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Interest Expense - Schedule of Components of Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt securities:
Interest expense	$ 75.6	$ 73.1	$ 142.7	$ 140.5
Amortization of Debt Issuance Costs and Discounts			11.6	17.9
OFC Senior Secured Notes
Debt securities:
Interest expense	0.0	11.4	0.0	22.6
Senior Notes
Debt securities:
Interest expense	0.0	6.5	0.0	13.9
MSR financing facilities
Debt securities:
Interest expense	21.6	19.6	40.2	37.5
Mortgage loan financing facilities
Debt securities:
Interest expense	31.8	24.8	57.9	43.5
Advance match funded liabilities
Debt securities:
Interest expense	7.8	9.3	15.7	19.8
Escrow
Debt securities:
Interest expense	1.6	1.4	3.3	3.2
Senior Notes Due 2029
Debt securities:
Interest expense	$ 12.9	$ 0.0	$ 25.7	$ 0.0

X

- Definition

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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