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Reverse Mortgages - Schedule of Loans Held For Investment and HMBS Related Borrowings (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Nov. 01, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Loans Held for Investment - Reverse Mortgages
Loans Held For Investment, Reverse Mortgages, Unpaid Principal		$ 9,635.0		$ 9,635.0			$ 10,699.5
Loans Held For Investment, Reverse Mortgages, Fair Value Adjustment		482.4		482.4			425.8
Beginning balance		10,470.8	$ 8,222.4	11,125.3	$ 7,970.0
Originations		249.3	284.7	794.8	804.9
Repayments (principal payments received)		(778.3)	(338.8)	(2,341.6)	(937.7)
Loans held for sale, at fair value		(6.1)	(1.0)	(11.8)	(2.9)
Receivables		(1.4)	(0.5)	(6.3)	(1.9)
REO (Other assets)		(0.5)	(0.2)	(0.8)	(0.2)
Other		4.9	(2.7)	4.8	(2.7)
Change in fair value		178.6	162.4	553.1	496.8
Securitized loans (pledged to HMBS-related borrowings)		10,017.3		10,017.3			10,950.8
Unsecuritized loans		100.1		100.1			174.5
Ending balance		10,117.4	8,326.3	10,117.4	8,326.3
HMBS Related Borrowings
Home Equity Conversion Mortgage-Backed Securities (HMBS) related borrowings, at fair value		9,924.6	8,132.5	9,924.6	8,132.5	$ 10,253.1	$ 10,872.1	$ 8,035.4	$ 7,797.3
Securitization of HECM loans accounted for as a financing		(269.3)	(284.6)	(847.0)	(792.3)
Additional proceeds from securitization of HECM loans and tails		(5.9)	(2.2)	(13.0)	(8.6)
Acquisition	$ 2,900.0
Repayments (principal payments received)		770.2	334.8	2,314.8	922.8
Change in fair value		(166.5)	(145.0)	(507.2)	(457.1)
Ending balance		$ (9,924.6)	$ (8,132.5)	$ (9,924.6)	$ (8,132.5)

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- Definition

Amounts related to additional proceeds from securitization of loans and tails of home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

+ References

No definition available.

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- Definition

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

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Principal repayment in connection with home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

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- Definition

Amounts related to securitization of home equity conversion mortgage-backed securities related borrowings accounted for as a financing.

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- Definition

This represents the amount of liability which is a resultant of reverse mortgage loans sold into the secondary with servicing rights retained. As the transfer of these loans do not meet the definition of participating interest because of the servicing requirement that requires the issuer to absorb some level of risk, these transfers are accounted for as financing.

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- Definition

Loans held for investment, reverse mortgages.

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- Definition

Loans held for investment, reverse mortgages, acquisitions.

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Loans Held For Investment, Reverse Mortgages, Fair Value Adjustment

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- Definition

Change in fair value of loans held for investment, reverse mortgages during the period.

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No definition available.

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- Definition

Amount of loans held for investment, reverse mortgages transferred to loans held for sale, fair value during the period.

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No definition available.

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- Definition

Amount of loans held for investment, reverse mortgages originated during the period.

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- Definition

Loans Held For Investment, Reverse Mortgages, Other

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- Definition

Amount of loans held for investment, reverse mortgages transferred to real estate owned during the period.

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No definition available.

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- Definition

Amount of loans held for investment, reverse mortgages transferred to receivables during the period.

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No definition available.

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- Definition

Principal payments received on loans held for investment during the period.

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- Definition

Amount of securitized loans held for investment, reverse mortgages.

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No definition available.

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- Definition

Amount of un securitized loans held for investment, reverse mortgages.

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No definition available.

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- Definition

Loans Held For Investment, Reverse Mortgages, Unpaid Principal

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No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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