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Securitizations and Variable Interests Entities - Schedule of Carrying Amounts of Assets that Relate to Continuing Involvement with Transferred Forward Loans (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
UPB of loans transferred | $ 37,571.1 | $ 31,864.8
Maximum exposure to loss (2) | 38,171.2 | 32,376.8
Ginnie Mae |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
UPB of loans transferred | 6,800.0 | 5,600.0
Mortgage Servicing Rights |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Carrying value of assets | 524.3 | 360.8
Advances |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Carrying value of assets | $ 75.9 | $ 151.2

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- Definition Maximum exposure to loss related to continuing involvement with forward loans that have been transferred with servicing rights retained as well as standard representations and warranties obligations. + References No definition available. + Details
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- Definition Unpaid principal balance of forward loans transferred with servicing rights retained. + References No definition available. + Details
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- Definition The carrying amount (fair value) as of the balance sheet date of the transferor's interests in transferred financial assets (typically securitized receivables, generally not involved in the collection of principal) following transfer of significant portions of such financial instruments to other parties. Such interests could be ancillary cash flows and interest-only strips. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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