Other Income (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Costs and expenses:	$ 16.6	$ 19.0	$ 35.0	$ 39.9
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	12.9		26.9
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	3.7		8.1
Third Party Providers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	13.0		27.0
Dealers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	3.6		8.0
Ancillary Product Profit Sharing [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	7.9	7.5	17.0	16.2
Ancillary Product Profit Sharing [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	7.9		17.0
Ancillary Product Profit Sharing [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.0
Ancillary Product Profit Sharing [Member] \| Third Party Providers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	7.9		17.0
Ancillary Product Profit Sharing [Member] \| Dealers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.0
Interest [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	5.0	7.8	9.8	16.2
Interest [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	5.0		9.8
Interest [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.0
Interest [Member] \| Third Party Providers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	5.0		9.8
Interest [Member] \| Dealers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.0
Remarketing Fees [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	3.5	3.3	7.6	6.7
Remarketing Fees [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.0
Remarketing Fees [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	3.5		7.6
Remarketing Fees [Member] \| Third Party Providers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.0
Remarketing Fees [Member] \| Dealers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	3.5		7.6
Other [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.2	$ 0.4	0.6	$ 0.8
Other [Member] \| Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.0		0.1
Other [Member] \| Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.2		0.5
Other [Member] \| Third Party Providers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	0.1		0.2
Other [Member] \| Dealers [Member]
Disaggregation of Revenue [Line Items]
Costs and expenses:	$ 0.1		$ 0.4