333
|
322,380
|
| Fair value of HTM debt securities |
|
|
| Due in One Year or Less, Amount |
0
|
|
| Due after One Year through Five Years, Amount |
56,007
|
|
| Due after Five Years though Ten Years, Amount |
42,818
|
|
| Due after Ten Years, Amount |
250
|
|
| Total, Amount |
99,075
|
$ 84,046
|
| Agency |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 67
|
|
| Due in One Year or Less, Yield |
4.42%
|
|
| Due after One Year through Five Years, Amount |
$ 117,716
|
|
| Due after One Year through Five Years, Yield |
2.33%
|
|
| Due after Five Years though Ten Years, Amount |
$ 86,773
|
|
| Due after Five Years though Ten Years, Yield |
2.73%
|
|
| Due after Ten Years, Amount |
$ 1
|
|
| Due after Ten Years, Yield |
2.47%
|
|
| Total, Amount |
$ 204,557
|
|
| Total, Yield |
2.50%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 69
|
|
| Due after One Year through Five Years, Amount |
119,639
|
|
| Due after Five Years though Ten Years, Amount |
88,027
|
|
| Due after Ten Years, Amount |
1
|
|
| Total, Amount |
207,736
|
|
| Agency-collateralized mortgage obligations |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 136
|
|
| Due in One Year or Less, Yield |
1.20%
|
|
| Due after One Year through Five Years, Amount |
$ 7,770
|
|
| Due after One Year through Five Years, Yield |
2.50%
|
|
| Due after Five Years though Ten Years, Amount |
$ 2,393
|
|
| Due after Five Years though Ten Years, Yield |
2.71%
|
|
| Due after Ten Years, Amount |
$ 0
|
|
| Due after Ten Years, Yield |
0.00%
|
|
| Total, Amount |
$ 10,299
|
|
| Total, Yield |
2.53%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 136
|
|
| Due after One Year through Five Years, Amount |
7,961
|
|
| Due after Five Years though Ten Years, Amount |
2,467
|
|
| Due after Ten Years, Amount |
0
|
|
| Total, Amount |
10,564
|
|
| Commercial |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 97
|
|
| Due in One Year or Less, Yield |
5.70%
|
|
| Due after One Year through Five Years, Amount |
$ 1,377
|
|
| Due after One Year through Five Years, Yield |
2.20%
|
|
| Due after Five Years though Ten Years, Amount |
$ 8,405
|
|
| Due after Five Years though Ten Years, Yield |
2.51%
|
|
| Due after Ten Years, Amount |
$ 110
|
|
| Due after Ten Years, Yield |
2.67%
|
|
| Total, Amount |
$ 9,989
|
|
| Total, Yield |
2.50%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 97
|
|
| Due after One Year through Five Years, Amount |
1,413
|
|
| Due after Five Years though Ten Years, Amount |
8,613
|
|
| Due after Ten Years, Amount |
110
|
|
| Total, Amount |
10,233
|
|
| Non-agency residential |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 201
|
|
| Due in One Year or Less, Yield |
5.71%
|
|
| Due after One Year through Five Years, Amount |
$ 833
|
|
| Due after One Year through Five Years, Yield |
5.46%
|
|
| Due after Five Years though Ten Years, Amount |
$ 804
|
|
| Due after Five Years though Ten Years, Yield |
5.21%
|
|
| Due after Ten Years, Amount |
$ 3,754
|
|
| Due after Ten Years, Yield |
8.49%
|
|
| Total, Amount |
$ 5,592
|
|
| Total, Yield |
7.47%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 236
|
|
| Due after One Year through Five Years, Amount |
800
|
|
| Due after Five Years though Ten Years, Amount |
888
|
|
| Due after Ten Years, Amount |
3,628
|
|
| Total, Amount |
5,552
|
|
| Total mortgage-backed securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 501
|
|
| Due in One Year or Less, Yield |
4.31%
|
|
| Due after One Year through Five Years, Amount |
$ 127,696
|
|
| Due after One Year through Five Years, Yield |
2.36%
|
|
| Due after Five Years though Ten Years, Amount |
$ 98,375
|
|
| Due after Five Years though Ten Years, Yield |
2.73%
|
|
| Due after Ten Years, Amount |
$ 3,865
|
|
| Due after Ten Years, Yield |
8.32%
|
|
| Total, Amount |
$ 230,437
|
|
| Total, Yield |
2.62%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 538
|
|
| Due after One Year through Five Years, Amount |
129,813
|
|
| Due after Five Years though Ten Years, Amount |
99,995
|
|
| Due after Ten Years, Amount |
3,739
|
|
| Total, Amount |
234,085
|
|
| U.S. Treasury and agency securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 524
|
|
| Due in One Year or Less, Yield |
0.20%
|
|
| Due after One Year through Five Years, Amount |
$ 20,197
|
|
| Due after One Year through Five Years, Yield |
1.64%
|
|
| Due after Five Years though Ten Years, Amount |
