Net Sales - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenue, remaining performance obligation, expected timing of satisfaction, description	contracts have an original expected duration of one year or less, for our contracts with a duration greater than one year, the average remaining expected duration was approximately 14 months
Average revenue remaining performance obligation expected timing of satisfaction period	14 months
Contract liabilities	$ 8.1	$ 7.0
Contract with customer, liability partially offset revenue recognized	$ 1.4	$ 1.9