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Loans and Allowance for Credit Losses, Loans by Loan to Value Ratio, Consumer (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2008
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|---|---|---|---|---|---|
| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| Purchased Credit Impaired Loans (carrying value) | $ 30,968 | $ 36,719 | $ 41,430 | $ 51,705 | $ 58,797 |
| Loans | 799,574 | 769,631 | 757,267 | 782,770 | 864,830 |
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Residential Mortgage [Member]
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| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| Purchased Credit Impaired Loans (carrying value) | 26,991 | 29,952 | |||
| Loans | 325,365 | 314,885 | |||
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Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
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| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| 0-60% | 68,417 | 59,170 | |||
| 60.01-80% | 84,927 | 62,553 | |||
| 80.01-100% | 52,868 | 57,054 | |||
| 100.01-120% | 30,580 | 36,945 | |||
| Greater than 120% | 28,139 | 37,234 | |||
| No LTV/CLTV Available | 3,724 | 5,422 | |||
| Government insured/guaranteed loans | 29,719 | 26,555 | |||
| Loans, excluding Purchased Credit Impaired Loans | 298,374 | 284,933 | |||
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Real estate 1-4 family first mortgage [Member]
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| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| Purchased Credit Impaired Loans (carrying value) | 26,839 | 29,746 | 33,245 | 38,386 | 39,214 |
| Loans | 249,900 | 228,894 | 230,235 | 229,536 | 247,894 |
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Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
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| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| 0-60% | 56,247 | 46,476 | |||
| 60.01-80% | 69,759 | 46,831 | |||
| 80.01-100% | 34,830 | 36,764 | |||
| 100.01-120% | 17,004 | 21,116 | |||
| Greater than 120% | 13,529 | 18,608 | |||
| No LTV/CLTV Available | 1,973 | 2,798 | |||
| Government insured/guaranteed loans | 29,719 | 26,555 | |||
| Loans, excluding Purchased Credit Impaired Loans | 223,061 | 199,148 | |||
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Real estate 1-4 family junior lien mortgage [Member]
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| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| Purchased Credit Impaired Loans (carrying value) | 152 | 206 | 250 | 331 | 728 |
| Loans | 75,465 | 85,991 | 96,149 | 103,708 | 110,164 |
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Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
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| Loans by Loan to Value, Excluding Purchased Credit Impaired Loans [Abstract] | |||||
| 0-60% | 12,170 | 12,694 | |||
| 60.01-80% | 15,168 | 15,722 | |||
| 80.01-100% | 18,038 | 20,290 | |||
| 100.01-120% | 13,576 | 15,829 | |||
| Greater than 120% | 14,610 | 18,626 | |||
| No LTV/CLTV Available | 1,751 | 2,624 | |||
| Government insured/guaranteed loans | 0 | 0 | |||
| Loans, excluding Purchased Credit Impaired Loans | $ 75,313 | $ 85,785 |