|
Securities - Gross Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
|
Mar. 31, 2014
|
Dec. 31, 2013
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
$ 163,636
|
[1] |
$ 154,358
|
[1] |
| Less than Twelve Months, Gross Unrealized Losses |
(4,118)
|
[1] |
(5,791)
|
[1] |
| Twelve Months or Longer, Fair Value |
15,301
|
[1] |
14,839
|
[1] |
| Twelve Months or Longer, Gross Unrealized Losses |
(583)
|
[1] |
(760)
|
[1] |
| Total, Fair Value |
178,937
|
[1] |
169,197
|
[1] |
| Total, Gross Unrealized Losses |
(4,701)
|
[1] |
(6,551)
|
[1] |
|
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 |
23,797
|
|
5,770
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(119)
|
|
(61)
|
|
| Twelve Months or Longer, Fair Value |
93
|
|
19
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(2)
|
|
(1)
|
|
| Total, Fair Value |
23,890
|
|
5,789
|
|
| Total, Gross Unrealized Losses |
(121)
|
|
(62)
|
|
|
Temporarily Impaired [Member] | Debt Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
163,636
|
|
154,356
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(4,118)
|
|
(5,790)
|
|
| Twelve Months or Longer, Fair Value |
15,300
|
|
14,838
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(582)
|
|
(759)
|
|
| Total, Fair Value |
178,936
|
|
169,194
|
|
| Total, Gross Unrealized Losses |
(4,700)
|
|
(6,549)
|
|
|
Temporarily Impaired [Member] | Agency MBS [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
131,550
|
|
132,032
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(3,910)
|
|
(5,457)
|
|
| Twelve Months or Longer, Fair Value |
9,518
|
|
9,324
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(389)
|
|
(497)
|
|
| Total, Fair Value |
141,068
|
|
141,356
|
|
| Total, Gross Unrealized Losses |
(4,299)
|
|
(5,954)
|
|
|
Temporarily Impaired [Member] | Collateralized Mortgage Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
3,340
|
|
13,438
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(49)
|
|
(210)
|
|
| Twelve Months or Longer, Fair Value |
2,900
|
|
2,661
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(60)
|
|
(105)
|
|
| Total, Fair Value |
6,240
|
|
16,099
|
|
| Total, Gross Unrealized Losses |
(109)
|
|
(315)
|
|
|
Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
531
|
|
819
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(8)
|
|
(15)
|
|
| Twelve Months or Longer, Fair Value |
959
|
|
1,237
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(88)
|
|
(106)
|
|
| Total, Fair Value |
1,490
|
|
2,056
|
|
| Total, Gross Unrealized Losses |
(96)
|
|
(121)
|
|
|
Temporarily Impaired [Member] | Commercial Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
530
|
|
286
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(5)
|
|
(12)
|
|
| Twelve Months or Longer, Fair Value |
0
|
|
0
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
0
|
|
0
|
|
| Total, Fair Value |
530
|
|
286
|
|
| Total, Gross Unrealized Losses |
(5)
|
|
(12)
|
|
|
Temporarily Impaired [Member] | Foreign Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
0
|
|
0
|
|
| Less than Twelve Months, Gross Unrealized Losses |
0
|
|
0
|
|
| Twelve Months or Longer, Fair Value |
42
|
|
45
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(18)
|
|
(24)
|
|
| Total, Fair Value |
42
|
|
45
|
|
| Total, Gross Unrealized Losses |
(18)
|
|
(24)
|
|
|
Temporarily Impaired [Member] | Corporate Bond Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
0
|
|
106
|
|
| Less than Twelve Months, Gross Unrealized Losses |
0
|
|
(3)
|
|
| Twelve Months or Longer, Fair Value |
313
|
|
282
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(4)
|
|
(4)
|
|
| Total, Fair Value |
313
|
|
388
|
|
| Total, Gross Unrealized Losses |
(4)
|
|
(7)
|
|
|
Temporarily Impaired [Member] | Other Debt Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
2,300
|
|
116
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(10)
|
|
(2)
|
|
| Twelve Months or Longer, Fair Value |
457
|
|
280
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(5)
|
|
(3)
|
|
| Total, Fair Value |
2,757
|
|
396
|
|
| Total, Gross Unrealized Losses |
(15)
|
|
(5)
|
|
|
Temporarily Impaired [Member] | Taxable Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
162,048
|
|
152,567
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(4,101)
|
|
(5,760)
|
|
| Twelve Months or Longer, Fair Value |
14,282
|
|
13,848
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(566)
|
|
(740)
|
|
| Total, Fair Value |
176,330
|
|
166,415
|
|
| Total, Gross Unrealized Losses |
(4,667)
|
|
(6,500)
|
|
|
Temporarily Impaired [Member] | Tax-exempt securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
1,588
|
|
1,789
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(17)
|
|
(30)
|
|
| Twelve Months or Longer, Fair Value |
1,018
|
|
990
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(16)
|
|
(19)
|
|
| Total, Fair Value |
2,606
|
|
2,779
|
|
| Total, Gross Unrealized Losses |
(33)
|
|
(49)
|
|
|
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 |
0
|
[1] |
2
|
[1] |
| Less than Twelve Months, Gross Unrealized Losses |
0
|
[1] |
(1)
|
[1] |
| Twelve Months or Longer, Fair Value |
1
|
[1] |
1
|
[1] |
| Twelve Months or Longer, Gross Unrealized Losses |
(1)
|
[1] |
(1)
|
[1] |
| Total, Fair Value |
1
|
[1] |
3
|
[1] |
| Total, Gross Unrealized Losses |
$ (1)
|
[1] |
$ (2)
|
[1] |
|
|
|