Securities - Expected Maturity (Details) - USD ($)
$ in Millions |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 568
|
|
| Due in One Year or Less, Yield |
0.01%
|
|
| Due after One Year through Five Years, Amount |
$ 18,325
|
|
| Due after One Year through Five Years, Yield |
2.30%
|
|
| Due after Five Years through Ten Years, Amount |
$ 62,978
|
|
| Due after Five Years though Ten Years, Yield |
2.50%
|
|
| Due after Ten Years, Amount |
$ 2,754
|
|
| Due after Ten Years, Yield |
2.82%
|
|
| Amortized Cost |
$ 84,625
|
$ 59,766
|
| Total, Yield |
2.45%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Debt Securities Carried at Fair Value |
$ 322,380
|
320,695
|
| Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Due in One Year or Less, Amount |
569
|
|
| Due after One Year through Five Years, Amount |
18,356
|
|
| Due after Five Years though Ten Years, Amount |
62,360
|
|
| Due after Ten Years, Amount |
2,761
|
|
| Held-to-maturity Securities, Fair Value |
84,046
|
$ 59,641
|
| Agency |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 57
|
|
| Due in One Year or Less, Yield |
4.40%
|
|
| Due after One Year through Five Years, Amount |
$ 28,943
|
|
| Due after One Year through Five Years, Yield |
2.40%
|
|
| Due after Five Years though Ten Years, Amount |
$ 197,797
|
|
| Due after Five Years though Ten Years, Yield |
2.80%
|
|
| Due after Ten Years, Amount |
$ 3,050
|
|
| Due after Ten Years, Yield |
2.90%
|
|
| Total, Amount |
$ 229,847
|
|
| Total, Yield |
2.75%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 59
|
|
| Due after One Year through Five Years, Amount |
29,150
|
|
| Due after Five Years though Ten Years, Amount |
196,720
|
|
| Due after Ten Years, Amount |
3,018
|
|
| Debt Securities Carried at Fair Value |
228,947
|
|
| Agency-collateralized mortgage obligations |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 157
|
|
| Due in One Year or Less, Yield |
1.10%
|
|
| Due after One Year through Five Years, Amount |
$ 3,077
|
|
| Due after One Year through Five Years, Yield |
2.20%
|
|
| Due after Five Years though Ten Years, Amount |
$ 7,702
|
|
| Due after Five Years though Ten Years, Yield |
2.80%
|
|
| Due after Ten Years, Amount |
$ 0
|
|
| Due after Ten Years, Yield |
0.00%
|
|
| Total, Amount |
$ 10,936
|
|
| Total, Yield |
2.61%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 157
|
|
| Due after One Year through Five Years, Amount |
3,056
|
|
| Due after Five Years though Ten Years, Amount |
7,779
|
|
| Due after Ten Years, Amount |
0
|
|
| Debt Securities Carried at Fair Value |
10,992
|
|
| Commercial |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 205
|
|
| Due in One Year or Less, Yield |
2.16%
|
|
| Due after One Year through Five Years, Amount |
$ 615
|
|
| Due after One Year through Five Years, Yield |
2.10%
|
|
| Due after Five Years though Ten Years, Amount |
$ 6,356
|
|
| Due after Five Years though Ten Years, Yield |
2.70%
|
|
| Due after Ten Years, Amount |
$ 0
|
|
| Due after Ten Years, Yield |
0.00%
|
|
| Total, Amount |
$ 7,176
|
|
| Total, Yield |
2.63%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 223
|
|
| Due after One Year through Five Years, Amount |
618
|
|
| Due after Five Years though Ten Years, Amount |
6,324
|
|
| Due after Ten Years, Amount |
0
|
|
| Debt Securities Carried at Fair Value |
7,165
|
|
| Non-agency residential |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 320
|
|
| Due in One Year or Less, Yield |
5.00%
|
|
| Due after One Year through Five Years, Amount |
$ 1,123
|
|
| Due after One Year through Five Years, Yield |
4.99%
|
|
| Due after Five Years though Ten Years, Amount |
$ 1,165
|
|
| Due after Five Years though Ten Years, Yield |
4.18%
|
|
| Due after Ten Years, Amount |
$ 3,989
|
|
| Due after Ten Years, Yield |
7.90%
|
|
| Total, Amount |
$ 6,597
|
|
| Total, Yield |
6.60%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 354
|
|
| Due after One Year through Five Years, Amount |
1,102
|
|
| Due after Five Years though Ten Years, Amount |
1,263
|
|
| Due after Ten Years, Amount |
3,950
|
|
| Debt Securities Carried at Fair Value |
6,669
|
|
| Mortgage-backed securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 739
|
|
| Due in One Year or Less, Yield |
3.31%
|
|
| Due after One Year through Five Years, Amount |
$ 33,758
|
|
| Due after One Year through Five Years, Yield |
2.46%
|
|
| Due after Five Years though Ten Years, Amount |
$ 213,020
|
|
| Due after Five Years though Ten Years, Yield |
2.80%
|
|
| Due after Ten Years, Amount |
$ 7,039
|
|
| Due after Ten Years, Yield |
5.73%
|
|
| Total, Amount |
$ 254,556
|
|
| Total, Yield |
3.03%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 793
|
|
| Due after One Year through Five Years, Amount |
33,926
|
|
| Due after Five Years though Ten Years, Amount |
212,086
|
|
| Due after Ten Years, Amount |
6,968
|
|
| Debt Securities Carried at Fair Value |
253,773
|
|
| U.S. Treasury and agency securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 516
|
|
| Due in One Year or Less, Yield |
0.19%
|
|
| Due after One Year through Five Years, Amount |
$ 23,103
|
|
| Due after One Year through Five Years, Yield |
