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 |
$ 0
|
|
| Due in One Year or Less, Yield |
0.00%
|
|
| Due after One Year through Five Years, Amount |
$ 15
|
|
| Due after One Year through Five Years, Yield |
3.36%
|
|
| Due after Five Years through Ten Years, Amount |
$ 87
|
|
| Due after Five Years though Ten Years, Yield |
2.31%
|
|
| Due after Ten Years, Amount |
$ 84,406
|
|
| Due after Ten Years, Yield |
3.08%
|
|
| Amortized Cost |
$ 84,508
|
$ 59,757
|
| Total, Yield |
3.08%
|
|
| 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 |
0
|
|
| Due after One Year through Five Years, Amount |
15
|
|
| Due after Five Years though Ten Years, Amount |
87
|
|
| Due after Ten Years, Amount |
83,944
|
|
| 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 |
$ 1
|
|
| Due in One Year or Less, Yield |
5.67%
|
|
| Due after One Year through Five Years, Amount |
$ 216
|
|
| Due after One Year through Five Years, Yield |
3.03%
|
|
| Due after Five Years though Ten Years, Amount |
$ 549
|
|
| Due after Five Years though Ten Years, Yield |
2.50%
|
|
| Due after Ten Years, Amount |
$ 228,590
|
|
| Due after Ten Years, Yield |
3.28%
|
|
| Total, Amount |
$ 229,356
|
|
| Total, Yield |
3.28%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 1
|
|
| Due after One Year through Five Years, Amount |
150
|
|
| Due after Five Years though Ten Years, Amount |
555
|
|
| Due after Ten Years, Amount |
228,241
|
|
| 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 |
$ 0
|
|
| Due in One Year or Less, Yield |
0.00%
|
|
| Due after One Year through Five Years, Amount |
$ 0
|
|
| Due after One Year through Five Years, Yield |
0.00%
|
|
| Due after Five Years though Ten Years, Amount |
$ 0
|
|
| Due after Five Years though Ten Years, Yield |
0.00%
|
|
| Due after Ten Years, Amount |
$ 10,898
|
|
| Due after Ten Years, Yield |
3.15%
|
|
| Total, Amount |
$ 10,898
|
|
| Total, Yield |
3.15%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 0
|
|
| Due after One Year through Five Years, Amount |
0
|
|
| Due after Five Years though Ten Years, Amount |
0
|
|
| Due after Ten Years, Amount |
10,992
|
|
| 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 |
$ 48
|
|
| Due in One Year or Less, Yield |
8.60%
|
|
| Due after One Year through Five Years, Amount |
$ 322
|
|
| Due after One Year through Five Years, Yield |
1.90%
|
|
| Due after Five Years though Ten Years, Amount |
$ 6,383
|
|
| Due after Five Years though Ten Years, Yield |
2.67%
|
|
| Due after Ten Years, Amount |
$ 447
|
|
| Due after Ten Years, Yield |
2.07%
|
|
| Total, Amount |
$ 7,200
|
|
| Total, Yield |
2.64%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 48
|
|
| Due after One Year through Five Years, Amount |
322
|
|
| Due after Five Years though Ten Years, Amount |
6,351
|
|
| Due after Ten Years, Amount |
444
|
|
| 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 |
$ 0
|
|
| Due in One Year or Less, Yield |
0.00%
|
|
| Due after One Year through Five Years, Amount |
$ 7
|
|
| Due after One Year through Five Years, Yield |
2.68%
|
|
| Due after Five Years though Ten Years, Amount |
$ 182
|
|
| Due after Five Years though Ten Years, Yield |
1.96%
|
|
| Due after Ten Years, Amount |
$ 6,408
|
|
| Due after Ten Years, Yield |
6.71%
|
|
| Total, Amount |
$ 6,597
|
|
| Total, Yield |
6.57%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 0
|
|
| Due after One Year through Five Years, Amount |
7
|
|
| Due after Five Years though Ten Years, Amount |
181
|
|
| Due after Ten Years, Amount |
6,481
|
|
| 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 |
$ 49
|
|
| Due in One Year or Less, Yield |
8.54%
|
|
| Due after One Year through Five Years, Amount |
$ 545
|
|
| Due after One Year through Five Years, Yield |
2.36%
|
|
| Due after Five Years though Ten Years, Amount |
$ 7,114
|
|
| Due after Five Years though Ten Years, Yield |
2.64%
|
|
| Due after Ten Years, Amount |
$ 246,343
|
|
| Due after Ten Years, Yield |
3.36%
|
|
| Total, Amount |
$ 254,051
|
|
| Total, Yield |
3.53%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 49
|
|
