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Loans Held for Sale - Summary of Activity in Balance of Loans Held for Sale, at Fair Value (Footnote) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans held for sale, at fair value | $ 617.8 | $ 917.5 | $ 366.4 | $ 208.8
Repurchased Ginnie Mae Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans held for sale, at fair value | $ 32.1 | $ 220.9 | $ 51.1 |

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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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- Definition Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. + References No definition available. + Details
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- Details
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