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Securities - Gross Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
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Sep. 30, 2014
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Dec. 31, 2013
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Debt securities
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
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| Less than Twelve Months, Fair Value |
$ 71,722
|
[1] |
$ 154,358
|
[1] |
| Less than Twelve Months, Gross Unrealized Losses |
(272)
|
[1] |
(5,791)
|
[1] |
| Twelve Months or Longer, Fair Value |
84,275
|
[1] |
14,839
|
[1] |
| Twelve Months or Longer, Gross Unrealized Losses |
(2,249)
|
[1] |
(760)
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[1] |
| Total, Fair Value |
155,997
|
[1] |
169,197
|
[1] |
| Total, Gross Unrealized Losses |
(2,521)
|
[1] |
(6,551)
|
[1] |
|
Temporarily impaired AFS debt securities | Debt securities
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|
|
|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
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| Less than Twelve Months, Fair Value |
71,325
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|
154,356
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(248)
|
|
(5,790)
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|
| Twelve Months or Longer, Fair Value |
84,275
|
|
14,838
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(2,249)
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|
(759)
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| Total, Fair Value |
155,600
|
|
169,194
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|
| Total, Gross Unrealized Losses |
(2,497)
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|
(6,549)
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|
Temporarily impaired AFS debt securities | U.S. Treasury and agency securities
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|
|
|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
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| Less than Twelve Months, Fair Value |
38,672
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|
5,770
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(110)
|
|
(61)
|
|
| Twelve Months or Longer, Fair Value |
682
|
|
19
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(15)
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|
(1)
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| Total, Fair Value |
39,354
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|
5,789
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|
| Total, Gross Unrealized Losses |
(125)
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|
(62)
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|
Temporarily impaired AFS debt securities | Agency
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|
|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
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| Less than Twelve Months, Fair Value |
24,807
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|
132,032
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(83)
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|
(5,457)
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|
| Twelve Months or Longer, Fair Value |
78,277
|
|
9,324
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(2,080)
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|
(497)
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|
| Total, Fair Value |
103,084
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|
141,356
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| Total, Gross Unrealized Losses |
(2,163)
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|
(5,954)
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Temporarily impaired AFS debt securities | Agency-collateralized mortgage obligations
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|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
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| Less than Twelve Months, Fair Value |
4,091
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|
13,438
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| Less than Twelve Months, Gross Unrealized Losses |
(22)
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|
(210)
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|
| Twelve Months or Longer, Fair Value |
3,305
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|
2,661
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|
| Twelve Months or Longer, Gross Unrealized Losses |
(74)
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|
(105)
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| Total, Fair Value |
7,396
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|
16,099
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|
| Total, Gross Unrealized Losses |
(96)
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|
(315)
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Temporarily impaired AFS debt securities | Non-agency residential
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|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
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|
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| Less than Twelve Months, Fair Value |
618
|
|
819
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|
| Less than Twelve Months, Gross Unrealized Losses |
(10)
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|
(15)
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|
| Twelve Months or Longer, Fair Value |
811
|
|
1,237
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|
| Twelve Months or Longer, Gross Unrealized Losses |
(47)
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|
(106)
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| Total, Fair Value |
1,429
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|
2,056
|
|
| Total, Gross Unrealized Losses |
(57)
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|
(121)
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Temporarily impaired AFS debt securities | Commercial
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
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| Less than Twelve Months, Fair Value |
404
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|
286
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| Less than Twelve Months, Gross Unrealized Losses |
(4)
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|
(12)
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| Twelve Months or Longer, Fair Value |
0
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|
0
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| Twelve Months or Longer, Gross Unrealized Losses |
0
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|
0
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| Total, Fair Value |
404
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|
286
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| Total, Gross Unrealized Losses |
(4)
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|
(12)
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Temporarily impaired AFS debt securities | Non-U.S. securities
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
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|
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| Less than Twelve Months, Fair Value |
159
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|
0
|
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| Less than Twelve Months, Gross Unrealized Losses |
(8)
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|
0
|
|
| Twelve Months or Longer, Fair Value |
35
|
|
45
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(2)
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|
(24)
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| Total, Fair Value |
194
|
|
45
|
|
| Total, Gross Unrealized Losses |
(10)
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|
(24)
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Temporarily impaired AFS debt securities | Corporate/Agency bonds
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|
|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
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| Less than Twelve Months, Fair Value |
0
|
|
106
|
|
| Less than Twelve Months, Gross Unrealized Losses |
0
|
|
(3)
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|
| Twelve Months or Longer, Fair Value |
93
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|
282
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|
| Twelve Months or Longer, Gross Unrealized Losses |
(2)
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|
(4)
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| Total, Fair Value |
93
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|
388
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| Total, Gross Unrealized Losses |
(2)
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|
(7)
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Temporarily impaired AFS debt securities | Other taxable securities, substantially all asset-backed securities
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
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| Less than Twelve Months, Fair Value |
984
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|
116
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| Less than Twelve Months, Gross Unrealized Losses |
(8)
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|
(2)
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| Twelve Months or Longer, Fair Value |
705
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|
280
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|
| Twelve Months or Longer, Gross Unrealized Losses |
(11)
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|
(3)
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| Total, Fair Value |
1,689
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|
396
|
|
| Total, Gross Unrealized Losses |
(19)
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|
(5)
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Temporarily impaired AFS debt securities | Total taxable securities
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
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| Less than Twelve Months, Fair Value |
69,735
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|
152,567
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(245)
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|
(5,760)
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|
| Twelve Months or Longer, Fair Value |
83,908
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|
13,848
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| Twelve Months or Longer, Gross Unrealized Losses |
(2,231)
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|
(740)
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| Total, Fair Value |
153,643
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|
166,415
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| Total, Gross Unrealized Losses |
(2,476)
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|
(6,500)
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Temporarily impaired AFS debt securities | Tax-exempt securities
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|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
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| Less than Twelve Months, Fair Value |
1,590
|
|
1,789
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|
| Less than Twelve Months, Gross Unrealized Losses |
(3)
|
|
(30)
|
|
| Twelve Months or Longer, Fair Value |
367
|
|
990
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(18)
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|
(19)
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| Total, Fair Value |
1,957
|
|
2,779
|
|
| Total, Gross Unrealized Losses |
(21)
|
|
(49)
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|
|
Other-than-temporarily impaired AFS debt securities | Non-agency residential
|
|
|
|
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| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
397
|
[1] |
2
|
[1] |
| Less than Twelve Months, Gross Unrealized Losses |
(24)
|
[1] |
(1)
|
[1] |
| Twelve Months or Longer, Fair Value |
0
|
[1] |
1
|
[1] |
| Twelve Months or Longer, Gross Unrealized Losses |
0
|
[1] |
(1)
|
[1] |
| Total, Fair Value |
397
|
[1] |
3
|
[1] |
| Total, Gross Unrealized Losses |
$ (24)
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[1] |
$ (2)
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[1] |
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