Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details) - USD ($)
$ in Millions |
12 Months Ended |
|
Dec. 31, 2016 |
Dec. 31, 2015 |
| 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 |
$ 26
|
|
| Due after One Year through Five Years, Yield |
4.01%
|
|
| Due after Five Years through Ten Years, Amount |
$ 971
|
|
| Due after Five Years though Ten Years, Yield |
2.32%
|
|
| Due after Ten Years, Amount |
$ 116,074
|
|
| Due after Ten Years, Yield |
3.01%
|
|
| Amortized Cost |
$ 117,071
|
$ 84,508
|
| Total, Yield |
3.01%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Debt securities carried at fair value |
$ 313,660
|
322,380
|
| 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 |
26
|
|
| Due after Five Years though Ten Years, Amount |
959
|
|
| Due after Ten Years, Amount |
114,300
|
|
| Held-to-maturity Securities, Fair Value |
115,285
|
$ 84,046
|
| Available-for-sale securities of business held for sale |
$ 619
|
|
| Maturity period |
1 year
|
|
| Available-for-sale debt securities of business held for sale, average yield |
0.21%
|
|
| Agency |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 2
|
|
| Due in One Year or Less, Yield |
4.50%
|
|
| Due after One Year through Five Years, Amount |
$ 47
|
|
| Due after One Year through Five Years, Yield |
4.45%
|
|
| Due after Five Years though Ten Years, Amount |
$ 381
|
|
| Due after Five Years though Ten Years, Yield |
2.56%
|
|
| Due after Ten Years, Amount |
$ 190,379
|
|
| Due after Ten Years, Yield |
3.23%
|
|
| Total, Amount |
$ 190,809
|
|
| Total, Yield |
3.23%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 2
|
|
| Due after One Year through Five Years, Amount |
48
|
|
| Due after Five Years though Ten Years, Amount |
382
|
|
| Due after Ten Years, Amount |
189,054
|
|
| Debt securities carried at fair value |
189,486
|
|
| 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 |
$ 8,300
|
|
| Due after Ten Years, Yield |
3.18%
|
|
| Total, Amount |
$ 8,300
|
|
| Total, Yield |
3.18%
|
|
| 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 |
8,335
|
|
| Debt securities carried at fair value |
8,335
|
|
| 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 |
$ 558
|
|
| Due after One Year through Five Years, Yield |
1.96%
|
|
| Due after Five Years though Ten Years, Amount |
$ 11,632
|
|
| Due after Five Years though Ten Years, Yield |
2.47%
|
|
| Due after Ten Years, Amount |
$ 356
|
|
| Due after Ten Years, Yield |
2.58%
|
|
| Total, Amount |
$ 12,594
|
|
| Total, Yield |
2.47%
|
|
| 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 |
559
|
|
| Due after Five Years though Ten Years, Amount |
11,378
|
|
| Due after Ten Years, Amount |
337
|
|
| Debt securities carried at fair value |
12,322
|
|
| 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 |
$ 0
|
|
| Due after One Year through Five Years, Yield |
0.00%
|
|
| Due after Five Years though Ten Years, Amount |
$ 12
|
|
| Due after Five Years though Ten Years, Yield |
0.01%
|
|
| Due after Ten Years, Amount |
$ 5,016
|
|
| Due after Ten Years, Yield |
8.50%
|
|
| Total, Amount |
$ 5,028
|
|
| Total, Yield |
8.48%
|
|
| 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 |
19
|
|
| Due after Ten Years, Amount |
5,133
|
|
| Debt securities carried at fair value |
5,152
|
|
| Mortgage-backed securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 50
|
|
| Due in One Year or Less, Yield |
8.32%
|
|
| Due after One Year through Five Years, Amount |
$ 605
|
|
| Due after One Year through Five Years, Yield |
2.15%
|
|
| Due after Five Years though Ten Years, Amount |
$ 12,025
|
|
| Due after Five Years though Ten Years, Yield |
2.46%
|
|
| Due after Ten Years, Amount |
$ 204,051
|
|
| Due after Ten Years, Yield |
3.36%
|
|
| Total, Amount |
$ 216,731
|
|
| Total, Yield |
3.31%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 50
|
|
| Due after One Year through Five Years, Amount |
607
|
|
| Due after Five Years though Ten Years, Amount |
11,779
|
|
| Due after Ten Years, Amount |
202,859
|
|
| Debt securities carried at fair value |
215,295
|
|
| 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 |
$ 517
|
|
| Due in One Year or Less, Yield |
0.47%
|
|
| Due after One Year through Five Years, Amount |
$ 34,898
|
|
| Due after One Year through Five Years, Yield |
1.57%
|
|
| Due after Five Years though Ten Years, Amount |
$ 13,234
|
|
