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Securitizations and Variable Interest Entities - Carrying Value and Classification of Assets And Liabilities of PLS Notes Facility (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Servicing Asset	$ 2,632.6	$ 2,466.3
Debt service account (Restricted cash)	27.2		$ 27.0
Unamortized debt issuance costs	(24.5)	(35.4)
Secured Debt
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Unamortized debt issuance costs	0.0	(0.1)
Variable Interest Entity, Primary Beneficiary | Secured Debt | Agency and PLS Mortgage Servicing Rights Financing Facility
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Servicing Asset	870.7	814.9
Debt service account (Restricted cash)	0.2	1.8
Short-Term Debt	617.5	440.7
Unamortized debt issuance costs	$ 0.0	$ (0.1)

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No definition available.

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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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