|
Securities Available for Sale, Contractual Maturities (Details) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
|
Mar. 31, 2013
|
Dec. 31, 2012
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
$ 245,381 |
$ 232,414 |
| Weighted Average Yield Contractual Maturities, Total |
3.78% |
3.91% |
| Due in 1 year, Contractual Maturities |
6,069 |
5,034 |
| Percentage of Weighted Average Yield, Due In 1 year |
2.45% |
2.28% |
| Due in 1-5 years, Contractual Maturities |
34,396 |
36,092 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
2.39% |
2.37% |
| Due in 5-10 years, Contractual Maturities |
27,485 |
28,052 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
3.04% |
3.07% |
| Due in 10 years or More, Contractual Maturities |
177,431 |
163,236 |
| Percentage of Weighted Average Yield, Due After 10 Years |
4.21% |
4.44% |
|
US Treasury and Government [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
6,884 |
7,146 |
| Weighted Average Yield Contractual Maturities, Total |
1.62% |
1.59% |
| Due in 1 year, Contractual Maturities |
386 |
376 |
| Percentage of Weighted Average Yield, Due In 1 year |
0.42% |
0.43% |
| Due in 1-5 years, Contractual Maturities |
498 |
661 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
1.57% |
1.24% |
| Due in 5-10 years, Contractual Maturities |
6,000 |
6,109 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
1.70% |
1.70% |
| Due in 10 years or More, Contractual Maturities |
0 |
0 |
| Percentage of Weighted Average Yield, Due After 10 Years |
0.00% |
0.00% |
|
US States and Political Subdivisions [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
40,456 |
38,676 |
| Weighted Average Yield Contractual Maturities, Total |
5.22% |
5.29% |
| Due in 1 year, Contractual Maturities |
2,050 |
1,861 |
| Percentage of Weighted Average Yield, Due In 1 year |
2.49% |
2.61% |
| Due in 1-5 years, Contractual Maturities |
11,156 |
11,620 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
2.15% |
2.18% |
| Due in 5-10 years, Contractual Maturities |
3,209 |
3,380 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
5.57% |
5.51% |
| Due in 10 years or More, Contractual Maturities |
24,041 |
21,815 |
| Percentage of Weighted Average Yield, Due After 10 Years |
6.82% |
7.15% |
|
Mortgage Backed Securities [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
140,651 |
133,184 |
| Weighted Average Yield Contractual Maturities, Total |
3.96% |
4.12% |
| Due in 1 year, Contractual Maturities |
12 |
1 |
| Percentage of Weighted Average Yield, Due In 1 year |
5.13% |
5.40% |
| Due in 1-5 years, Contractual Maturities |
269 |
184 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
4.54% |
4.37% |
| Due in 5-10 years, Contractual Maturities |
1,629 |
1,814 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
2.93% |
2.95% |
| Due in 10 years or More, Contractual Maturities |
138,741 |
131,185 |
| Percentage of Weighted Average Yield, Due After 10 Years |
3.97% |
4.13% |
|
Federal agencies [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
105,472 |
97,285 |
| Weighted Average Yield Contractual Maturities, Total |
3.64% |
3.82% |
| Due in 1 year, Contractual Maturities |
3 |
1 |
| Percentage of Weighted Average Yield, Due In 1 year |
3.46% |
5.40% |
| Due in 1-5 years, Contractual Maturities |
172 |
106 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
4.97% |
4.87% |
| Due in 5-10 years, Contractual Maturities |
988 |
1,144 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
3.42% |
3.41% |
| Due in 10 years or More, Contractual Maturities |
104,309 |
96,034 |
| Percentage of Weighted Average Yield, Due After 10 Years |
3.64% |
3.83% |
|
Residential [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
15,259 |
15,931 |
| Weighted Average Yield Contractual Maturities, Total |
4.36% |
4.38% |
| 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 |
4 |
0 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
3.14% |
0.00% |
| Due in 5-10 years, Contractual Maturities |
533 |
569 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
2.04% |
2.06% |
| Due in 10 years or More, Contractual Maturities |
14,722 |
15,362 |
| Percentage of Weighted Average Yield, Due After 10 Years |
4.44% |
4.47% |
|
Commercial [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
19,920 |
19,968 |
| Weighted Average Yield Contractual Maturities, Total |
5.34% |
5.33% |
| Due in 1 year, Contractual Maturities |
9 |
0 |
| Percentage of Weighted Average Yield, Due In 1 year |
5.74% |
0.00% |
| Due in 1-5 years, Contractual Maturities |
93 |
78 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
3.81% |
3.69% |
| Due in 5-10 years, Contractual Maturities |
108 |
101 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
2.88% |
2.84% |
| Due in 10 years or More, Contractual Maturities |
19,710 |
19,789 |
| Percentage of Weighted Average Yield, Due After 10 Years |
5.36% |
5.35% |
|
Corporate debt securities [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
21,449 |
21,333 |
| Weighted Average Yield Contractual Maturities, Total |
4.26% |
4.26% |
| Due in 1 year, Contractual Maturities |
1,564 |
1,037 |
| Percentage of Weighted Average Yield, Due In 1 year |
4.07% |
4.29% |
| Due in 1-5 years, Contractual Maturities |
12,373 |
12,792 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
3.23% |
3.19% |
| Due in 5-10 years, Contractual Maturities |
6,159 |
6,099 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
6.04% |
6.14% |
| Due in 10 years or More, Contractual Maturities |
1,353 |
1,405 |
| Percentage of Weighted Average Yield, Due After 10 Years |
5.78% |
5.88% |
|
Collateralized loan and other debt obligations [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
16,663 |
13,188 |
| Weighted Average Yield Contractual Maturities, Total |
1.49% |
1.35% |
| Due in 1 year, Contractual Maturities |
84 |
44 |
| Percentage of Weighted Average Yield, Due In 1 year |
0.63% |
0.96% |
| Due in 1-5 years, Contractual Maturities |
1,065 |
1,246 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
0.80% |
0.71% |
| Due in 5-10 years, Contractual Maturities |
7,246 |
7,376 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
1.09% |
1.01% |
| Due in 10 years or More, Contractual Maturities |
8,268 |
4,522 |
| Percentage of Weighted Average Yield, Due After 10 Years |
1.94% |
2.08% |
|
Other Debt Securities [Member]
|
|
|
| Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |
|
|
| Contractual Maturities,Total |
19,278 |
18,887 |
| Weighted Average Yield Contractual Maturities, Total |
1.74% |
1.85% |
| Due in 1 year, Contractual Maturities |
1,973 |
1,715 |
| Percentage of Weighted Average Yield, Due In 1 year |
1.60% |
1.14% |
| Due in 1-5 years, Contractual Maturities |
9,035 |
9,589 |
| Percentage of Weighted Average Yield, Due in 1-5 Years |
1.70% |
1.75% |
| Due in 5-10 years, Contractual Maturities |
3,242 |
3,274 |
| Percentage of Weighted Average Yield, Due In 5-10 years |
1.74% |
2.11% |
| Due in 10 years or More, Contractual Maturities |
$ 5,028 |
$ 4,309 |
| Percentage of Weighted Average Yield, Due After 10 Years |
1.85% |
2.14% |