|
Securities - Gross Unrealized Losses (Details) (USD $)
|
Mar. 31, 2012
Securities
|
Dec. 31, 2011
Securities
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
$ 73,282,000,000
|
[1] |
$ 25,233,000,000
|
[1] |
| Less than Twelve Months, Gross Unrealized Losses |
(651,000,000)
|
[1] |
(344,000,000)
|
[1] |
| Twelve Months or Longer, Fair Value |
43,069,000,000
|
[1] |
48,555,000,000
|
[1] |
| Twelve Months or Longer, Gross Unrealized Losses |
(1,178,000,000)
|
[1] |
(1,346,000,000)
|
[1] |
| Total, Fair Value |
116,351,000,000
|
[1] |
73,788,000,000
|
[1] |
| Total, Gross Unrealized Losses |
(1,829,000,000)
|
[1] |
(1,690,000,000)
|
[1] |
| Table Details [Abstract] |
|
|
|
|
| Number of Available for Sale Securities Amortized Cost Exceeds Fair Value |
4,200
|
|
3,800
|
|
| Available for Sale Securities Amortized Cost Exceeding Fair Value |
(1,800,000,000)
|
|
(1,700,000,000)
|
|
|
Temporarily Impaired [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
73,222,000,000
|
|
25,075,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(637,000,000)
|
|
(316,000,000)
|
|
| Twelve Months or Longer, Fair Value |
42,763,000,000
|
|
48,066,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(1,164,000,000)
|
|
(1,301,000,000)
|
|
| Total, Fair Value |
115,985,000,000
|
|
73,141,000,000
|
|
| Total, Gross Unrealized Losses |
(1,801,000,000)
|
|
(1,617,000,000)
|
|
|
Temporarily Impaired [Member] | Debt Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
73,222,000,000
|
|
25,044,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(637,000,000)
|
|
(315,000,000)
|
|
| Twelve Months or Longer, Fair Value |
42,756,000,000
|
|
48,060,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(1,159,000,000)
|
|
(1,295,000,000)
|
|
| Total, Fair Value |
115,978,000,000
|
|
73,104,000,000
|
|
| Total, Gross Unrealized Losses |
(1,796,000,000)
|
|
(1,610,000,000)
|
|
|
Temporarily Impaired [Member] | Taxable Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
72,513,000,000
|
|
23,927,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(628,000,000)
|
|
(290,000,000)
|
|
| Twelve Months or Longer, Fair Value |
40,840,000,000
|
|
45,306,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(1,111,000,000)
|
|
(1,230,000,000)
|
|
| Total, Fair Value |
113,353,000,000
|
|
69,233,000,000
|
|
| Total, Gross Unrealized Losses |
(1,739,000,000)
|
|
(1,520,000,000)
|
|
|
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 |
847,000,000
|
|
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(4,000,000)
|
|
|
|
| Twelve Months or Longer, Fair Value |
35,464,000,000
|
|
38,269,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(870,000,000)
|
|
(811,000,000)
|
|
| Total, Fair Value |
36,311,000,000
|
|
38,269,000,000
|
|
| Total, Gross Unrealized Losses |
(874,000,000)
|
|
(811,000,000)
|
|
|
Temporarily Impaired [Member] | Agency Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
52,479,000,000
|
|
4,679,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(411,000,000)
|
|
(13,000,000)
|
|
| Twelve Months or Longer, Fair Value |
426,000,000
|
|
474,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(10,000,000)
|
|
(8,000,000)
|
|
| Total, Fair Value |
52,905,000,000
|
|
5,153,000,000
|
|
| Total, Gross Unrealized Losses |
(421,000,000)
|
|
(21,000,000)
|
|
|
Temporarily Impaired [Member] | Collateralized Mortgage Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
10,223,000,000
|
|
11,448,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(121,000,000)
|
|
(134,000,000)
|
|
| Twelve Months or Longer, Fair Value |
933,000,000
|
|
976,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(24,000,000)
|
|
(33,000,000)
|
|
| Total, Fair Value |
11,156,000,000
|
|
12,424,000,000
|
|
| Total, Gross Unrealized Losses |
(145,000,000)
|
|
(167,000,000)
