Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details) - USD ($)
$ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 657
|
|
| Due in One Year or Less, Yield |
5.78%
|
|
| Due after One Year through Five Years, Amount |
$ 18
|
|
| Due after One Year through Five Years, Yield |
3.93%
|
|
| Due after Five Years through Ten Years, Amount |
$ 1,475
|
|
| Due after Five Years though Ten Years, Yield |
2.89%
|
|
| Due after Ten Years, Amount |
$ 201,502
|
|
| Due after Ten Years, Yield |
3.23%
|
|
| Amortized Cost |
$ 203,652
|
$ 125,013
|
| Total, Yield |
3.24%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Debt securities carried at fair value |
$ 238,101
|
315,117
|
| Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Due in One Year or Less, Amount |
657
|
|
| Due after One Year through Five Years, Amount |
18
|
|
| Due after Five Years though Ten Years, Amount |
1,429
|
|
| Due after Ten Years, Amount |
198,331
|
|
| Debt Securities, Held-to-maturity, Fair Value |
200,435
|
$ 123,299
|
| Mortgage-backed securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 198
|
|
| Due in One Year or Less, Yield |
1.78%
|
|
| Due after One Year through Five Years, Amount |
$ 2,581
|
|
| Due after One Year through Five Years, Yield |
2.36%
|
|
| Due after Five Years though Ten Years, Amount |
$ 12,265
|
|
| Due after Five Years though Ten Years, Yield |
2.51%
|
|
| Due after Ten Years, Amount |
$ 133,444
|
|
| Due after Ten Years, Yield |
3.49%
|
|
| Total, Amount |
$ 148,488
|
|
| Total, Yield |
3.39%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 198
|
|
| Due after One Year through Five Years, Amount |
2,539
|
|
| Due after Five Years though Ten Years, Amount |
11,928
|
|
| Due after Ten Years, Amount |
130,292
|
|
| Debt securities carried at fair value |
144,957
|
|
| Agency |
|
|
| 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 |
$ 114
|
|
| Due after One Year through Five Years, Yield |
2.42%
|
|
| Due after Five Years though Ten Years, Amount |
$ 1,245
|
|
| Due after Five Years though Ten Years, Yield |
2.39%
|
|
| Due after Ten Years, Amount |
$ 123,757
|
|
| Due after Ten Years, Yield |
3.34%
|
|
| Total, Amount |
$ 125,116
|
|
| Total, Yield |
3.33%
|
|
| 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 |
114
|
|
| Due after Five Years though Ten Years, Amount |
1,219
|
|
| Due after Ten Years, Amount |
120,493
|
|
| Debt securities carried at fair value |
121,826
|
|
| 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 |
$ 30
|
|
| Due after Five Years though Ten Years, Yield |
2.50%
|
|
| Due after Ten Years, Amount |
$ 5,591
|
|
| Due after Ten Years, Yield |
3.17%
|
|
| Total, Amount |
$ 5,621
|
|
| Total, Yield |
3.17%
|
|
| 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 |
29
|
|
| Due after Ten Years, Amount |
5,501
|
|
| Debt securities carried at fair value |
5,530
|
|
| Commercial |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 198
|
|
| Due in One Year or Less, Yield |
1.78%
|
|
| Due after One Year through Five Years, Amount |
$ 2,467
|
|
| Due after One Year through Five Years, Yield |
2.36%
|
|
| Due after Five Years though Ten Years, Amount |
$ 10,976
|
|
| Due after Five Years though Ten Years, Yield |
2.53%
|
|
| Due after Ten Years, Amount |
$ 828
|
|
| Due after Ten Years, Yield |
2.96%
|
|
| Total, Amount |
$ 14,469
|
|
| Total, Yield |
2.52%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 198
|
|
| Due after One Year through Five Years, Amount |
2,425
|
|
| Due after Five Years though Ten Years, Amount |
10,656
|
|
| Due after Ten Years, Amount |
799
|
|
| Debt securities carried at fair value |
14,078
|
|
| 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 |
$ 14
|
|
| Due after Five Years though Ten Years, Yield |
0.00%
|
|
| Due after Ten Years, Amount |
$ 3,268
|
|
| Due after Ten Years, Yield |
9.88%
|
|
| Total, Amount |
$ 3,282
|
|
| Total, Yield |
9.84%
|
|
| 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 |
24
|
|
| Due after Ten Years, Amount |
3,499
|
|
| Debt securities carried at fair value |
3,523
|
|
| 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 |
$ 670
|
|
| Due in One Year or Less, Yield |
0.78%
|
|
| Due after One Year through Five Years, Amount |
$ 33,659
|
|
| Due after One Year through Five Years, Yield |
1.48%
|
|
| Due after Five Years though Ten Years, Amount |
$ 23,159
|
|
| Due after Five Years though Ten Years, Yield |
