Receivables, Net - Rollforward of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts – January 1	$ 18.3	$ 16.1	$ 15.4
Charges to income	2.1	3.6	3.6
Write-offs	(9.2)	(0.8)	(4.4)
Foreign currency and other	0.1	(0.6)	1.5
Allowance for doubtful accounts – December 31	$ 11.3	$ 18.3	$ 16.1