Income Taxes - Income (Loss) before Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
U.S.	$ (360.7)	$ (266.6)	$ (266.0)
Non-U.S	279.6	239.4	220.8
Income (loss) before provision (benefit) for income taxes and equity in net income of affiliates	$ (81.1)	$ (27.2)	$ (45.2)