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Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	$ 2,632.6	$ 2,547.4	$ 2,466.3	$ 2,374.7	$ 2,272.2
Assets serviced	181,500.0		170,300.0
UPB of loans transferred	55,313.1		49,641.2
Owned MSRs
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	2,051.8		1,869.6
Assets serviced	142,400.0		129,800.0
MAV Transferred MSRs
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	321.8		330.6
Assets serviced	20,700.0		21,500.0
Financing Liability Excess Servicing Spread [Member]
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	$ 327.8		$ 338.7

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- Definition

Total of property assets serviced as measured by UPB.

+ References

No definition available.

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- Definition

Unpaid principal balance of forward loans transferred with servicing rights retained.

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

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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.

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