2.36%
|
|
| Due after Ten Years, Amount |
$ 21
|
|
| Due after Ten Years, Yield |
2.57%
|
|
| Total, Amount |
$ 57,509
|
|
| Total, Yield |
1.83%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 669
|
|
| Due after One Year through Five Years, Amount |
32,694
|
|
| Due after Five Years though Ten Years, Amount |
22,821
|
|
| Due after Ten Years, Amount |
21
|
|
| Debt securities carried at fair value |
56,205
|
|
| Non-U.S. securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 14,318
|
|
| Due in One Year or Less, Yield |
1.30%
|
|
| Due after One Year through Five Years, Amount |
$ 682
|
|
| Due after One Year through Five Years, Yield |
1.88%
|
|
| Due after Five Years though Ten Years, Amount |
$ 21
|
|
| Due after Five Years though Ten Years, Yield |
4.43%
|
|
| Due after Ten Years, Amount |
$ 121
|
|
| Due after Ten Years, Yield |
6.57%
|
|
| Total, Amount |
$ 15,142
|
|
| Total, Yield |
1.37%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 14,315
|
|
| Due after One Year through Five Years, Amount |
692
|
|
| Due after Five Years though Ten Years, Amount |
19
|
|
| Due after Ten Years, Amount |
124
|
|
| Debt securities carried at fair value |
15,150
|
|
| 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 |
$ 1,591
|
|
| Due in One Year or Less, Yield |
3.34%
|
|
| Due after One Year through Five Years, Amount |
$ 2,022
|
|
| Due after One Year through Five Years, Yield |
3.54%
|
|
| Due after Five Years though Ten Years, Amount |
$ 688
|
|
| Due after Five Years though Ten Years, Yield |
3.48%
|
|
| Due after Ten Years, Amount |
$ 86
|
|
| Due after Ten Years, Yield |
5.59%
|
|
| Total, Amount |
$ 4,387
|
|
| Total, Yield |
3.49%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 1,585
|
|
| Due after One Year through Five Years, Amount |
2,043
|
|
| Due after Five Years though Ten Years, Amount |
698
|
|
| Due after Ten Years, Amount |
87
|
|
| Debt securities carried at fair value |
4,413
|
|
| Total taxable securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 16,777
|
|
| Due in One Year or Less, Yield |
1.48%
|
|
| Due after One Year through Five Years, Amount |
$ 38,944
|
|
| Due after One Year through Five Years, Yield |
1.66%
|
|
| Due after Five Years though Ten Years, Amount |
$ 36,133
|
|
| Due after Five Years though Ten Years, Yield |
2.43%
|
|
| Due after Ten Years, Amount |
$ 133,672
|
|
| Due after Ten Years, Yield |
3.49%
|
|
| Total, Amount |
$ 225,526
|
|
| Total, Yield |
2.85%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 16,767
|
|
| Due after One Year through Five Years, Amount |
37,968
|
|
| Due after Five Years though Ten Years, Amount |
35,466
|
|
| Due after Ten Years, Amount |
130,524
|
|
| Debt securities carried at fair value |
220,725
|
|
| Tax-exempt securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 938
|
|
| Due in One Year or Less, Yield |
2.59%
|
|
| Due after One Year through Five Years, Amount |
$ 7,526
|
|
| Due after One Year through Five Years, Yield |
2.59%
|
|
| Due after Five Years though Ten Years, Amount |
$ 6,162
|
|
| Due after Five Years though Ten Years, Yield |
2.44%
|
|
| Due after Ten Years, Amount |
$ 2,723
|
|
| Due after Ten Years, Yield |
2.55%
|
|
| Total, Amount |
$ 17,349
|
|
| Total, Yield |
2.53%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 936
|
|
| Due after One Year through Five Years, Amount |
7,537
|
|
| Due after Five Years though Ten Years, Amount |
6,184
|
|
| Due after Ten Years, Amount |
2,719
|
|
| Debt securities carried at fair value |
17,376
|
|
| Debt securities |
|
|
| Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 17,715
|
|
| Due in One Year or Less, Yield |
1.54%
|
|
| Due after One Year through Five Years, Amount |
$ 46,470
|
|
| Due after One Year through Five Years, Yield |
1.81%
|
|
| Due after Five Years though Ten Years, Amount |
$ 42,295
|
|
| Due after Five Years though Ten Years, Yield |
2.43%
|
|
| Due after Ten Years, Amount |
$ 136,395
|
|
| Due after Ten Years, Yield |
3.47%
|
|
| Total, Amount |
$ 242,875
|
|
| Total, Yield |
2.83%
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] |
|
|
| Due in One Year or Less, Amount |
$ 17,703
|
|
| Due after One Year through Five Years, Amount |
45,505
|
|
| Due after Five Years though Ten Years, Amount |
41,650
|
|
| Due after Ten Years, Amount |
133,243
|
|
| Debt securities carried at fair value |
$ 238,101
|
|