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Short-Term Debt - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Jul. 01, 2022
Short-term Debt [Line Items]
Average balance of short-term debt	$ 1,120.0	$ 1,210.0
Accrued interest payable on short-term debt	7.0	7.0	$ 7.0
Convertible notes
Short-term Debt [Line Items]
Repurchased debt instrument	31.0	64.0
Gain (loss) on extinguishment of debt	0.1	0.2
Debt instrument, face amount	113.0	113.0
Riverbend Funding, LLC | Minimum
Short-term Debt [Line Items]
Fixed interest rate (as a percentage)				6.00%
Riverbend Funding, LLC | Maximum
Short-term Debt [Line Items]
Fixed interest rate (as a percentage)				8.00%
Servicer advance financing
Short-term Debt [Line Items]
Accrued interest payable on short-term debt	0.4	0.4
Unamortized capitalized commitment costs	$ (0.3)	$ (0.3)

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Face (par) amount of debt instrument at time of issuance.

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