Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax [Line Items]
Provision for income taxes	$ 7.6	$ 2.9
Valuation allowance	6.2		$ 6.6
Unrecognized tax benefits balance	1.7		$ 1.7
GILTI [Member]
Income Tax [Line Items]
Provision for income taxes	$ (0.1)	$ (1.2)