Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current tax provision:
U.S. Federal	$ 29.2	$ 62.8	$ 56.9
State and local	10.1	11.8	13.8
Non-U.S.	58.4	49.3	40.1
Total current tax provision	97.7	123.9	110.8
Deferred tax provision:
U.S. Federal	(99.9)	(94.1)	(92.6)
State and local	(14.9)	(42.8)	15.1
Non-U.S.	(17.1)	(15.8)	(9.9)
Total deferred tax provision	(131.9)	(152.7)	(87.4)
Provision (benefit) for income taxes	$ (34.2)	$ (28.8)	$ 23.4