Property, Plant and Equipment - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) Business	Dec. 31, 2015 USD ($) Business	Dec. 31, 2014 USD ($) Business
Property, Plant and Equipment [Abstract]
Property, plant and equipment acquired		$ 59.1
Number of businesses acquired | Business	0	2	4
Depreciation expense	$ 36.0	$ 31.5	$ 20.8