Receivables, Net - Rollforward of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts - January 1	$ 16.1	$ 13.3	$ 12.6
Charges to income	1.5	3.6	4.0
Write-offs	(1.5)	(0.8)	(1.6)
Foreign currency and other	(0.7)	0.0	(1.7)
Allowance for doubtful accounts - December 31	$ 15.4	$ 16.1	$ 13.3