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Securitizations and Variable Interest Entities, Key Economic Assumptions - Mortgage Servicing Assets (Details)
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12 Months Ended | |
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Dec. 31, 2011
years
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Dec. 31, 2010
years
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| Securitizations and Variable Interest Entities [Abstract] | ||
| Prepayment speed (annual CPR) | 12.80% | 13.50% |
| Life (in years) | 5.9 | 5.4 |
| Discount rate | 7.70% | 8.00% |
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- Definition
The discount rate which is used to value residual cash flows generated by financial assets of the securitization, asset-backed financing arrangement, or similar transfer. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's assets obtained or liabilities incurred, if any, at the time of securitization, asset-backed financing, or similar transfer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Estimated speed of prepayments of principal on financial assets. This is used as a key assumption in measuring the fair value of assets obtained or liabilities incurred that relate to a transferor's continuing involvement, if any, at the time of securitization, asset-backed financing, or similar transfer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average life of securitized assets. This is used as a key input and assumption in measuring the fair value of assets obtained or liabilities incurred that relate to a transferor's continuing involvement, if any, at the time of securitization, asset-backed financing, or similar transfer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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