Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
U.S. federal	$ 111.5	$ 66.5	$ (33.1)
U.S. state and local	23.7	21.5	5.8
Non-U.S.	181.7	147.4	109.1
Deferred:
U.S. federal	(44.0)	(37.3)	(19.5)
U.S. state and local	(6.9)	(5.5)	(0.9)
Non-U.S.	(26.0)	(43.0)	(83.2)
Provision (benefit) for income taxes	$ 240.0	$ 149.6	$ (21.8)