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Reverse Mortgages - Schedule of Reverse Mortgage Revenue, Net (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Nov. 01, 2024	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Receivables [Abstract]
Acquisition	$ 2,900.0
Loans Held For Investment, Reverse Mortgages, Acquisitions, Cash Amount	20.0
Loans Held For Investment, Reverse Mortgages, UPB	$ 14.2
Gain on new originations		$ 5.3	$ 5.1	$ 11.1	$ 11.0
Net interest income (servicing fee)		8.0	6.1	16.4	12.0
Other change in fair value of securitized loans held for investment and HMBS-related borrowings, net		(2.2)	(3.3)	6.4	(0.7)
Change in fair value included in earnings, net		11.2	7.9	33.9	22.4
Loan fees and other		0.7	0.6	1.8	1.5
Gain on reverse loans held for investment and HMBS-related borrowings, net		11.9	8.5	35.7	23.9
Change in fair value		172.5	150.9	374.6	334.4
Change in fair value		$ (161.3)	$ (143.0)	$ (340.7)	$ (312.0)

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Change in fair value related to home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

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Amount of gain (loss) recognized in income from asset and liability measured at fair value on recurring basis using unobservable input (level 3).

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of interest and fee income from loans classified as other.

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