Borrowings - Schedule of Maturities of Long-term Borrowings (Details) $ in Millions	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
2025	$ 2,111.9
2026	393.7
2027	410.0
2028	23.1
2029	500.0
Thereafter	0.0
Long-term debt, gross	3,438.7
Fair value	3,395.0
Match Funded Liabilities
Debt Instrument [Line Items]
2025	416.5
2026	0.6
2027	0.0
2028	0.0
2029	0.0
Thereafter	0.0
Long-term debt, gross	417.1
Fair value	417.1
Mortgage Loan Warehouse Facilities
Debt Instrument [Line Items]
2025	1,010.1
2026	143.5
2027	410.0
2028	0.0
2029	0.0
Thereafter	0.0
Long-term debt, gross	1,563.6
Fair value	1,535.3
MSR Financing Facilities
Debt Instrument [Line Items]
2025	685.4
2026	249.5
2027	0.0
2028	23.1
2029
Thereafter	0.0
Long-term debt, gross	958.0
Fair value	947.6
Senior Notes
Debt Instrument [Line Items]
2025	0.0
2026	0.0
2027	0.0
2028	0.0
2029	500.0
Thereafter	0.0
Long-term debt, gross	500.0
Fair value	$ 495.0

Long term debt maturities repayments of principal, gross.

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