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Debt (Schedule of Additional Information Related to Debt Instruments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revolving Secured Line of Credit [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	$ 1.8	$ 328.0
Average outstanding balance	0.7	166.8
Warehouse Facility II [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	251.0	201.0
Average outstanding balance	5.6	128.1
Warehouse Facility IV [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	0.0	0.0
Average outstanding balance	0.0	0.0
Warehouse Facility V [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	0.0	0.0
Average outstanding balance	0.0	0.0
Warehouse Facility VI [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	0.0	60.0
Average outstanding balance	0.0	29.7
Warehouse Facility VIII [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	0.0	100.0
Average outstanding balance	$ 0.0	$ 30.8

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Average amount borrowed under the credit facility during the period.

+ References

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- Definition

Maximum amount borrowed under the credit facility at any time during the period.

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