Other Current Assets (Schedule of Other Current Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses and deposits	$ 52.3	$ 52.5
Inventory deposits	17.4	16.5
Advances against auction contracts	7.3	21.9
Derivative financial assets	0.0	0.3
Other current assets	$ 77.0	$ 91.2