|
Securities - Gross Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
|
Jun. 30, 2013
Securities
|
Dec. 31, 2012
Securities
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
$ 142,913
|
[1] |
$ 26,336
|
[2] |
| Less than Twelve Months, Gross Unrealized Losses |
(3,866)
|
[1] |
(279)
|
[2] |
| Twelve Months or Longer, Fair Value |
8,803
|
[1] |
16,314
|
[2] |
| Twelve Months or Longer, Gross Unrealized Losses |
(265)
|
[1] |
(381)
|
[2] |
| Total, Fair Value |
151,716
|
[1] |
42,650
|
[2] |
| Total, Gross Unrealized Losses |
(4,131)
|
[1] |
(660)
|
[2] |
| Table Details [Abstract] |
|
|
|
|
| Number of Available for Sale Securities Amortized Cost Exceeds Fair Value |
4,800
|
|
2,600
|
|
| Available for Sale Securities Amortized Cost Exceeding Fair Value |
(4,100)
|
|
(660)
|
|
|
Temporarily Impaired [Member] | US Government Corporations and Agencies Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
851
|
|
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(29)
|
|
|
|
| Twelve Months or Longer, Fair Value |
0
|
|
5,608
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
0
|
|
(84)
|
|
| Total, Fair Value |
851
|
|
5,608
|
|
| Total, Gross Unrealized Losses |
(29)
|
|
(84)
|
|
|
Temporarily Impaired [Member] | Debt Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
142,871
|
|
26,322
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(3,864)
|
|
(278)
|
|
| Twelve Months or Longer, Fair Value |
8,799
|
|
16,240
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(264)
|
|
(377)
|
|
| Total, Fair Value |
151,670
|
|
42,562
|
|
| Total, Gross Unrealized Losses |
(4,128)
|
|
(655)
|
|
|
Temporarily Impaired [Member] | Taxable Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
140,971
|
|
24,713
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(3,846)
|
|
(269)
|
|
| Twelve Months or Longer, Fair Value |
7,675
|
|
15,168
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(236)
|
|
(339)
|
|
| Total, Fair Value |
148,646
|
|
39,881
|
|
| Total, Gross Unrealized Losses |
(4,082)
|
|
(608)
|
|
|
Temporarily Impaired [Member] | Agency Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
122,638
|
|
15,593
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(3,433)
|
|
(133)
|
|
| Twelve Months or Longer, Fair Value |
1,151
|
|
735
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(43)
|
|
(13)
|
|
| Total, Fair Value |
123,789
|
|
16,328
|
|
| Total, Gross Unrealized Losses |
(3,476)
|
|
(146)
|
|
|
Temporarily Impaired [Member] | Collateralized Mortgage Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
14,388
|
|
5,135
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(341)
|
|
(121)
|
|
| Twelve Months or Longer, Fair Value |
3,732
|
|
4,994
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(68)
|
|
(97)
|
|
| Total, Fair Value |
18,120
|
|
10,129
|
|
| Total, Gross Unrealized Losses |
(409)
|
|
(218)
|
|
|
Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
1,056
|
|
592
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(21)
|
|
(13)
|
|
| Twelve Months or Longer, Fair Value |
1,349
|
|
1,555
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(106)
|
|
(110)
|
|
| Total, Fair Value |
2,405
|
|
2,147
|
|
| Total, Gross Unrealized Losses |
(127)
|
|
(123)
|
|
|
Temporarily Impaired [Member] | Commercial Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
30
|
|
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(1)
|
|
|
|
| Total, Fair Value |
30
|
|
|
|
| Total, Gross Unrealized Losses |
(1)
|
|
|
|
|
Temporarily Impaired [Member] | Foreign Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
526
|
|
1,715
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(12)
|
|
(1)
|
|
| Twelve Months or Longer, Fair Value |
44
|
|
563
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(10)
|
|
(5)
|
|
| Total, Fair Value |
570
|
|
2,278
|
|
| Total, Gross Unrealized Losses |
(22)
|
|
(6)
|
|
|
Temporarily Impaired [Member] | Corporate Bond Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
74
|
|
0
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(2)
|
|
0
|
|
| Twelve Months or Longer, Fair Value |
283
|
|
277
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(6)
|
|
(16)
|
|
| Total, Fair Value |
357
|
|
277
|
|
| Total, Gross Unrealized Losses |
(8)
|
|
(16)
|
|
|
Temporarily Impaired [Member] | Other Debt Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
1,408
|
|
1,678
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(7)
|
|
(1)
|
|
| Twelve Months or Longer, Fair Value |
1,116
|
|
1,436
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(3)
|
|
(14)
|
|
| Total, Fair Value |
2,524
|
|
3,114
|
|
| Total, Gross Unrealized Losses |
(10)
|
|
(15)
|
|
|
Temporarily Impaired [Member] | Tax-exempt securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
1,900
|
|
1,609
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(18)
|
|
(9)
|
|
| Twelve Months or Longer, Fair Value |
1,124
|
|
1,072
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(28)
|
|
(38)
|
|
| Total, Fair Value |
3,024
|
|
2,681
|
|
| Total, Gross Unrealized Losses |
(46)
|
|
(47)
|
|
|
Other Than Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
42
|
[3] |
14
|
[3] |
| Less than Twelve Months, Gross Unrealized Losses |
(2)
|
[3] |
(1)
|
[3] |
| Twelve Months or Longer, Fair Value |
4
|
[3] |
74
|
[3] |
| Twelve Months or Longer, Gross Unrealized Losses |
(1)
|
[3] |
(4)
|
[3] |
| Total, Fair Value |
46
|
[3] |
88
|
[3] |
| Total, Gross Unrealized Losses |
$ (3)
|
[3] |
$ (5)
|
[3] |
|
|
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