Acquisition-related and Integration Costs (Schedule of Acquisition Related and Integration Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Business Combination [Line Items]
Acquisition-related and integration costs	$ 19.4	$ 29.0	$ 216.1
JM Wood Auction Co Inc
Business Combination [Line Items]
Acquisition-related and integration costs	13.4	0.0	0.0
IAA
Business Combination [Line Items]
Acquisition-related and integration costs	3.4	27.7	209.8
Other acquisitions
Business Combination [Line Items]
Acquisition-related and integration costs	$ 2.6	$ 1.3	$ 6.3