Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Change in the carrying amount of goodwill
Balance at the beginning of the year	$ 2,105.9	$ 2,107.6
Acquisitions	2.5
Purchase price allocation adjustments		5.3
Effect of foreign currency translation	2.7	(7.0)
Balance at the end of the year	2,111.1	2,105.9
Accumulated impairment losses	$ 0.0	$ 0.0