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Securitizations and Variable Interest Entities (Details) (USD $)
In Millions, unless otherwise specified |
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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Dec. 31, 2007
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| Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities | |||||||||||
| Cash and due from banks at end of year | $ 19,440 | $ 16,044 | $ 27,080 | $ 23,763 | |||||||
| Trading assets | 77,814 | 51,414 | |||||||||
| Securities available for sale | 222,613 | 172,654 | |||||||||
| Mortgages held for sale | 48,357 | 51,763 | |||||||||
| Loans held for sale net | 49,695 | 53,053 | |||||||||
| Loans | 769,631 | 757,267 | 782,770 | 864,830 | 382,195 | ||||||
| MSRs (carried at fair value) | 12,603 | 14,467 | |||||||||
| Other assets | 101,022 | 99,781 | |||||||||
| Total assets | 1,313,867 | [1] | 1,258,128 | [1] | |||||||
| Short-term borrowings, Amount | 49,091 | 55,401 | 38,966 | ||||||||
| Accrued expenses and other liabilities | 77,665 | 69,913 | |||||||||
| Long-term debt | 125,354 | 156,983 | |||||||||
| Total liabilities | 1,172,180 | [2] | 1,130,239 | [2] | |||||||
| Noncontrolling interests | 1,446 | 1,481 | |||||||||
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VIEs that we do not consolidate [Member]
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| Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities | |||||||||||
| Cash and due from banks at end of year | 0 | 0 | |||||||||
| Trading assets | 3,723 | 5,351 | |||||||||
| Securities available for sale | 21,708 | 24,001 | |||||||||
| Mortgages held for sale | 0 | 0 | |||||||||
| Loans | 11,404 | 12,401 | |||||||||
| MSRs (carried at fair value) | 12,080 | 13,261 | |||||||||
| Other assets | 4,494 | 3,783 | |||||||||
| Total assets | 53,409 | 58,797 | |||||||||
| Short-term borrowings, Amount | 0 | 0 | |||||||||
| Accrued expenses and other liabilities | 3,350 | 3,514 | |||||||||
| Long-term debt | 0 | 0 | |||||||||
| Total liabilities | 3,350 | 3,514 | |||||||||
| Noncontrolling interests | 0 | 0 | |||||||||
| Net assets | 50,059 | 55,283 | |||||||||
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VIEs that we consolidate [Member]
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| Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities | |||||||||||
| Cash and due from banks at end of year | 321 | 200 | |||||||||
| Trading assets | 293 | 143 | |||||||||
| Securities available for sale | 3,332 | 2,159 | |||||||||
| Mortgages held for sale | 444 | 634 | |||||||||
| Loans | 11,967 | 16,708 | |||||||||
| MSRs (carried at fair value) | 0 | 0 | |||||||||
| Other assets | 1,858 | 2,071 | |||||||||
| Total assets | 18,215 | 21,915 | |||||||||
| Short-term borrowings, Amount | 3,450 | 3,636 | |||||||||
| Accrued expenses and other liabilities | 1,138 | 743 | |||||||||
| Long-term debt | 4,932 | 8,377 | |||||||||
| Total liabilities | 9,520 | 12,756 | |||||||||
| Noncontrolling interests | 61 | 94 | |||||||||
| Net assets | 8,634 | 9,065 | |||||||||
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Transfers that we account for as secured borrowings [Member]
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| Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities | |||||||||||
| Cash and due from banks at end of year | 11 | 398 | |||||||||
| Trading assets | 30 | 32 | |||||||||
| Securities available for sale | 11,671 | 7,834 | |||||||||
| Mortgages held for sale | 0 | 0 | |||||||||
| Loans | 7,181 | 1,613 | |||||||||
| MSRs (carried at fair value) | 0 | 0 | |||||||||
| Other assets | 137 | 90 | |||||||||
| Total assets | 19,030 | 9,967 | |||||||||
| Short-term borrowings, Amount | 10,682 | 7,773 | |||||||||
| Accrued expenses and other liabilities | 121 | 14 | |||||||||
| Long-term debt | 6,686 | 1,700 | |||||||||
| Total liabilities | 17,489 | 9,487 | |||||||||
| Noncontrolling interests | 0 | 0 | |||||||||
| Net assets | 1,541 | 480 | |||||||||
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Total VIE [Member]
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| Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities | |||||||||||
| Cash and due from banks at end of year | 332 | 598 | |||||||||
| Trading assets | 4,046 | 5,526 | |||||||||
| Securities available for sale | 36,711 | 33,994 | |||||||||
| Mortgages held for sale | 444 | 634 | |||||||||
| Loans | 30,552 | 30,722 | |||||||||
| MSRs (carried at fair value) | 12,080 | 13,261 | |||||||||
| Other assets | 6,489 | 5,944 | |||||||||
| Total assets | 90,654 | 90,679 | |||||||||
| Short-term borrowings, Amount | 14,132 | 11,409 | |||||||||
| Accrued expenses and other liabilities | 4,609 | 4,271 | |||||||||
| Long-term debt | 11,618 | 10,077 | |||||||||
| Total liabilities | 30,359 | 25,757 | |||||||||
| Noncontrolling interests | 61 | 94 | |||||||||
| Net assets | $ 60,234 | $ 64,828 | |||||||||
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