Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 72.7	$ 56.5	$ 46.4
State	17.2	13.4	18.2
Foreign	29.6	27.4	26.8
Deferred	11.9	(80.8)	(7.5)
Total provision for income taxes	$ 131.4	$ 16.5	$ 83.9