Income Taxes - Provision/(Benefit) For Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current
U.S. federal	$ 8.5	$ 3.5	$ 3.5
Foreign	43.3	38.2	14.6
State and local	4.0	(1.2)	0.4
Total current	55.8	40.5	18.5
Deferred
U.S. federal	62.5	(1.7)	7.1
Foreign	22.4	(11.4)	(22.6)
State and local	8.5	0.3	(4.0)
Total deferred	93.4	(12.8)	(19.5)
Income tax expense (benefit)	$ 149.2	$ 27.7	$ (1.0)