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Reverse Mortgages - Schedule of Reverse Mortgage Revenue, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Receivables [Abstract]
Gain on new originations	$ 5.1	$ 4.2	$ 11.0	$ 10.5
Net interest income (servicing fee)	6.1	5.8	12.0	11.7
Other change in fair value of securitized loans held for investment and HMBS-related borrowings, net (3)	(3.3)	(9.9)	(0.7)	(1.8)
Change in fair value included in earnings, net	7.9	0.1	22.4	20.5
Loan fees and other	0.6	0.7	1.5	1.5
Gain on reverse loans held for investment and HMBS-related borrowings, net	$ 8.5	$ 0.7	$ 23.9	$ 21.9

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Fee and Commissions, Reverse Mortgage Banking

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Loands Held For Investment, Reverse Mortgage, Other Change In Fair Value

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Net interest income (servicing fee) - Reverse mortgages

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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A gain (loss) realized on a transfer, accounted for as a sale, of all or a portion of financial assets in which the transferor surrenders control and receives consideration other than a beneficial interest in the assets transferred. Reflects the amount of sales proceeds in excess of, or deficient from, the sum of the carrying amounts of transferred financial assets plus transaction costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-3

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Reference 3: 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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