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Mortgage Servicing - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jun. 01, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Servicing Asset at Amortized Cost [Line Items] |  |  |  |
UPB of portfolio loans acquired | $ 46,800.0 | $ 15,700.0 | $ 75,600.0 | $ 31,700.0
Float balances |  | 1,540.0 | 2,070.0 | 1,740.0
Purchase of MSRs | $ 575.3 | 181.6 | 844.1 | 285.1
Agency and Non-Agency Mortgage Servicing Rights |  |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |  |
UPB of MSRs sold |  | $ 11,700.0 | $ 32.0 | $ 80.0

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- Definition The fair value of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 + Details
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- Definition Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Footnote 6)) -URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 + Details
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