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.	$ 103.8	$ 102.8	$ 64.7
State and local	13.7	14.5	11.0
Foreign	61.9	63.9	60.9
Total current	179.4	181.2	136.6
Deferred
U.S.	(11.1)	(12.2)	(4.1)
State and local	1.7	(1.0)	(1.4)
Foreign	(5.3)	(5.3)	(0.6)
Total deferred	(14.7)	(18.5)	(6.1)
Total provision for income taxes	$ 164.7	$ 162.7	$ 130.5