|
Securities - Amortized Cost, Gains and Losses, and Fair Value (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
|
|
|
Mar. 31, 2012
|
Mar. 31, 2011
|
Dec. 31, 2011
|
Dec. 31, 2010
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Amortized Cost |
|
|
|
$ 271,172
|
|
|
| AFS Debt Securities |
297,040
|
|
|
276,151
|
|
|
| Held-to-maturity debt securities, Amortized Cost |
34,205
|
[1] |
|
35,265
|
|
|
| Held-to-maturity Securities, Unrecognized Holding Gain |
246
|
[1] |
|
181
|
[1] |
|
| Held-to-maturity Securities, Unrecognized Holding Loss |
(11)
|
[1] |
|
(4)
|
[1] |
|
| Held-to-maturity Securities, Fair Value |
34,440
|
|
|
35,442
|
|
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| Total Debt Securities Amortized Cost |
327,761
|
|
|
306,437
|
|
|
| Total Debt Securities Gross Unrealized Gains |
5,554
|
|
|
6,843
|
|
|
| Total Debt Securities Gross Unrealized Losses |
(1,835)
|
|
|
(1,687)
|
|
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| Debt Securities, Fair Value |
331,480
|
|
|
311,593
|
|
|
| In Text Details [Abstract] |
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax |
2,200
|
|
|
|
|
|
| Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax |
1,300
|
|
|
|
|
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| Nonperforming Debt Securities |
110
|
|
|
140
|
|
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| Gross gains recorded in OCI |
3
|
|
10
|
|
|
|
|
Debt [Member]
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|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
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| Available-for-sale Securities, Gross Unrealized Gains |
5,308
|
|
|
6,662
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(1,824)
|
|
|
(1,683)
|
|
|
| In Text Details [Abstract] |
|
|
|
|
|
|
| Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax |
2,162
|
|
65
|
3,100
|
|
714
|
| Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax |
291
|
|
216
|
|
|
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|
Taxable Securities [Member]
|
|
|
|
|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Amortized Cost |
289,862
|
|
|
266,494
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
5,292
|
|
|
6,647
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(1,767)
|
|
|
(1,593)
|
|
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| AFS Debt Securities |
293,387
|
|
|
271,548
|
|
|
|
United States Treasury And Agency Securities [Member]
|
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|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
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| Available-for-sale Securities, Amortized Cost |
40,609
|
|
|
43,433
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
231
|
|
|
242
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(874)
|
|
|
(811)
|
|
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| AFS Debt Securities |
39,966
|
|
|
42,864
|
|
|
|
Agency Securities [Member]
|
|
|
|
|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Amortized Cost |
172,335
|
|
|
138,073
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
3,177
|
|
|
4,511
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(421)
|
|
|
(21)
|
|
|
| AFS Debt Securities |
175,091
|
|
|
142,563
|
|
|
|
Collateralized Mortgage Obligations [Member]
|
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|
|
|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
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| Available-for-sale Securities, Amortized Cost |
41,698
|
|
|
44,392
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
802
|
|
|
774
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(145)
|
|
|
(167)
|
|
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| AFS Debt Securities |
42,355
|
|
|
44,999
|
|
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|
Residential Mortgage Backed Securities [Member]
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|
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| Debt and Marketable Equity Securities [Abstract] |
|
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|
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| Available-for-sale Securities, Amortized Cost |
11,398
|
[2] |
|
14,948
|
[2] |
|
| Available-for-sale Securities, Gross Unrealized Gains |
300
|
[2] |
|
301
|
[2] |
|
| Available-for-sale Securities, Gross Unrealized Losses |
(228)
|
[2] |
|
(482)
|
[2] |
|
| AFS Debt Securities |
11,470
|
[2] |
|
14,767
|
[2] |
|
|
Residential Mortgage Backed Securities [Member] | Prime Loan [Member]
|
|
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|
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| Table Details [Abstract] |
|
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| Available-for-sale Securities, Debt Maturities, Percent Held by Rating |
92.00%
|
|
|
89.00%
|
|
|
|
Residential Mortgage Backed Securities [Member] | Alt-A Loan [Member]
|
|
|
|
|
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| Table Details [Abstract] |
|
|
|
|
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| Available-for-sale Securities, Debt Maturities, Percent Held by Rating |
6.00%
|
|
|
9.00%
|
|
|
|
Residential Mortgage Backed Securities [Member] | Subprime Loan [Member]
|
|
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|
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| Table Details [Abstract] |
|
|
|
|
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| Available-for-sale Securities, Debt Maturities, Percent Held by Rating |
2.00%
|
|
|
2.00%
|
|
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|
Commercial Mortgage Backed Securities [Member]
|
|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
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| Available-for-sale Securities, Amortized Cost |
4,333
|
|
|
4,894
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
567
|
|
|
629
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(1)
|
|
|
(1)
|
|
|
| AFS Debt Securities |
4,899
|
|
|
5,522
|
|
|
|
Non United States Securities [Member]
|
|
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|
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| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
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| Available-for-sale Securities, Amortized Cost |
|
|
|
4,872
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
56
|
|
|
62
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(18)
|
|
|
(14)
|
|
|
| AFS Debt Securities |
|
|
|
4,920
|
|
|
|
Corporate Bond Securities [Member]
|
|
|
|
|
|
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Amortized Cost |
2,364
|
|
|
2,993
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
85
|
|
|
79
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(28)
|
|
|
(37)
|
|
|
| AFS Debt Securities |
2,421
|
|
|
3,035
|
|
|
|
Other Debt Obligations [Member]
|
|
|
|
|
|
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Amortized Cost |
10,595
|
|
|
12,889
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
74
|
|
|
49
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(52)
|
|
|
(60)
|
|
|
| AFS Debt Securities |
10,617
|
|
|
12,878
|
|
|
|
Tax-exempt securities [Member]
|
|
|
|
|
|
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Amortized Cost |
3,694
|
|
|
4,678
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
16
|
|
|
15
|
|
|
| Available-for-sale Securities, Gross Unrealized Losses |
(57)
|
|
|
(90)
|
|
|
| AFS Debt Securities |
3,653
|
|
|
4,603
|
|
|
|
Equity securities [Member]
|
|
|
|
|
|
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Available-for-sale Securities, Gross Unrealized Gains |
28
|
[3] |
|
10
|
[3] |
|
| Available-for-sale Securities, Gross Unrealized Losses |
(5)
|
[3] |
|
(7)
|
[3] |
|
| Available-for-sale Equity Securities, Amortized Cost Basis |
64
|
[3] |
|
65
|
[3] |
|
| Available-for-sale Securities, Equity Securities |
87
|
|
|
68
|
|
|
|
Portion at Fair Value, Fair Value Disclosure [Member]
|
|
|
|
|
|
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Held-to-maturity debt securities, Amortized Cost |
34,440
|
|
|
35,442
|
|
|
|
Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
|
|
|
|
| Debt and Marketable Equity Securities [Abstract] |
|
|
|
|
|
|
| Held-to-maturity debt securities, Amortized Cost |
|
|
|
$ 35,265
|
|
|
|
|
|