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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	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Servicing Asset	$ 2,762.9	$ 2,466.3
Debt service account (Restricted cash)	35.1		$ 35.8
Unamortized debt issuance costs	(34.1)	(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	941.9	814.9
Debt service account (Restricted cash)	0.2	1.8
Short-Term Debt	605.0	440.7
Unamortized debt issuance costs	$ 0.0	$ (0.1)

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Debt Service Accounts

+ References

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
-Topic 860
-SubTopic 20
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- Definition

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
-Topic 820
-SubTopic 10
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- Definition

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.

+ References

No definition available.

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