$ 1,011
|
|
| Due after Five Years though Ten Years, Yield |
3.46%
|
|
| Due after Ten Years, Amount |
$ 0
|
|
| Due after Ten Years, Yield |
0.00%
|
|
| Total, Amount |
$ 21,732
|
|
| Total, Yield |
1.69%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 523
|
|
| Due after One Year through Five Years, Amount |
20,632
|
|
| Due after Five Years though Ten Years, Amount |
1,061
|
|
| Due after Ten Years, Amount |
0
|
|
| Total, Amount |
22,216
|
|
| Non-U.S. securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 18,680
|
|
| Due in One Year or Less, Yield |
0.90%
|
|
| Due after One Year through Five Years, Amount |
$ 1,919
|
|
| Due after One Year through Five Years, Yield |
2.88%
|
|
| Due after Five Years though Ten Years, Amount |
$ 78
|
|
| Due after Five Years though Ten Years, Yield |
2.05%
|
|
| Due after Ten Years, Amount |
$ 0
|
|
| Due after Ten Years, Yield |
0.00%
|
|
| Total, Amount |
$ 20,677
|
|
| Total, Yield |
1.09%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 18,689
|
|
| Due after One Year through Five Years, Amount |
1,942
|
|
| Due after Five Years though Ten Years, Amount |
77
|
|
| Due after Ten Years, Amount |
0
|
|
| Total, Amount |
20,708
|
|
| Other taxable securities, substantially all asset-backed securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 2,533
|
|
| Due in One Year or Less, Yield |
1.63%
|
|
| Due after One Year through Five Years, Amount |
$ 5,167
|
|
| Due after One Year through Five Years, Yield |
1.45%
|
|
| Due after Five Years though Ten Years, Amount |
$ 2,382
|
|
| Due after Five Years though Ten Years, Yield |
2.68%
|
|
| Due after Ten Years, Amount |
$ 711
|
|
| Due after Ten Years, Yield |
4.35%
|
|
| Total, Amount |
$ 10,793
|
|
| Total, Yield |
1.96%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 2,530
|
|
| Due after One Year through Five Years, Amount |
5,107
|
|
| Due after Five Years though Ten Years, Amount |
2,409
|
|
| Due after Ten Years, Amount |
690
|
|
| Total, Amount |
10,736
|
|
| Total taxable securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 22,238
|
|
| Due in One Year or Less, Yield |
1.04%
|
|
| Due after One Year through Five Years, Amount |
$ 154,979
|
|
| Due after One Year through Five Years, Yield |
2.24%
|
|
| Due after Five Years though Ten Years, Amount |
$ 101,846
|
|
| Due after Five Years though Ten Years, Yield |
2.74%
|
|
| Due after Ten Years, Amount |
$ 4,576
|
|
| Due after Ten Years, Yield |
7.71%
|
|
| Total, Amount |
$ 283,639
|
|
| Total, Yield |
2.41%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 22,280
|
|
| Due after One Year through Five Years, Amount |
157,494
|
|
| Due after Five Years though Ten Years, Amount |
103,542
|
|
| Due after Ten Years, Amount |
4,429
|
|
| Total, Amount |
287,745
|
|
| Tax-exempt securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 1,292
|
|
| Due in One Year or Less, Yield |
0.75%
|
|
| Due after One Year through Five Years, Amount |
$ 5,628
|
|
| Due after One Year through Five Years, Yield |
1.08%
|
|
| Due after Five Years though Ten Years, Amount |
$ 5,636
|
|
| Due after Five Years though Ten Years, Yield |
1.34%
|
|
| Due after Ten Years, Amount |
$ 1,995
|
|
| Due after Ten Years, Yield |
1.06%
|
|
| Total, Amount |
$ 14,551
|
|
| Total, Yield |
1.15%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 1,292
|
|
| Due after One Year through Five Years, Amount |
5,632
|
|
| Due after Five Years though Ten Years, Amount |
5,684
|
|
| Due after Ten Years, Amount |
1,980
|
|
| Total, Amount |
14,588
|
|
| Debt securities |
|
|
| Amortized cost of debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 23,530
|
|
| Due in One Year or Less, Yield |
1.03%
|
|
| Due after One Year through Five Years, Amount |
$ 160,607
|
|
| Due after One Year through Five Years, Yield |
2.20%
|
|
| Due after Five Years though Ten Years, Amount |
$ 107,482
|
|
| Due after Five Years though Ten Years, Yield |
2.66%
|
|
| Due after Ten Years, Amount |
$ 6,571
|
|
| Due after Ten Years, Yield |
5.69%
|
|
| Total, Amount |
$ 298,190
|
|
| Total, Yield |
2.35%
|
|
| Debt securities carried at fair value |
|
|
| Due in One Year or Less, Amount |
$ 23,572
|
|
| Due after One Year through Five Years, Amount |
163,126
|
|
| Due after Five Years though Ten Years, Amount |
109,226
|
|
| Due after Ten Years, Amount |
6,409
|
|
| Total, Amount |
$ 302,333
|
|