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Summary of Significant Accounting Policies $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022 USD ($)	Mar. 31, 2022 segment	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments | segment		1
Uninsured cash and cash equivalents	$ 10.4			$ 10.4		$ 22.9
Provision for credit losses	180.3		$ (8.3)	351.1	$ (17.5)
Restricted Cash and Cash Equivalents [Member]
Summary Of Significant Accounting Policies [Line Items]
Uninsured cash and cash equivalents	381.2			381.2		$ 407.9
New Consumer Loan Assignments [Member]
Summary Of Significant Accounting Policies [Line Items]
Provision for credit losses	83.4		75.5	283.5	298.9
Loans Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Provision for credit losses	$ 0.0		$ 0.0	$ 0.0	$ 0.0

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Summary Of Significant Accounting Policies [Line Items]

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The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of expense related to estimated loss from loan and lease transactions.

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