Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Allowance for Doubtful Accounts [Abstract]
Accounts Receivable, Allowance for Credit Loss	$ 23.2	$ 14.1	$ 19.0	$ 13.5
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	6.2	1.8
Accounts Receivable, Allowance for Credit Loss, Writeoff	(2.0)	$ (1.2)
Goodwill, Foreign Currency Translation Gain (Loss)	(100.2)
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)	$ 63.6