Asset Impairments - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Prepaid Asset
Impaired Long-Lived Assets Held and Used [Line Items]
Other asset impairment charges, net of tax			$ 1.2
Prepaid Asset | Cost of Goods Sold
Impaired Long-Lived Assets Held and Used [Line Items]
Other asset impairment charges	$ 1.2		$ 1.2
In-Process Research And Development
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill), Net of Tax				$ 2.8	$ 4.3
In-Process Research And Development | Research and Development Expense
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 4.5		$ 4.5	$ 6.8