1.70%
|
|
| Due after Five Years though Ten Years, Amount |
$ 1,454
|
|
| Due after Five Years though Ten Years, Yield |
3.14%
|
|
| Due after Ten Years, Amount |
$ 2
|
|
| Due after Ten Years, Yield |
4.57%
|
|
| Total, Amount |
$ 25,075
|
|
| Total, Yield |
1.75%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 516
|
|
| Due after One Year through Five Years, Amount |
23,266
|
|
| Due after Five Years though Ten Years, Amount |
1,493
|
|
| Due after Ten Years, Amount |
2
|
|
| Debt Securities Carried at Fair Value |
25,277
|
|
| Non-U.S. securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 16,707
|
|
| Due in One Year or Less, Yield |
0.82%
|
|
| Due after One Year through Five Years, Amount |
$ 1,864
|
|
| Due after One Year through Five Years, Yield |
3.08%
|
|
| Due after Five Years though Ten Years, Amount |
$ 6
|
|
| Due after Five Years though Ten Years, Yield |
2.79%
|
|
| Total, Amount |
$ 18,577
|
|
| Total, Yield |
1.04%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 16,720
|
|
| Due after One Year through Five Years, Amount |
1,884
|
|
| Due after Five Years though Ten Years, Amount |
6
|
|
| Debt Securities Carried at Fair Value |
18,610
|
|
| Corporate/Agency bonds |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 40
|
|
| Due in One Year or Less, Yield |
3.97%
|
|
| Due after One Year through Five Years, Amount |
$ 69
|
|
| Due after One Year through Five Years, Yield |
4.20%
|
|
| Due after Five Years though Ten Years, Amount |
$ 131
|
|
| Due after Five Years though Ten Years, Yield |
3.41%
|
|
| Due after Ten Years, Amount |
$ 3
|
|
| Due after Ten Years, Yield |
3.67%
|
|
| Total, Amount |
$ 243
|
|
| Total, Yield |
3.93%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 41
|
|
| Due after One Year through Five Years, Amount |
70
|
|
| Due after Five Years though Ten Years, Amount |
128
|
|
| Due after Ten Years, Amount |
4
|
|
| Debt Securities Carried at Fair Value |
243
|
|
| Other taxable securities, substantially all asset-backed securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 2,918
|
|
| Due in One Year or Less, Yield |
1.11%
|
|
| Due after One Year through Five Years, Amount |
$ 4,596
|
|
| Due after One Year through Five Years, Yield |
1.28%
|
|
| Due after Five Years though Ten Years, Amount |
$ 2,268
|
|
| Due after Five Years though Ten Years, Yield |
2.38%
|
|
| Due after Ten Years, Amount |
$ 728
|
|
| Due after Ten Years, Yield |
3.96%
|
|
| Total, Amount |
$ 10,510
|
|
| Total, Yield |
1.67%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 3,102
|
|
| Due after One Year through Five Years, Amount |
4,349
|
|
| Due after Five Years though Ten Years, Amount |
2,296
|
|
| Due after Ten Years, Amount |
722
|
|
| Debt Securities Carried at Fair Value |
10,469
|
|
| Total taxable securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 20,920
|
|
| Due in One Year or Less, Yield |
0.94%
|
|
| Due after One Year through Five Years, Amount |
$ 63,390
|
|
| Due after One Year through Five Years, Yield |
2.13%
|
|
| Due after Five Years though Ten Years, Amount |
$ 216,879
|
|
| Due after Five Years though Ten Years, Yield |
2.81%
|
|
| Due after Ten Years, Amount |
$ 7,772
|
|
| Due after Ten Years, Yield |
5.57%
|
|
| Total, Amount |
$ 308,961
|
|
| Total, Yield |
2.61%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 21,172
|
|
| Due after One Year through Five Years, Amount |
63,495
|
|
| Due after Five Years though Ten Years, Amount |
216,009
|
|
| Due after Ten Years, Amount |
7,696
|
|
| Debt Securities Carried at Fair Value |
308,372
|
|
| Tax-exempt securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 836
|
|
| Due in One Year or Less, Yield |
1.27%
|
|
| Due after One Year through Five Years, Amount |
$ 5,127
|
|
| Due after One Year through Five Years, Yield |
1.31%
|
|
| Due after Five Years though Ten Years, Amount |
$ 5,879
|
|
| Due after Five Years though Ten Years, Yield |
1.35%
|
|
| Due after Ten Years, Amount |
$ 2,136
|
|
| Due after Ten Years, Yield |
1.55%
|
|
| Total, Amount |
$ 13,978
|
|
| Total, Yield |
1.36%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 836
|
|
| Due after One Year through Five Years, Amount |
5,161
|
|
| Due after Five Years though Ten Years, Amount |
5,882
|
|
| Due after Ten Years, Amount |
2,129
|
|
| Debt Securities Carried at Fair Value |
14,008
|
|
| Debt securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 21,756
|
|
| Due in One Year or Less, Yield |
0.95%
|
|
| Due after One Year through Five Years, Amount |
$ 68,517
|
|
| Due after One Year through Five Years, Yield |
2.06%
|
|
| Due after Five Years though Ten Years, Amount |
$ 222,758
|
|
| Due after Five Years though Ten Years, Yield |
2.77%
|
|
| Due after Ten Years, Amount |
$ 9,908
|
|
| Due after Ten Years, Yield |
4.70%
|
|
| Total, Amount |
$ 322,939
|
|
| Total, Yield |
2.56%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 22,008
|
|
| Due after One Year through Five Years, Amount |
68,656
|
|
| Due after Five Years though Ten Years, Amount |
221,891
|
|
| Due after Ten Years, Amount |
9,825
|
|
| Debt Securities Carried at Fair Value |
$ 322,380
|
|