|
Securities Available for Sale, Contractual Maturities (Details) (USD $)
In Millions, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2011
|
Dec. 31, 2010
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
$ 219,196 |
$ 167,465 |
| Weighted Average Yield Contractual Maturities, Total |
4.12% |
4.81% |
| Due in 1 year, Contractual Maturities |
1,899 |
2,469 |
| Percentage of Weighted Average Yield, Due In 1 year |
3.85% |
4.12% |
| Due in 1-5 years, Contractual Maturities |
43,305 |
16,165 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
2.36% |
3.72% |
| Due in 5-10 years, Contractual Maturities |
19,665 |
15,477 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
3.31% |
3.63% |
| Due in 10 years or More, Contractual Maturities |
154,327 |
133,354 |
| Percentage of Weighted Average Yield, Due After 10 Years |
4.72% |
5.10% |
|
US Treasury and Government [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
6,968 |
1,604 |
| Weighted Average Yield Contractual Maturities, Total |
0.91% |
2.54% |
| Due in 1 year, Contractual Maturities |
57 |
9 |
| Percentage of Weighted Average Yield, Due In 1 year |
0.48% |
5.07% |
| Due in 1-5 years, Contractual Maturities |
6,659 |
641 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
0.84% |
1.72% |
| Due in 5-10 years, Contractual Maturities |
194 |
852 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
2.73% |
2.94% |
| Due in 10 years or More, Contractual Maturities |
58 |
102 |
| Percentage of Weighted Average Yield, Due After 10 Years |
3.81% |
4.15% |
|
US States and Political Subdivisions [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
32,593 |
18,654 |
| Weighted Average Yield Contractual Maturities, Total |
4.94% |
5.99% |
| Due in 1 year, Contractual Maturities |
520 |
322 |
| Percentage of Weighted Average Yield, Due In 1 year |
3.02% |
3.83% |
| Due in 1-5 years, Contractual Maturities |
11,679 |
3,210 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
2.90% |
3.57% |
| Due in 5-10 years, Contractual Maturities |
2,692 |
1,884 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
5.31% |
6.13% |
| Due in 10 years or More, Contractual Maturities |
17,702 |
13,238 |
| Percentage of Weighted Average Yield, Due After 10 Years |
6.28% |
6.60% |
|
Mortgage Backed Securities [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
132,740 |
115,794 |
| Weighted Average Yield Contractual Maturities, Total |
4.55% |
5.05% |
| Due in 1 year, Contractual Maturities |
1 |
5 |
| Percentage of Weighted Average Yield, Due In 1 year |
6.47% |
6.63% |
| Due in 1-5 years, Contractual Maturities |
442 |
29 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
4.02% |
6.38% |
| Due in 5-10 years, Contractual Maturities |
2,126 |
976 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
2.72% |
4.53% |
| Due in 10 years or More, Contractual Maturities |
130,171 |
114,784 |
| Percentage of Weighted Average Yield, Due After 10 Years |
4.58% |
5.05% |
|
Federal agencies [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
96,754 |
82,037 |
| Weighted Average Yield Contractual Maturities, Total |
4.39% |
5.01% |
| Due in 1 year, Contractual Maturities |
1 |
5 |
| Percentage of Weighted Average Yield, Due In 1 year |
6.47% |
6.63% |
| Due in 1-5 years, Contractual Maturities |
442 |
28 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
4.02% |
6.58% |
| Due in 5-10 years, Contractual Maturities |
1,399 |
420 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
3.07% |
5.23% |
| Due in 10 years or More, Contractual Maturities |
94,912 |
81,584 |
| Percentage of Weighted Average Yield, Due After 10 Years |
4.42% |
5.00% |
|
Residential [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
17,836 |
20,203 |
| Weighted Average Yield Contractual Maturities, Total |
4.51% |
4.98% |
| Due in 1 year, Contractual Maturities |
0 |
0 |
| Percentage of Weighted Average Yield, Due In 1 year |
0.00% |
0.00% |
| Due in 1-5 years, Contractual Maturities |
0 |
0 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
0.00% |
0.00% |
| Due in 5-10 years, Contractual Maturities |
640 |
341 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
1.88% |
3.20% |
| Due in 10 years or More, Contractual Maturities |
17,196 |
19,862 |
| Percentage of Weighted Average Yield, Due After 10 Years |
4.61% |
5.01% |
|
Commercial [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
18,150 |
13,554 |
| Weighted Average Yield Contractual Maturities, Total |
5.40% |
5.39% |
| Due in 1 year, Contractual Maturities |
0 |
0 |
| Percentage of Weighted Average Yield, Due In 1 year |
0.00% |
0.00% |
| Due in 1-5 years, Contractual Maturities |
0 |
1 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
0.00% |
1.38% |
| Due in 5-10 years, Contractual Maturities |
87 |
215 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
3.33% |
5.28% |
| Due in 10 years or More, Contractual Maturities |
18,063 |
13,338 |
| Percentage of Weighted Average Yield, Due After 10 Years |
5.41% |
5.39% |
|
Corporate debt securities [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
18,404 |
10,279 |
| Weighted Average Yield Contractual Maturities, Total |
4.64% |
5.94% |
| Due in 1 year, Contractual Maturities |
815 |
545 |
| Percentage of Weighted Average Yield, Due In 1 year |
5.57% |
7.82% |
| Due in 1-5 years, Contractual Maturities |
11,022 |
3,853 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
3.40% |
6.01% |
| Due in 5-10 years, Contractual Maturities |
4,691 |
4,817 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
6.67% |
5.62% |
| Due in 10 years or More, Contractual Maturities |
1,876 |
1,064 |
| Percentage of Weighted Average Yield, Due After 10 Years |
6.38% |
6.21% |
|
Collateralized debt obligations [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
8,599 |
4,778 |
| Weighted Average Yield Contractual Maturities, Total |
1.10% |
0.80% |
| Due in 1 year, Contractual Maturities |
0 |
0 |
| Percentage of Weighted Average Yield, Due In 1 year |
0.00% |
0.00% |
| Due in 1-5 years, Contractual Maturities |
540 |
545 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
1.61% |
0.88% |
| Due in 5-10 years, Contractual Maturities |
6,813 |
2,581 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
1.00% |
0.72% |
| Due in 10 years or More, Contractual Maturities |
1,246 |
1,652 |
| Percentage of Weighted Average Yield, Due After 10 Years |
1.42% |
0.90% |
|
Other Debt Securities [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
19,892 |
16,356 |
| Weighted Average Yield Contractual Maturities, Total |
1.89% |
2.53% |
| Due in 1 year, Contractual Maturities |
506 |
1,588 |
| Percentage of Weighted Average Yield, Due In 1 year |
2.29% |
2.89% |
| Due in 1-5 years, Contractual Maturities |
12,963 |
7,887 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
1.75% |
3.00% |
| Due in 5-10 years, Contractual Maturities |
3,149 |
4,367 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
2.04% |
2.01% |
| Due in 10 years or More, Contractual Maturities |
$ 3,274 |
$ 2,514 |
| Percentage of Weighted Average Yield, Due After 10 Years |
2.29% |
1.72% |