| Due after Five Years though Ten Years, Yield |
1.58%
|
|
| Due after Ten Years, Amount |
$ 151
|
|
| Due after Ten Years, Yield |
5.42%
|
|
| Total, Amount |
$ 48,800
|
|
| Total, Yield |
1.57%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 517
|
|
| Due after One Year through Five Years, Amount |
34,784
|
|
| Due after Five Years though Ten Years, Amount |
12,788
|
|
| Due after Ten Years, Amount |
163
|
|
| Debt securities carried at fair value |
48,252
|
|
| Non-U.S. securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 21,164
|
|
| Due in One Year or Less, Yield |
0.25%
|
|
| Due after One Year through Five Years, Amount |
$ 1,097
|
|
| Due after One Year through Five Years, Yield |
1.92%
|
|
| Due after Five Years though Ten Years, Amount |
$ 206
|
|
| Due after Five Years though Ten Years, Yield |
1.30%
|
|
| Due after Ten Years, Amount |
$ 240
|
|
| Due after Ten Years, Yield |
6.60%
|
|
| Total, Amount |
$ 22,707
|
|
| Total, Yield |
0.41%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 21,165
|
|
| Due after One Year through Five Years, Amount |
1,100
|
|
| Due after Five Years though Ten Years, Amount |
208
|
|
| Due after Ten Years, Amount |
245
|
|
| Debt securities carried at fair value |
22,718
|
|
| 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 |
$ 2,040
|
|
| Due in One Year or Less, Yield |
1.77%
|
|
| Due after One Year through Five Years, Amount |
$ 5,102
|
|
| Due after One Year through Five Years, Yield |
1.63%
|
|
| Due after Five Years though Ten Years, Amount |
$ 2,279
|
|
| Due after Five Years though Ten Years, Yield |
2.71%
|
|
| Due after Ten Years, Amount |
$ 1,396
|
|
| Due after Ten Years, Yield |
3.18%
|
|
| Total, Amount |
$ 10,817
|
|
| Total, Yield |
2.08%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 2,036
|
|
| Due after One Year through Five Years, Amount |
5,078
|
|
| Due after Five Years though Ten Years, Amount |
2,303
|
|
| Due after Ten Years, Amount |
1,437
|
|
| Debt securities carried at fair value |
10,854
|
|
| Total taxable securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 23,771
|
|
| Due in One Year or Less, Yield |
0.40%
|
|
| Due after One Year through Five Years, Amount |
$ 41,702
|
|
| Due after One Year through Five Years, Yield |
1.59%
|
|
| Due after Five Years though Ten Years, Amount |
$ 27,744
|
|
| Due after Five Years though Ten Years, Yield |
2.05%
|
|
| Due after Ten Years, Amount |
$ 205,838
|
|
| Due after Ten Years, Yield |
3.36%
|
|
| Total, Amount |
$ 299,055
|
|
| Total, Yield |
2.76%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 23,768
|
|
| Due after One Year through Five Years, Amount |
41,569
|
|
| Due after Five Years though Ten Years, Amount |
27,078
|
|
| Due after Ten Years, Amount |
204,704
|
|
| Debt securities carried at fair value |
297,119
|
|
| Tax-exempt securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 646
|
|
| Due in One Year or Less, Yield |
1.13%
|
|
| Due after One Year through Five Years, Amount |
$ 6,563
|
|
| Due after One Year through Five Years, Yield |
1.49%
|
|
| Due after Five Years though Ten Years, Amount |
$ 7,846
|
|
| Due after Five Years though Ten Years, Yield |
1.57%
|
|
| Due after Ten Years, Amount |
$ 2,217
|
|
| Due after Ten Years, Yield |
1.53%
|
|
| Total, Amount |
$ 17,272
|
|
| Total, Yield |
1.52%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 646
|
|
| Due after One Year through Five Years, Amount |
6,561
|
|
| Due after Five Years though Ten Years, Amount |
7,754
|
|
| Due after Ten Years, Amount |
2,199
|
|
| Debt securities carried at fair value |
17,160
|
|
| Debt securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 24,417
|
|
| Due in One Year or Less, Yield |
0.42%
|
|
| Due after One Year through Five Years, Amount |
$ 48,265
|
|
| Due after One Year through Five Years, Yield |
1.58%
|
|
| Due after Five Years though Ten Years, Amount |
$ 35,590
|
|
| Due after Five Years though Ten Years, Yield |
1.95%
|
|
| Due after Ten Years, Amount |
$ 208,055
|
|
| Due after Ten Years, Yield |
3.34%
|
|
| Total, Amount |
$ 316,327
|
|
| Total, Yield |
2.69%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 24,414
|
|
| Due after One Year through Five Years, Amount |
48,130
|
|
| Due after Five Years though Ten Years, Amount |
34,832
|
|
| Due after Ten Years, Amount |
206,903
|
|
| Debt securities carried at fair value |
$ 314,279
|
|