|
|
|
Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
1,520,000,000
|
|
2,112,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(33,000,000)
|
|
(59,000,000)
|
|
| Twelve Months or Longer, Fair Value |
2,469,000,000
|
|
3,950,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(167,000,000)
|
|
(350,000,000)
|
|
| Total, Fair Value |
3,989,000,000
|
|
6,062,000,000
|
|
| Total, Gross Unrealized Losses |
(200,000,000)
|
|
(409,000,000)
|
|
|
Temporarily Impaired [Member] | Commercial Mortgage Backed Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
39,000,000
|
|
55,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(1,000,000)
|
|
(1,000,000)
|
|
| Total, Fair Value |
39,000,000
|
|
55,000,000
|
|
| Total, Gross Unrealized Losses |
(1,000,000)
|
|
(1,000,000)
|
|
|
Temporarily Impaired [Member] | Foreign Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
1,110,000,000
|
|
1,008,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(16,000,000)
|
|
(13,000,000)
|
|
| Twelve Months or Longer, Fair Value |
159,000,000
|
|
165,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(2,000,000)
|
|
(1,000,000)
|
|
| Total, Fair Value |
1,269,000,000
|
|
1,173,000,000
|
|
| Total, Gross Unrealized Losses |
(18,000,000)
|
|
(14,000,000)
|
|
|
Temporarily Impaired [Member] | Corporate Bond Securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
247,000,000
|
|
415,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(19,000,000)
|
|
(29,000,000)
|
|
| Twelve Months or Longer, Fair Value |
90,000,000
|
|
111,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(9,000,000)
|
|
(8,000,000)
|
|
| Total, Fair Value |
337,000,000
|
|
526,000,000
|
|
| Total, Gross Unrealized Losses |
(28,000,000)
|
|
(37,000,000)
|
|
|
Temporarily Impaired [Member] | Other Debt Obligations [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
6,048,000,000
|
|
4,210,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(23,000,000)
|
|
(41,000,000)
|
|
| Twelve Months or Longer, Fair Value |
1,299,000,000
|
|
1,361,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(29,000,000)
|
|
(19,000,000)
|
|
| Total, Fair Value |
7,347,000,000
|
|
5,571,000,000
|
|
| Total, Gross Unrealized Losses |
(52,000,000)
|
|
(60,000,000)
|
|
|
Temporarily Impaired [Member] | Tax-exempt securities [Member]
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
709,000,000
|
|
1,117,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
(9,000,000)
|
|
(25,000,000)
|
|
| Twelve Months or Longer, Fair Value |
1,916,000,000
|
|
2,754,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(48,000,000)
|
|
(65,000,000)
|
|
| Total, Fair Value |
2,625,000,000
|
|
3,871,000,000
|
|
| Total, Gross Unrealized Losses |
(57,000,000)
|
|
(90,000,000)
|
|
|
Temporarily Impaired [Member] | Equity Securities
|
|
|
|
|
| Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] |
|
|
|
|
| Less than Twelve Months, Fair Value |
0
|
|
31,000,000
|
|
| Less than Twelve Months, Gross Unrealized Losses |
0
|
|
(1,000,000)
|
|
| Twelve Months or Longer, Fair Value |
7,000,000
|
|
6,000,000
|
|
| Twelve Months or Longer, Gross Unrealized Losses |
(5,000,000)
|
|
(6,000,000)
|
|
| Total, Fair Value |
7,000,000
|
|
37,000,000
|
|
| Total, Gross Unrealized Losses |
(5,000,000)
|
|
(7,000,000)
|
|
|
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 |
60,000,000
|
[2] |
158,000,000
|
[2] |
| Less than Twelve Months, Gross Unrealized Losses |
14,000,000
|
[2] |
28,000,000
|
[2] |
| Twelve Months or Longer, Fair Value |
306,000,000
|
[2] |
489,000,000
|
[2] |
| Twelve Months or Longer, Gross Unrealized Losses |
14,000,000
|
[2] |
45,000,000
|
[2] |
| Total, Fair Value |
366,000,000
|
[2] |
647,000,000
|
[2] |
| Total, Gross Unrealized Losses |
$ 28,000,000
|
[2] |
$ 73,000,000
|
[2] |
|
|
|