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Long-Term Borrowings and Other Secured Financings (Other Secured Financings) (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2012
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Dec. 31, 2011
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| Other secured financings | $ 17,323 | [1] | $ 20,719 | [1] | ||||
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Original Maturities Greater than One Year
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| Other secured financings | 16,400 | 18,696 | ||||||
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Original Maturities One Year or Less
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| Other secured financings | 213 | 275 | ||||||
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Failed Sales
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| Other secured financings | 710 | [2] | 1,748 | [2] | ||||
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Fair Value
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| Other secured financings | $ 9,236 | $ 14,594 | ||||||
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