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Fair Value, Changes in Fair Value of Assets Recorded at Fair Value on Nonrecurring Basis (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2011
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Dec. 31, 2010
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|
| Fair Value Assets Measured On Nonrecurring Basis Increase Decrease [Line Items] | ||
| Mortgages held for sale | $ 29 | $ (20) |
| Loans held for sale | 22 | (1) |
| Loans | (5,948) | (8,187) |
| Mortgage servicing rights (amortized) | (34) | (3) |
| Other Assets | (256) | (301) |
| Total | (6,187) | (8,512) |
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Total Commercial [Member]
|
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| Fair Value Assets Measured On Nonrecurring Basis Increase Decrease [Line Items] | ||
| Loans | (1,043) | (1,306) |
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Total Consumer [Member]
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| Fair Value Assets Measured On Nonrecurring Basis Increase Decrease [Line Items] | ||
| Loans | $ (4,905) | $ (6,881) |