Securitizations and Other Variable Interest Entities (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2012
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Dec. 31, 2011
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Variable Interest Entity [Line Items] | ||||||||||
Total retained securities | $ 599,752 | $ 556,463 | ||||||||
Prime [Member] | Unconsolidated VIEs
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Variable Interest Entity [Line Items] | ||||||||||
Maximum loss exposure | 11 | [1] | 16 | [1] | ||||||
Prime [Member] | Unconsolidated VIEs | Senior securities held [Member]
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Variable Interest Entity [Line Items] | ||||||||||
Trading assets | 3 | 1 | ||||||||
Prime [Member] | Unconsolidated VIEs | Subordinate securities held [Member]
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Variable Interest Entity [Line Items] | ||||||||||
Trading assets | 0 | 0 | ||||||||
Residual interests held | 2 | 8 | ||||||||
Total retained securities | 5 | [2] | 9 | [2] | ||||||
Principal balance outstanding | 199 | [3] | 191 | [3] | ||||||
Subprime [Member] | Unconsolidated VIEs
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Variable Interest Entity [Line Items] | ||||||||||
Maximum loss exposure | 47 | [1] | 52 | [1] | ||||||
Subprime [Member] | Unconsolidated VIEs | Senior securities held [Member]
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Variable Interest Entity [Line Items] | ||||||||||
Trading assets | 2 | 2 | ||||||||
Subprime [Member] | Unconsolidated VIEs | Subordinate securities held [Member]
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Variable Interest Entity [Line Items] | ||||||||||
Trading assets | 2 | 8 | ||||||||
Residual interests held | 0 | 0 | ||||||||
Total retained securities | 4 | [2] | 10 | [2] | ||||||
Principal balance outstanding | 6,004 | [3] | 6,192 | [3] | ||||||
Commercial Mortgage [Member] | Unconsolidated VIEs
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Variable Interest Entity [Line Items] | ||||||||||
Maximum loss exposure | 100 | [1] | 130 | [1] | ||||||
Commercial Mortgage [Member] | Unconsolidated VIEs | Senior securities held [Member]
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Variable Interest Entity [Line Items] | ||||||||||
Trading assets | 7 | 19 | ||||||||
Commercial Mortgage [Member] | Unconsolidated VIEs | Subordinate securities held [Member]
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Variable Interest Entity [Line Items] | ||||||||||
Trading assets | 5 | 1 | ||||||||
Residual interests held | 24 | 42 | ||||||||
Total retained securities | 36 | [2] | 62 | [2] | ||||||
Principal balance outstanding | $ 19,499 | [3] | $ 24,545 | [3] | ||||||
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