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Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	$ 2,223.6	$ 2,327.7	$ 2,272.2	$ 2,675.7	$ 2,665.2
Assets serviced	159,500.0		169,700.0
UPB of loans transferred	45,658.4		46,810.1
Owned MSRs
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	1,630.0		1,604.6
Assets serviced	118,900.0		122,700.0
MAV Transferred MSRs
Servicing Assets at Fair Value [Line Items]
MSRs, at fair value	337.4		422.8
Assets serviced	$ 21,900.0		$ 28,800.0

X

- 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.

+ References

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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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- 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

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