| Due after One Year through Five Years, Amount |
479
|
|
| Due after Five Years though Ten Years, Amount |
7,087
|
|
| Due after Ten Years, Amount |
246,158
|
|
| 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 |
$ 22,924
|
|
| Due after One Year through Five Years, Yield |
1.64%
|
|
| Due after Five Years though Ten Years, Amount |
$ 1,239
|
|
| Due after Five Years though Ten Years, Yield |
2.71%
|
|
| Due after Ten Years, Amount |
$ 396
|
|
| Due after Ten Years, Yield |
5.41%
|
|
| Total, Amount |
$ 25,075
|
|
| Total, Yield |
1.72%
|
|
| 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 |
23,073
|
|
| Due after Five Years though Ten Years, Amount |
1,256
|
|
| Due after Ten Years, Amount |
432
|
|
| 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 |
$ 1,089
|
|
| Due after One Year through Five Years, Yield |
2.80%
|
|
| Due after Five Years though Ten Years, Amount |
$ 414
|
|
| Due after Five Years though Ten Years, Yield |
1.04%
|
|
| Due after Ten Years, Amount |
$ 367
|
|
| Due after Ten Years, Yield |
6.15%
|
|
| 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 |
1,093
|
|
| Due after Five Years though Ten Years, Amount |
418
|
|
| Due after Ten Years, Amount |
379
|
|
| 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 |
$ 2,624
|
|
| Due in One Year or Less, Yield |
1.14%
|
|
| Due after One Year through Five Years, Amount |
$ 4,621
|
|
| Due after One Year through Five Years, Yield |
1.19%
|
|
| Due after Five Years though Ten Years, Amount |
$ 1,910
|
|
| Due after Five Years though Ten Years, Yield |
2.53%
|
|
| Due after Ten Years, Amount |
$ 1,349
|
|
| Due after Ten Years, Yield |
3.00%
|
|
| Total, Amount |
$ 10,504
|
|
| Total, Yield |
1.66%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 2,809
|
|
| Due after One Year through Five Years, Amount |
4,378
|
|
| Due after Five Years though Ten Years, Amount |
1,942
|
|
| Due after Ten Years, Amount |
1,340
|
|
| 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 |
$ 19,936
|
|
| Due in One Year or Less, Yield |
0.87%
|
|
| Due after One Year through Five Years, Amount |
$ 29,248
|
|
| Due after One Year through Five Years, Yield |
1.65%
|
|
| Due after Five Years though Ten Years, Amount |
$ 10,808
|
|
| Due after Five Years though Ten Years, Yield |
2.58%
|
|
| Due after Ten Years, Amount |
$ 248,458
|
|
| Due after Ten Years, Yield |
3.37%
|
|
| Total, Amount |
$ 308,450
|
|
| Total, Yield |
3.02%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 20,135
|
|
| Due after One Year through Five Years, Amount |
29,093
|
|
| Due after Five Years though Ten Years, Amount |
10,831
|
|
| Due after Ten Years, Amount |
248,313
|
|
| 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 |
$ 833
|
|
| Due in One Year or Less, Yield |
1.26%
|
|
| Due after One Year through Five Years, Amount |
$ 5,113
|
|
| Due after One Year through Five Years, Yield |
1.30%
|
|
| Due after Five Years though Ten Years, Amount |
$ 5,880
|
|
| Due after Five Years though Ten Years, Yield |
1.35%
|
|
| Due after Ten Years, Amount |
$ 2,152
|
|
| Due after Ten Years, Yield |
1.58%
|
|
| 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 |
$ 833
|
|
| Due after One Year through Five Years, Amount |
5,146
|
|
| Due after Five Years though Ten Years, Amount |
5,883
|
|
| Due after Ten Years, Amount |
2,146
|
|
| 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 |
$ 20,769
|
|
| Due in One Year or Less, Yield |
0.88%
|
|
| Due after One Year through Five Years, Amount |
$ 34,361
|
|
| Due after One Year through Five Years, Yield |
1.60%
|
|
| Due after Five Years though Ten Years, Amount |
$ 16,688
|
|
| Due after Five Years though Ten Years, Yield |
2.14%
|
|
| Due after Ten Years, Amount |
$ 250,610
|
|
| Due after Ten Years, Yield |
3.35%
|
|
| Total, Amount |
$ 322,428
|
|
| Total, Yield |
2.95%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 20,968
|
|
| Due after One Year through Five Years, Amount |
34,239
|
|
| Due after Five Years though Ten Years, Amount |
16,714
|
|
| Due after Ten Years, Amount |
250,459
|
|
| Debt Securities Carried at Fair Value |
$ 322,380
|
|