Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Other Intangible Assets [Line Items]
Identifiable accumulated amortization	$ (4.5)	$ (2.1)
Identifiable intangible assets, net	12.5	15.1
Customer Relationships
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangible assets gross	$ 17.0	17.0
Product Formulations
Goodwill And Other Intangible Assets [Line Items]
Identifiable intangible assets gross		$ 0.2