|
Securities - Gross Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
|
Sep. 30, 2012
Securities
|
Dec. 31, 2011
Securities
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
$ 21,043
|
[1] |
$ 25,233
|
[1] |
| Less than Twelve Months, Gross Unrealized Losses |
(88)
|
[1] |
(344)
|
[1] |
| Twelve Months or Longer, Fair Value |
27,855
|
[1] |
48,555
|
[1] |
| Twelve Months or Longer, Gross Unrealized Losses |
(546)
|
[1] |
(1,346)
|
[1] |
| Total, Fair Value |
48,898
|
[1] |
73,788
|
[1] |
| Total, Gross Unrealized Losses |
(634)
|
[1] |
(1,690)
|
[1] |
| Table Details [Abstract] |
|
|
|
|
| Number of Available for Sale Securities Amortized Cost Exceeds Fair Value |
2,300
|
|
3,800
|
|
| Available for Sale Securities Amortized Cost Exceeding Fair Value |
634
|
|
1,700
|
|
|
Temporarily Impaired [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
21,004
|
|
25,075
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(87)
|
|
(316)
|
|
| Twelve Months or Longer, Fair Value |
27,767
|
|
48,066
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(541)
|
|
(1,301)
|
|
| Total, Fair Value |
48,771
|
|
73,141
|
|
| Total, Gross Unrealized Losses |
(628)
|
|
(1,617)
|
|
|
Temporarily Impaired [Member] | Debt Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
21,004
|
|
25,044
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(87)
|
|
(315)
|
|
| Twelve Months or Longer, Fair Value |
27,760
|
|
48,060
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(536)
|
|
(1,295)
|
|
| Total, Fair Value |
48,764
|
|
73,104
|
|
| Total, Gross Unrealized Losses |
(623)
|
|
(1,610)
|
|
|
Temporarily Impaired [Member] | Taxable Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
20,724
|
|
23,927
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(79)
|
|
(290)
|
|
| Twelve Months or Longer, Fair Value |
26,579
|
|
45,306
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(494)
|
|
(1,230)
|
|
| Total, Fair Value |
47,303
|
|
69,233
|
|
| Total, Gross Unrealized Losses |
(573)
|
|
(1,520)
|
|
|
Temporarily Impaired [Member] | United States Treasury And Agency Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
6,262
|
|
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(11)
|
|
|
|
| Twelve Months or Longer, Fair Value |
15,155
|
|
38,269
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(224)
|
|
(811)
|
|
| Total, Fair Value |
21,417
|
|
38,269
|
|
| Total, Gross Unrealized Losses |
(235)
|
|
(811)
|
|
|
Temporarily Impaired [Member] | Agency Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
4,361
|
|
4,679
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(18)
|
|
(13)
|
|
| Twelve Months or Longer, Fair Value |
849
|
|
474
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(6)
|
|
(8)
|
|
| Total, Fair Value |
5,210
|
|
5,153
|
|
| Total, Gross Unrealized Losses |
(24)
|
|
(21)
|
|
|
Temporarily Impaired [Member] | Collateralized Mortgage Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
4,952
|
|
11,448
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(20)
|
|
(134)
|
|
| Twelve Months or Longer, Fair Value |
6,209
|
|
976
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(108)
|
|
(33)
|
|
| Total, Fair Value |
11,161
|
|
12,424
|
|
| Total, Gross Unrealized Losses |
(128)
|
|
(167)
|
|
|
Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
822
|
|
2,112
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(17)
|
|
(59)
|
|
| Twelve Months or Longer, Fair Value |
1,735
|
|
3,950
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(124)
|
|
(350)
|
|
| Total, Fair Value |
2,557
|
|
6,062
|
|
| Total, Gross Unrealized Losses |
(141)
|
|
(409)
|
|
|
Temporarily Impaired [Member] | Commercial Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
|
|
55
|
|
| Less than Twelve Months, Gross Unrealized Losses |
|
|
(1)
|
|
| Total, Fair Value |
|
|
55
|
|
| 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 |
743
|
|
1,008
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(2)
|
|
(13)
|
|
| Twelve Months or Longer, Fair Value |
569
|
|
165
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(9)
|
|
(1)
|
|
| Total, Fair Value |
1,312
|
|
1,173
|
|
| Total, Gross Unrealized Losses |
(11)
|
|
(14)
|
|
|
Temporarily Impaired [Member] | Corporate Bond Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
188
|
|
415
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(9)
|
|
(29)
|
|
| Twelve Months or Longer, Fair Value |
101
|
|
111
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(9)
|
|
(8)
|
|
| Total, Fair Value |
289
|
|
526
|
|
| Total, Gross Unrealized Losses |
(18)
|
|
(37)
|
|
|
Temporarily Impaired [Member] | Other Debt Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
3,396
|
|
4,210
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(2)
|
|
(41)
|
|
| Twelve Months or Longer, Fair Value |
1,961
|
|
1,361
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(14)
|
|
(19)
|
|
| Total, Fair Value |
5,357
|
|
5,571
|
|
| Total, Gross Unrealized Losses |
(16)
|
|
(60)
|
|
|
Temporarily Impaired [Member] | Tax-exempt securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
280
|
|
1,117
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(8)
|
|
(25)
|
|
| Twelve Months or Longer, Fair Value |
1,181
|
|
2,754
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(42)
|
|
(65)
|
|
| Total, Fair Value |
1,461
|
|
3,871
|
|
| Total, Gross Unrealized Losses |
(50)
|
|
(90)
|
|
|
Temporarily Impaired [Member] | Equity Securities
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
0
|
|
31
|
|
| Less than Twelve Months, Gross Unrealized Losses |
0
|
|
(1)
|
|
| Twelve Months or Longer, Fair Value |
7
|
|
6
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(5)
|
|
(6)
|
|
| Total, Fair Value |
7
|
|
37
|
|
| Total, Gross Unrealized Losses |
(5)
|
|
(7)
|
|
|
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 |
39
|
[2] |
158
|
[2] |
| Less than Twelve Months, Gross Unrealized Losses |
(1)
|
[2] |
(28)
|
[2] |
| Twelve Months or Longer, Fair Value |
88
|
[2] |
489
|
[2] |
| Twelve Months or Longer, Gross Unrealized Losses |
(5)
|
[2] |
(45)
|
[2] |
| Total, Fair Value |
127
|
[2] |
647
|
[2] |
| Total, Gross Unrealized Losses |
$ (6)
|
[2] |
$ (73)
|
[2] |
|
|
|