|
Securities Available for Sale, Gross Unrealized Losses and Fair Value (Details) (USD $)
In Millions, unless otherwise specified
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
$ (108) |
$ (916) |
| Less than 12 months, Fair Value |
10,727 |
39,083 |
| 12 months or more, Gross Unrealized Losses |
(946) |
(2,253) |
| 12 months or more, Fair Value |
11,441 |
14,530 |
| Total Gross Unrealized Losses |
(1,054) |
(3,169) |
| Total, Fair Value |
22,168 |
53,613 |
|
Debt Securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(96) |
(894) |
| Less than 12 months, Fair Value |
10,563 |
38,706 |
| 12 months or more, Gross Unrealized Losses |
(909) |
(2,212) |
| 12 months or more, Fair Value |
10,903 |
14,000 |
| Total Gross Unrealized Losses |
(1,005) |
(3,106) |
| Total, Fair Value |
21,466 |
52,706 |
|
US Treasury and Government [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
0 |
(11) |
| Less than 12 months, Fair Value |
0 |
5,473 |
| 12 months or more, Gross Unrealized Losses |
0 |
0 |
| 12 months or more, Fair Value |
0 |
0 |
| Total Gross Unrealized Losses |
0 |
(11) |
| Total, Fair Value |
0 |
5,473 |
|
US States and Political Subdivisions [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(55) |
(229) |
| Less than 12 months, Fair Value |
2,709 |
8,501 |
| 12 months or more, Gross Unrealized Losses |
(389) |
(654) |
| 12 months or more, Fair Value |
4,662 |
4,348 |
| Total Gross Unrealized Losses |
(444) |
(883) |
| Total, Fair Value |
7,371 |
12,849 |
|
Mortgage Backed Securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(14) |
(244) |
| Less than 12 months, Fair Value |
2,999 |
9,355 |
| 12 months or more, Gross Unrealized Losses |
(307) |
(1,108) |
| 12 months or more, Fair Value |
4,128 |
8,031 |
| Total Gross Unrealized Losses |
(321) |
(1,352) |
| Total, Fair Value |
7,127 |
17,386 |
|
Federal agencies [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(4) |
(7) |
| Less than 12 months, Fair Value |
2,247 |
2,392 |
| 12 months or more, Gross Unrealized Losses |
0 |
(3) |
| 12 months or more, Fair Value |
0 |
627 |
| Total Gross Unrealized Losses |
(4) |
(10) |
| Total, Fair Value |
2,247 |
3,019 |
|
Residential [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(4) |
(80) |
| Less than 12 months, Fair Value |
261 |
3,780 |
| 12 months or more, Gross Unrealized Losses |
(45) |
(334) |
| 12 months or more, Fair Value |
1,564 |
3,440 |
| Total Gross Unrealized Losses |
(49) |
(414) |
| Total, Fair Value |
1,825 |
7,220 |
|
Commercial [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(6) |
(157) |
| Less than 12 months, Fair Value |
491 |
3,183 |
| 12 months or more, Gross Unrealized Losses |
(262) |
(771) |
| 12 months or more, Fair Value |
2,564 |
3,964 |
| Total Gross Unrealized Losses |
(268) |
(928) |
| Total, Fair Value |
3,055 |
7,147 |
|
Corporate debt securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(14) |
(205) |
| Less than 12 months, Fair Value |
1,217 |
8,107 |
| 12 months or more, Gross Unrealized Losses |
(55) |
(81) |
| 12 months or more, Fair Value |
305 |
167 |
| Total Gross Unrealized Losses |
(69) |
(286) |
| Total, Fair Value |
1,522 |
8,274 |
|
Collateralized debt obligations [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(2) |
(150) |
| Less than 12 months, Fair Value |
1,485 |
4,268 |
| 12 months or more, Gross Unrealized Losses |
(93) |
(199) |
| 12 months or more, Fair Value |
798 |
613 |
| Total Gross Unrealized Losses |
(95) |
(349) |
| Total, Fair Value |
2,283 |
4,881 |
|
Other Debt Securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(11) |
(55) |
| Less than 12 months, Fair Value |
2,153 |
3,002 |
| 12 months or more, Gross Unrealized Losses |
(65) |
(170) |
| 12 months or more, Fair Value |
1,010 |
841 |
| Total Gross Unrealized Losses |
(76) |
(225) |
| Total, Fair Value |
3,163 |
3,843 |
|
Equity Securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(12) |
(22) |
| Less than 12 months, Fair Value |
164 |
377 |
| 12 months or more, Gross Unrealized Losses |
(37) |
(41) |
| 12 months or more, Fair Value |
538 |
530 |
| Total Gross Unrealized Losses |
(49) |
(63) |
| Total, Fair Value |
702 |
907 |
|
Perpetual preferred securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(3) |
(13) |
| Less than 12 months, Fair Value |
116 |
316 |
| 12 months or more, Gross Unrealized Losses |
(37) |
(41) |
| 12 months or more, Fair Value |
538 |
530 |
| Total Gross Unrealized Losses |
(40) |
(54) |
| Total, Fair Value |
654 |
846 |
|
Other equity securities [Member]
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
| Less than 12 months, Gross Unrealized Losses |
(9) |
(9) |
| Less than 12 months, Fair Value |
48 |
61 |
| 12 months or more, Gross Unrealized Losses |
0 |
0 |
| 12 months or more, Fair Value |
0 |
0 |
| Total Gross Unrealized Losses |
(9) |
(9) |
| Total, Fair Value |
$ 48 |
$ 61 |